Mining & Aggregate Market Applications & Innovations

Applications & Innovations
Mining & Aggregate
Market

We’re committed to the
Mining & Aggregate Market
The companies of Altra Industrial Motion offer many critical
drivetrain products utilized in mine and quarry applications including
clutches & brakes, enclosed gearing and geared motors, couplings,
overload clutches and torque-limiting devices, and belted drives.
Altra Brands Deliver Value Throughout the Drivetrain
Altra Industrial Motion is positioned to provide OEMs with
exceptional drivetrain value by ensuring component compatibility
and optimized performance combined with time-saving,
single-source convenience.
Extensive Technical Experience in Mining Applications
Major OEMs routinely rely on the vast mine and quarry application
knowledge of Altra’s engineering teams that collaborate to
thoroughly analyze specific customer applications and then apply the
latest technologies in design, materials and manufacturing.

Highly engineered Altra power transmission products and Genuine
Replacement Parts provide exceptional performance in a wide range
of applications including:
• Inclined & Overland Conveyors
• Ball & Sag Mills
• Crushers
• Sizers & Feeder Breakers
• Shovels & Draglines
• Ventilation Fans & HVAC Systems
• Winders & Hoists
• Blast Hole Drills
• Haul Trucks
• Utility Vehicles & Shuttle Cars
• Longwall and Continuous Miners
• Stacker/Reclaimers
• Railcar Positioners & Dumpers (Wagon Tipplers)
• Pumps and Compressors
• Sedimentation Tanks & Flotation Cells
• Belt Filter Presses

Global Service and Repair Support
Altra Industrial Motion provides service and repair centers that are
strategically located near many of the World’s largest mining regions.
This level of global support helps keep our customer’s mine
operations running smoothly and profitably by reducing downtime.
• North America: Certified rebuild & service facility for Marland Clutch
• Brazil: Certified rebuild & service facility for Marland Clutch
• South Africa: Certified rebuild, service and assembly facility for
Marland Clutch, Svendborg Brakes & Bibby Turboflex
• Australia: Certified rebuild and service facility for Marland Clutch
& Svendborg Brakes

Heavy-Duty Altra Caliper Brakes Provide
Superior Performance on
Grinding Mills at Mines Worldwide
Application ProfileApplication Profile

• Leading grinding mill OEMs and mine operators rely on Twiflex Limited
for efficient and cost-effective hydraulic caliper braking solutions for ball
and SAG mills.
• Twiflex VMS-DP spring-applied, hydraulically-released floating caliper
brakes are widely used on gearless ball and SAG mills around the world.
The brakes provide an adjustable braking force from 590 to 737 kN at
2mm air gap and a friction coefficient of 0.4.
• For geared grinding mills, Twiflex offers its popular VKSD spring-applied,
hydraulically-released brake caliper which produces up to 119 kN braking
force at 2mm air gap and 0.4 coefficient of friction.
• Monospring VKSD-FL (floating version) brakes, fitted to a torque limiter
are commonly used on geared mills that are direct-driven using a VFD
motor. This floating option allows for movement during mill start up.
• VMS-DP and VKSD-FL brakes incorporate Twiflex’s unique “Park Off”
feature that allows the brakes to be set to remove all stored energy,
making it completely safe for pad replacement and maintenance.
Heavy-Duty Altra Caliper Brakes Provide
Superior Performance on
Grinding Mills at Mines Worldwide
www.twiflex.comP-7844-TF.pdf *Source: International Mining Magazine

World’s Largest Ball Mills
Problem:
Heavy-duty brakes were needed for two 8-meter ball mills on
South Africa’s largest platinum concentrator near Mokopane.
The brakes are required to control (stop, hold, position) each
ball mill drum with a total inertia of 14,195,400 kgm2
.
Solution:
Six Twiflex VMS-DP modular brakes were installed on each
of the two ball mills providing a total braking force of 4.4 MN
(737 KN per brake).
• One-third smaller than caliper brakes – reduced size
and cost
• Able to stop a full process charge in a staggering
0.5 seconds
• Hydraulic powerpack offers soft-braking option between
6-10 seconds
• Year-round reliable operation
Application Profile
Twiflex VMS-DP Spring-Applied,
Hydraulically-Released Safety Brakes

Copper Mine Grinding Mills
Problem:
Metso Minerals Industries required an advanced braking system
for two gearless driven grinding mills at the largest open pit
copper mine in Europe. Both 22.5 MW mills are 11.6 (38 ft.) in
diameter and operate at 2025 t/h.
Solution:
Twiflex Ltd./Hilliard Corp. provided eight VMS-DP brake calipers
(with pedestals) plus a hydraulic power pack for each mill.
• VMS-DP caliper brakes are designed specifically for mine
grinding mill installations
• Adjustable braking force from 590 to 737 KN per brake
• Units are able to stop a full process charge in less than
2.0 seconds
• Brakes provide both static and dynamic braking functions
Application Profile
Twiflex VMS-DP Spring-Applied,
Hydraulically-Released Safety Brakes

Copper/Gold Mine SAG
and Ball Mills
Problem:
Multiple braking systems were required by Metso Minerals
Industries, Inc. for SAG and ball mills at their Mount Milligan
mine, located in Canada. The open pit mining operation
provides mill feed at a nominal rate of 60,000 t/d (21.9 Mt/a).
Annual mine production averages 81 m lb./year copper and
194,000 oz./year gold in concentrates.
Solution:
• Twiflex supplied spring-applied VMS-DP brakes, together with
an electro-hydraulic power pack, for both static and dynamic
braking functions on the mine’s 22 MW, 12.2 m diameter
(40 ft.) gearless SAG mill.
• Twiflex VKSD-FL spring-applied, hydraulically-released brake
calipers (combined with power packs) were supplied for use
on the mine’s two 24 ft. dia. dual-pinion, direct-drive geared
ball mills.
Application Profile
VKSD-FL and VMS-DP Brakes

Copper/Molybdenum
Mine Ball Mills
Problem:
A global grinding mill OEM required braking systems for 6 new
ball mills that are part of a major expansion at an open-pit
copper/molybdenum mine in southern Peru. Each mill is 9.5 m
(27 ft.) in diameter and equipped with a 22 MW gearless drive.
Solution:
Svendborg Brakes supplied complete braking systems for each
ball mill consisting of BSFA 1000 Series mono-spring failsafe,
direct-acting hydraulically-released caliper brakes.
• Minimum of 18,103,932 Nm braking torque per mill.
• Gearless mill hydraulic power unit (HPU) supplied for each mill.
• Six braking systems share the same design, allowing for
standardization and reduced spare parts inventory
• Custom-fabricated pedestals feature hard hydraulic piping
• Locally-based Svendborg Brakes technicians assisted with
on-site installation and commissioning
Application Profile
BSFA 1000 Series Braking Systems
Application Profile

Copper Mine Gearless
Ball and SAG Mills
Problem:
Reliable braking systems were needed for a gearless SAG mill
and twin gearless ball mills at a copper mine located in the
mountains of central Chile. The large, open-pit mine produces
approximately 45,000 tonnes of copper annually.
Solution:
Svendborg Brakes supplied complete braking systems for all
three mills consisting of BSFA 1000 Series mono-spring failsafe,
direct-acting hydraulically-released caliper brakes.
• Minimum 11,414,975 Nm braking torque for the 40 ft. diameter,
26 ft. long, 32,000 HP gearless SAG mill
• Minimum 10,584,241 Nm braking torque for each of the two
27 ft. diameter, 46 ft. long 27,000 HP gearless ball mills
• Gearless mill hydraulic power unit (HPU) supplied for each mill
• Custom-fabricated pedestals feature hard hydraulic piping
Application Profile
BSFA 1000 Series Braking Systems
Application Profile

Copper Mine SAG Mill
Problem:
A Leading global grinding mill OEM needed a reliable clutch
solution for a geared SAG mill at one of China’s largest open
pit copper mines. The clutch is needed to provide smooth
starts during mill startup. While the mill is running, the clutch
also functions as a torque limiter, reducing expensive downtime
and repairs by protecting the drivetrain from possible damage
caused by falling ore.
Solution:
Wichita Clutch provided a Model 336H Grinding Mill Clutch
(GMC) with 36 in. dia. friction discs and a torque rating of
2,134,650 in.lbs. (241,183 Nm) to meet the tough mill
application requirements.
• Air-applied clutch with full-circle friction discs
• High-coefficient, high energy absorbing friction material
• High heat dissipation for jogging and inching during routine
maintenance
Application Profile
Grinding Mill Clutch

Copper Mine Grinding Mill
Problem:
A reliable clutch solution was required for a ball mill at one of
the world’s largest open pit copper mines located in Mexico.
The clutch’s primary role on the dual-pinion, direct-drive geared
mill is to provide smooth starts during mill startup. When the mill
is running, the clutch also serves as a torque “circuit breaker,”
reducing costly repairs and downtime by protecting the pinion
and ring gear from potential damage caused by grinding material.
Solution:
Wichita Clutch supplied a Model 360 Grinding Mill Clutch (GMC)
with 60 in. diameter friction discs and a torque rating of
11,870,250 in.lbs. (1,341,158 Nm).
• Air-applied clutch with full-circle friction discs
• High heat dissipation for jogging and inching during
routine maintenance
• Torque capacity not affected by centrifugal force
• Quick-change ring allows easier access to friction discs
Application Profile
Grinding Mill Clutch

Coal Mine Ball Mill
Problem:
A coal mine operator in South Africa installed non-genuine
replacement friction discs in a large 60-inch Wichita Standard
Ventilated Clutch. Upon machine start up, it was discovered that
the discs were severely unbalanced, which led to a very high
level of vibratory load and subsequent premature tooth failure.
The machine was stopped almost immediately after installation.
Unfortunately, damage had already been inflicted to the main
clutch parts resulting in unnecessary expense and downtime.
Solution:
The bad friction discs were replaced with high-quality Genuine
Wichita replacement discs that are manufactured using a
one-piece casting for dependable, long life service. Special
high-strength proprietary materials with molded composite
teeth resist functional wear and provide additional output
torque, longer life, and more consistent operation.
Application Profile
Genuine Wichita Replacement Friction Discs

Copper Mine Grinding Mill
Problem:
A large copper mine operator in South Africa fitted non-genuine
replacement friction discs in a large 34-inch Wichita Standard
Ventilated Clutch with catastrophic consequences. The new
parts were installed in the Wichita clutch during a scheduled
service period. Shortly afterwards the clutch caught fire
resulting in unnecessary extra costs.
Solution:
The damaged clutch was shipped to Wichita Clutch where it
was rebuilt with Genuine Wichita Clutch replacement friction
discs and is now functioning as per the original specification.
• High-strength proprietary friction material
• Molded composite reinforced gear teeth
• Consistent size for ease of fit and replacement
• 2-year warranty
Application Profile
Genuine Wichita Replacement Friction Discs

Application Profile
Mine SAG Mill
Problem:
A large mine grinding mill OEM required a centrifugal clutch
solution for a new SAG mill. The clutch’s primary role is to
allow for smooth, controlled starts during mill startup. It
provides protection against the shock loads which occur during
the
starting of a rigidly coupled mill drive. These starting torque
loads are capable of causing serious damage to the mill’s
expensive drivetrain components.
Solution:
Boston Gear, working closely with a distribution partner,
supplied a large, 24 in. diameter Centric Centrifugal Clutch
(CCC) to meet the demanding mill application requirements.
• Controlled soft-start acceleration
• Protection against shock loads during start-up
• Automatic engagement and disengagement
• Delayed engagement produces a “no load start”
Centric®
Centrifugal Clutch

Fertilizer Plant Ball Mills
Problem:
One of China’s largest chemical/fertilizer producers was
experiencing unusually high failure rates of the clutches
installed on three ball mills at its processing facility. The clutch’s
friction discs needed to be replaced every six months which was
a very costly and labor intensive problem. In late 2018, the
facility operators decided to undertake a complete renovation of
the mills, including the replacement of the clutches, to rectify the
unsustainable situation.
Solution:
Since Wichita Clutch was not a well-recognized brand in the
Chinese chemical phosphorite industry, a customer tour of a
nearby facility where Wichita clutches were successfully
installed was arranged. Ultimately Wichita Clutch Model 342
Grinding Mill Clutches (GMCs) were selected for all three mills
based on competitive pricing and a high level of trust. Units
have a torque rating of 2,898,070 in.lbs. (327,437 Nm).
Application Profile
GMC Grinding Mill Clutches

Brake Solutions from Altra Provide
Long-Lasting Performance on
Draglines Around the World

• Industrial Clutch disc brakes and Twiflex caliper brakes are used for
controlled engagement and emergency stopping on rope hoists, bucket
drag winches and swing, propel, and crowd motion applications.
• Installed on draglines for more than 40 years, Twiflex GMR-SD brakes
offer many advantages.
- Modularity/Flexibility
- Adjustable Torque
- Low Maintenance
- Air Released
• Industrial Clutch LKB disc brakes provide superior performance versus
drum style brakes on draglines since 1980.
- High-energy metallic linings with large swept areas
- Excellent heat dissipation
- Uniform stopping distances
- Long lining life
- High-strength alloy steel drive studs
Brake Solutions from Altra Provide Long-Lasting
Performance on Draglines Around the World
www.twiflex.comP-7808-C www.indclutch.com *Source: www.parkerbaymining.com

Coal Mine Dragline
Problem:
The dragline at a mine in Queensland, Australia recently
required a comprehensive maintenance overhaul. Originally
commissioned in 2008, the dragline’s braking systems
needed to be replaced after the extreme wear and tear of
operating 24/7/365 for more than 4 years in the tough mine pit
environment.
Solution:
Twiflex was selected to provide all the required replacement
brakes. To meet the machine’s hoist and drag performance
demands, Twiflex delivered spring-applied, air-released
GMR-SD 15.6 caliper brakes that provided a combined braking
force of 72 kN on each of 14 motors. GMR-SD 4.5 brakes
operating were used to supply 21 kN braking force on each
of the 8 swing motors.
Application Profile
GMR-SD Caliper Brakes

Bowen Basin Dragline
Problem:
A major Australian coal mine operator needed to replace the
brakes on the massive 6,950 ton dragline at their mine in the
Bowen Basin. In constant operation since 2011, the dragline’s
original braking systems had reached their useful service life.
Solution:
Twiflex was selected to provide GMR-SD spring-applied,
air-released replacement caliper brakes for all the dragline’s
motors:
• 8 hoist & 8 drag 1450 HP motors: Each with multiple
GMR-SD 15.6 caliper brakes that provide a combined
braking force of 72 kN
• 8 swing 1045 HP motors: Each with multiple GMR-SD 8.4
caliper brakes that provide a combined braking force of 39 kN
• 4 propel 1045 HP motors: Each with multiple GMR-SD 15.6
caliper brakes that provide a combined braking force of 72 kN
Application Profile

Coal Field Dragline
Problem:
Brakes were needed for a new medium-duty 4,500 ton
dragline at a mine in India. The brakes stop the dragline’s
load from moving as quickly as possible and bring it to rest in
a controlled manner to avoid shocking the drivetrain and
machine frame.
Solution:
Twiflex provided GMR-SD spring-applied, air-released caliper
brakes which are designed to handle the high energy
associated with stopping these massive loads. Brakes were
supplied for the following dragline motors:
• 4 hoist & 4 drag 1230 kW motors: Each with multiple
GMR-SD 15.6 caliper brakes that provide a combined
braking force of 108 kN
• 4 swing 932 kW motors: Each with multiple GMR-SD 8.4
caliper brakes that provide a combined braking force of
58.5 kN
Application Profile

Application Profile
Mine Dragline
Problem:
A major U.S. mine operator needed to replace some of the
brakes on one of their draglines which removes overburden
to expose coal deposits. The 8,000-ton dragline features a
large boom and a massive bucket, with a capacity of approx.
110 cu.yds. The bucket is lowered over the desired area,
dragged along the surface until full, then lifted and swung to
a designated dumping area.
Solution:
Working closely with their distributor partner, Industrial Clutch
supplied LKB 325 spring-set, pneumatically-released brakes,
with 300,000 in.lb. torque capacity, for the dragline’s hoist motors
and drag rope drives.
• Non-asbestos lining materials with large pad areas for
maximum heat dissipation
• High-strength alloy steel drive studs
• Actuation springs sized for maximum life
LKB Brakes

Application Profile
Dragline Ventilation Fans
Problem:
A leading global fan OEM needed an economical backstop
for cooling fans used to prevent overheating of personnel and
equipment on a mine dragline. Problems occur when the
ventilation fans are turned off and air flow from the
environment or other fans in the system can back-drive the
fans, causing them to rotate in the opposite direction
(windmilling). Starting a fan while it is windmilling can damage
the motor and reduce the life of the drive system belts.
Solution:
Formsprag engineers specifically designed the economical,
low-torque LCB Series backstop to prevent problems
associated with windmilling in fan applications. The Model
LCB-200, with a torque rating of 150 lb.ft. (200 Nm) and a
speed range of 0-3600 RPM, was the ideal solution for this
application.
LCB-200 Backstops

Application Profile
Rope Shovel Ventilation Fans
Problem:
A major manufacturer of fans and blowers needed a high-
torque clutch solution for installation on mine shovel ventilation
fans. The fans prevent equipment overheating by improving
cooling and ventilation inside the shovel’s diesel engine
compartment. The backstopping clutches, mounted to each
individual fan shaft, prevent reverse rotation (windmilling) that
is caused by air flow from the environment when the ventilation
fans are turned off.
Solution:
Formsprag Model FSO-600 clutches with a 2250 lb.ft.
(3060 Nm) torque capacity met the customer’s application
requirements.
• Low-maintenance
• High-torque density
• Require no adjustments or controls
Model FSO Backstopping Clutches

Limestone Quarry Dragline
Problem:
The operator of a limestone quarry in Florida needed to
replace the braking systems on its dragline. After years of
continual service, the original brakes had reached the end of
their useful life. The dragline uses brakes for the different
drive systems that control the machine’s hoist, drag, swing
and walking motions. Instead of trying to keep the quarry pit
pumped dry, the dragline removes stone from the flooded pit
with a special dredging bucket design that features large
holes for drainage.
Solution:
Twiflex worked with its distributor partner to provide the
required replacement brakes. To meet the machine’s swing,
hoist and drag performance demands, Twiflex delivered
spring-applied, air-released GMR-SD caliper brakes. Brake
discs, backplates and custom hubs were also supplied. All
components were assembled into complete custom brake
packages by the distributor.
Application Profile

Application Profile
Mine Rope Shovel
Problem:
An operator of a large open pit mine in the Western US needed
a replacement drive for the rope winch on one of its shovels.
The winch, located inside the shovel’s housing, is used to draw
the heavy-duty cable (rope) from the drum and pull it through
the boom sheaves during routine rope replacement operations.
The speed reducer is positioned between the electric motor
and winch drum.
Solution:
To meet the challenging application requirements, Boston
Gear recommended a Series 2000 helical inline gear drive.
The double reduction model has a NEMA C-Face motor input
with a 3-Jaw coupling. The rugged cast iron housing with
heavy-duty ground steel gears are designed to withstand
adverse mine conditions. Machined mounting registers allow
for quick alignment so installation is fast and easy.
Series 2000 Inline Drive

Mine Rope Shovels
Problem:
A global mine rope shovel OEM required a robust replacement
coupling solution that could accommodate a high degree of
misalignment due to the deflection that occurs as the massive
machines twist and flex during loading, unloading and rotating.
The couplings are installed on drive motors that operate the
shovel’s propulsion, crowd, swing, and bucket hoist winches.
Solution:
After a careful review of the application, Amerigear SF Type
flexible spindles were selected. For many years, Ameridrives had
been manufacturing gear spindles designed to accommodate
high torque and high misalignment for the steel industry, so the
gear spindles were a natural solution. Ameridrive SF (Flange
Type) spindles feature special molded high angle lip type seals,
custom gear tooth geometry, and gear teeth that are heat treated
to provide higher torque ratings. The AISI-1045 induction
hardened spindles provide up to 6 degrees of misalignment.
Application Profile
SF Type Gear Spindles

Twiflex Braking Technologies Provide
Reliable Performance on Challenging
Mine Winder Applications

• As a recognized global leader in mine hoist braking technologies,
Twiflex offers a full line of mine-ready systems, including their popular
VKSD, VSD and VMS brake ranges.
• Installed on many of the world’s largest mine hoists, the spring-applied,
hydraulically-released VMS3-SPS brake offers up to 276 kN braking
force at 3mm air gap with a 0.4 coefficient of friction.
• The recently introduced VSD series brake is designed for industrial
applications including mine hoists. VSD spring-applied, hydraulically-
released disc brakes are available in a range of sizes with braking
forces from 100 kN to 220 kN.
• Available in a range of sizes, with braking forces from 26 kN to 119 kN,
Twiflex VKSD brakes are ideal for use on smaller mine hoist applications.
• All brake models include Twiflex’s unique “Park Off” feature where the
brake can be set to remove all stored energy, making it completely safe
for pad replacement and maintenance.
Twiflex Braking Technologies Provide
Reliable Performance on Challenging
Mine Winder Applications
www.twiflex.comP-7843-TF.pdf *Source: www.flsmidth.com

Mine Hoist
Problem:
A leading mine hoist OEM required reliable brakes for use at a
gold mine in northern Canada. The mine is projected to process
7,000 tons throughput per day, producing 600,000 ounces of
gold per year.
Solution:
Twiflex delivered (10) VMS3/SPS brake calipers for use on a 20
ft. diameter double-drum, single-clutch mine hoist which has two
brake discs.
• Each VMS3/SPS unit provides a braking force of 240 kNm
at 2.5mm air gap
• On-site torque adjustment and a “Park-Off” feature which
allows for fast seal changes without special tools
• Design integrates small size pistons for quicker reaction times
• Brakes are totally sealed for exceptional corrosion and dust
protection
Application Profile
Twiflex VMS3/SPS Spring-Applied,
Hydraulically-Released Brakes

Copper Mine BMR
Double-Drum Winder
Problem:
FLSmidth, a leading global mine hoist OEM, chose to work
with Twiflex to develop a new brake solution for use on a
Blair multi-rope (BMR) double-drum hoist at the Mopani
Copper Mines’ Nkana site in Zambia. The copper and cobalt
mine is one of the largest in Africa. The brakes are used for
parking/holding each time the mine winder stops as well as in
an emergency (eg: power failure).
Solution:
To meet the hoists higher rubbing speeds and provide a
higher thermal capacity for the emergency stop, Twiflex
engineers designed a new large pad version (174700 mm2
each pad) of its popular VMS3-SPS spring-applied,
hydraulically-released brake.
• 240 kN braking force
• Unique ‘parked-off’ feature
Application Profile
VMS3-VR Brakes

Gold Mine Hoist
Problem:
A new brake solution was needed for use on a hoist at the
Elko Gold Mine in Nevada. While the braking speed was low
at 500 rpm, the stopping time required was between three
and five seconds so the peak disc temperature and power
dissipation during the stop was high.
Solution:
To meet the application challenges, a large pad version of
the popular Twiflex VCSD designated the ‘VR’ was selected
to provide an increased braking path for higher rubbing
speeds and greater thermal capacity.
• Two VCSD-VR brakes were supplied for each motor pinion
operating on a 1.168 m diameter disc to produce a total
torque of 128 kNm.
• VR models feature large pads (28,990 mm2 each pad)
• Unique ‘parked-off’ feature
Application Profile
VCSD-VR Brakes

Mine Emergency Escape
Vent Hoist
Problem:
A leading mine hoist and elevator manufacturer located in the
Eastern U.S. required a custom braking solution for a new
combination emergency escape hoist and ventilation package.
In an emergency, when the mine’s large primary hoist is not
accessible, the escape hoist can bring personnel to the surface
quickly utilizing the mine’s ventilation shaft.
Solution:
• Twiflex supplied a pair of Model VKSD spring-applied,
hydraulically released, dual-spring caliper brakes acting on
discs shaft-mounted to either side of the hoist’s cable reel.
• Svendborg Brakes provided an industry-leading SOBO iQ
soft braking control and a pair of SOBO iQ hydraulic
power units.
Application Profile
VKSD Braking System with SOBO®
iQ

Mine Escape Hoist
Problem:
A major mine hoist OEM needed a custom braking solution for
an emergency escape hoist positioned in a mine ventilation
shaft. In an emergency, when the mine’s large primary hoist is
not accessible, the escape hoist can be utilized to transport
workers to the surface quickly.
Solution:
To meet the hoist’s emergency stopping and parking application
requirements, Twiflex provided Series VKSD spring-applied,
hydraulically released, dual-spring caliper brakes acting on a
pair of discs shaft-mounted to the hoist’s cable reel. The Twiflex
Model VKSD58 disc brakes supplied feature a braking force of
58 kN. The brakes were modified to meet the customer’s
mounting requirements and proximity switches were mounted to
the end covers. A SOBO iQ hydraulic power unit and a SOBO
iQ soft braking control were supplied by Svendborg Brakes.
Application Profile
VKSD Braking System with SOBO®
iQ

Coal Mine Winder
Problem:
The maintenance team at a coal mine in South Yorkshire,
England needed to replace the grid coupling on the friction
winder at their facility. The grid coupling connects the motor shaft
to the winder cable drum located in the headframe at the top of
winder tower. The original Bibby coupling was in generally good
condition, but was starting to show some slight wear after more
than 30 years of service.
Solution:
The team contacted Bibby Turboflex directly since they were
very pleased with the original coupling’s long-lasting
performance. Bibby supplied an H-Type, Model 722 replacement
grid coupling which provides great shock load absorption.
• Torque capacity of 228,400 Nm (168,459 lb.ft.)
• 1100 mm (43.3 in.) dia.; weighed >2000 kgs (4,409 lbs.)
• 655 RPM maximum speed
• 350 mm (13.7 in.) maximum shaft diameter
Application Profile
H-Type Resilient Grid Coupling

Gold Mine Winder
Problem:
The operators of a South African gold mine needed a
replacement coupling on a winder at their site. The winder
transports workers and material to and from the surface of the
3.9 km (2.4 mile) deep mine. A one-way trip takes about an hour.
The grid coupling connects the drive motor shaft to the gearbox
on the main drivetrain located at the top of winder tower. The
original Bibby coupling, in operation since 1962 when the mine
opened, was starting to show some wear.
Solution:
Based on the extremely long service life of the original Bibby
coupling, the mine operator asked Bibby to provide a solution to
the coupling problem. Bibby supplied a 1.2 m (3.9 ft.) diameter
H-Type, Model 734 replacement grid coupling, which provides
an exceptional amount of flexibility. Weighing more than 2.5 tons
(5,600 lbs.), the coupling was one of the largest manufactured
at Bibby’s facility in Bedford, U.K.
Application Profile
Custom Grid Coupling

Altra Combined Overload and Overrunning
Clutch Solution Provides Superior
Protection and Safety on
Cone Crusher Applications

• An overload clutch is needed to provide critical “anti-spin” protection
during crusher startup, which prevents material from flying out of the
bowl, creating a dangerous condition. As wear occurs, the crusher’s
mantle needs to be recalibrated. A torque limiting clutch slips during
recalibration but quickly re-engages to return to the original material
(rock) size to ensure desired product uniformity.
• To meet the dual-clutch requirements, Boston Gear engineers worked
with Formsprag Clutch, to design a unique single-piece, packaged
overrunning/torque-limiting clutch solution.
• The combined unit is a modified HOR clutch that incorporates the outer
race of a special FSO clutch.
• The modified automatic reset HOR overload release clutch features a
unique ramp system that utilizes a 360-degree, multiple “teardrop” ball
detent design. This allows the clutch to reset quickly following the
calibration procedure.
Altra Combined Overload and Overrunning Clutch
Solution Provides Superior Protection and Safety
on Cone Crusher Applications
www.bostongear.com
P-8169-C.pdf *Source: Metsowww.formsprag.com

Application Profile
Mine Cone Crusher
Problem:
A mine equipment manufacturer required a reliable
overrunning
clutch for use on a cone crusher. Ore is crushed between an
eccentrically rotating cone mantle and a concave bowl liner.
The clutch prevents the mantle head from rotating in the
reverse direction from the design parameters.
Solution:
Formsprag Clutch supplied a grease-lubricated, 8.75" diameter
FSO-750 clutch with a 7,000 lb.ft. (9,520 Nm) torque capacity
to meet the challenging application requirements. FSO
overrunning clutches feature a high torque density and require
no adjustments or controls.
• Formchrome® sprags and “Free-action” retainers
• Units mount on a through shaft, with the inner race driven
by a key
FSO Overrunning Clutch

Application Profile
Mine Bowl Crusher
Problem:
A major mine crusher OEM needed an overload clutch solution
for a new line of bowl crushers. Material is fed through the top
of the crusher and falls over a cone shaped mantle that rotates
in an eccentric fashion. The clutch rotates as the drive slips
during mantle re-calibration and then returns to the original
material (rock) size to ensure desired product uniformity. The
clutch also provides critical “anti-spin” protection during startup
to prevent material from flying out of the bowl.
Solution:
To meet the OEM’s demanding performance requirements
Boston Gear supplies several sizes of HOR Series ball detent
overload clutches with torque ranges up to 50,000 in.lbs.
• Unit performs as both an overrunning clutch and a torque
limiting clutch. Torque limiting in one direction, overrunning in
the opposite direction
HOR Series Overload Clutch

Mine Crusher
Problem:
A replacement clutch was needed for use on an older
belt-driven crusher at a U.S. mine. The clutch is mounted
directly to a 42" diameter, five-belt sheave positioned on the
main crushing roller shaft.
Solution:
Wichita Clutch provided a Model 330H Standard Vent Clutch
(SVC) to meet the rigorous-duty application requirements.
The SVC is ideally suited for large-inertia loads such as on
mine crushers, where smooth, controlled starts are needed.
• 34" diameter high-Inertia, spring-set, pneumatic clutch
• Provides smooth, controlled acceleration
• 981,000 in.lb. of slip torque
• 1,100 RPM max speed
• Unaffected by centrifugal force
• Full-width molded composition teeth on friction discs
Application Profile
Standard Vent Clutch

Application Profile
Mine Crusher
Problem:
A U.S. mine equipment manufacturer needed a robust, reliable
brake solution for one of its larger crushers. The brake provides
emergency stop functionality in case of a jam or other problem
conditions.
Solution:
Industrial Clutch supplied a 21" diameter LKB 217 brake with
74,460 in.lb. torque capacity to meet the crusher application
requirements.
• Spring-set, pneumatically released brakes
• Non-asbestos lining materials with large pad areas for maximum
heat dissipation
• Induction-hardened hub splines
LKB Brake

Mine Cone Crusher
Problem:
A major global mining equipment manufacturer needed a
replacement sheave for a cone crusher that broke down at a
customer’s mine. A gyrating, center-mounted spindle, powered
by a large, multi-groove V-belt drive, crushes the material
between a tapered mantle and concave walls.
Solution:
TB Wood’s was contacted by its distributor partner based on TB
Wood’s reputation as the “large sheave experts” and its history
of delivering in short time frames.
• A made-to-order (MTO) solution was manufactured to meet
the
unique sheave application requirements.
• The 35.5” dia., non-standard 14-groove sheave was cast using
ductile iron instead of standard gray iron due to high drive
speed.
• Sheave was manufactured in just five business days and
shipped in six business days from the initial order date.
Application Profile
MTO Sheave

Mine Sizer
Problem:
A large mining OEM needed a custom belted drive solution
for use on a line of mine sizers. The machines feature a pair
of cleated (toothed) rollers that crush material between them
to a specific size. The belted drive transfers power from the
motor/gearbox shaft to the crushing roller shaft.
Solution:
The OEM contacted TB Wood’s based on TB Wood’s reputation
as the “large sheave experts”. TB Wood’s designed and
manufactured Made-to-Order (MTO) sheaves to meet each
unique sizer application requirement.
• Custom sheaves had between 3 and 5 grooves in sizes from
14 in. to 28 in. diameters.
• Sheaves were cast using ductile iron and were dynamically
balanced at the factory
Application Profile
MTO Sheaves

Mine Sizers
Problem:
A major mining OEM required rugged fluid couplings for use
on a series of mine sizers. The top-fed machines utilize twin
toothed rollers that crush stone to a predetermined aggregate
size for construction customers. The couplings, mounted
between the drive motors and gearboxes, are needed to
protect the drivetrain during high-torque starts and jams.
Solution:
The ability to deliver reliable, smooth, soft starts on a variety
of mine sizers and feeder breakers made Mesur-Fil®
fluid
couplings from Wichita Clutch the ideal choice for this
high-inertia load application.
• Jam/overload protection
• Reduced power consumption
• No metal-to-metal contact
• All aluminum housings
• High-temperature Viton seals
Application Profile
Mesur-Fil®
Fluid Couplings

Portable Quarry and
Mining Screens
Problem:
A leading global manufacturer of portable vibrating screen
platforms used at mining operations, needed a robust coupling
that could withstand the screen’s high-frequency vibration. A
blind-fit coupling was required because the hydraulic motor and
vibratory screen shafts were enclosed in an adaptor housing.
Solution:
The OEM consulted with Guardian engineers after testing three
competitor coupling designs without success. Ultimately, the
Guardian Superflex coupling was selected due to it’s ability to
withstand the harsh environment and severe shock and
vibratory loading of the screen.
• Nominal torque capacity: 2,390 in.lbs. (6,549 in.lbs.)
• Super elastic flexible rubber element of 55° shore “A”
hardness
Application Profile
Superflex Couplings
Application Profile

Quarry Vibratory Screen
Problem:
A major global mining equipment manufacturer needed a
belted drive for a vibrating screen used at quarries and mines.
As material is fed into the top of the inclined machine, vibration
causes the material to move down as it drops through a series
of different screens with selected size mesh openings. The
vibration is generated by a large, unbalanced motor-driven
flywheel sheave that creates erratic movement when rotated.
Solution:
TB Wood’s manufactured Made-to-Order (MTO) sheaves to
meet the challenging sheave application requirements. The
rugged 20" dia., non-standard, deep-groove, gray iron sheaves
were statically balanced at the factory.
Application Profile
MTO Sheaves

Application Profile
Mine Feeder/Breaker
Problem:
A U.S. open pit coal mine operator needed a replacement
centrifugal clutch for its primary feeder breaker. The feeding
and crushing machine utilizes a “flight chain” that moves the
coal from a large tipped hopper into a rotating breaker head
that crushes the coal into various sizes. Positioned between
theelectric motor and gearbox on the rotating head drivetrain,
the clutch allows for some slippage to protect the drivetrain
against the damaging shock loads that can occur when large
coal pieces get temporarily jammed.
Solution:
Boston Gear recommended a 19 in. diameter Centric
Centrifugal Clutch (CCC). The clutch is designed to
automatically engage and disengage at customer specified
RPMs. The clutch also provides shock load protection during
machine start-up.
Centric®
Centrifugal Clutch

High Pressure Grinding Rolls
Problem:
Brunel Corporation, a global leader in torque-limiting
technologies, needed reliable power transmission components
for use in a custom gear Turning and Locking (TL) system for
FLSmidth, a leading manufacturer of High Pressure Grinding
Rolls (HPGR).
Solution:
To meet the application requirements, Twiflex supplied a TL
system comprised of a turning gear which engages with a
1,000 mm dia. solid steel gearwheel mounted on the output
flange of a Brunel torque limiter. The turning gear includes a
1.5 kW motor with a gearbox to produce a start-up (breakaway)
torque of 3,760 Nm and an output torque (continuous turning,
bi-directional) of 1,580 Nm at a nominal turning speed of
5.2 rpm. Safety element modules, based on the SE30 torque
elements from Bibby Turboflex were introduced by Brunel for
their JSE torque limiter.
Application Profile
Turning & Locking System with Torque Limiter

Stackers, Spreaders &
Excavators

Application Profile
Coal Mine Stacker
Problem:
A coal mine needed a new drive for the rope winch on its
stockyard stacker. Coal is fed into the rail-mounted machine
via a conveyor. A winch is used to draw the heavy-duty cable
(rope) from the drum and pull it through the machine’s
conveyor boom sheaves during routine rope replacement
operations. The speed reducer is positioned between the
electric drive motor and the winch cable drum.
Solution:
To meet the application requirements, Boston Gear
recommended a Series 2000 helical inline gear drive. The
double reduction model has a rugged cast iron housing and a
NEMA C-Face motor input with a 3-Jaw coupling.
• Steel-hardened, ground and polished helical gears
• Magnetic entrapment of metallic wear debris provides
maximum life
Series 2000 Inline Drive

Application Profile
Mine Spreader
Problem:
An open pit coal mine operator in the western US needed to
replace some of the brakes on its overburden spreader. The
massive machine features two large intake and discharge
conveyor booms along with a heavy counterweight boom. The
tracked spreader moves along the side of the dumping area as
it distributes the material uniformly from its discharge conveyor.
The spreader utilizes electric motors with brakes to drive the
hoist rope winch reels on each of the booms.
Solution:
Industrial Clutch LKB 325 spring-set, pneumatically released
brakes with 300,000 in.lb. torque capacity were an ideal solution
for the brake replacements. The brakes, positioned on the drive
end, opposite of the motor, provide high-energy emergency
stopping and static holding functionality.
• Non-asbestos lining materials with large pad areas for
maximum heat dissipation
LKB Brakes

Application Profile
Bucket Wheel Excavator
Problem:
A major European mine equipment manufacturer required a
backstopping clutch for a bucket wheel excavator used at an
open pit coal mine. The continuously rotating bucket wheel
removes overburden which is transferred to an onboard
inclined discharge conveyor that dumps the material onto an
overland conveyor for further transport to an overburden
spreader.
Solution:
A Stieber Model RSCI 260 clutch, with a torque capacity of
47,970 lb.ft. (65,000 Nm), was selected to meet the
requirements of this challenging application.
• External bearing-supported
• Centrifugal throwout (C/T) sprag type backstopping clutch
• Primary advantage of the C/T sprag retainer is that when the
sprags lift off the outer race, there is no rubbing contact in
the clutch.
RSCI Overrunning/Backstopping Clutch

Application Profile
Mine Sedimentation Tanks
Problem:
A leading water treatment OEM needed an overload clutch
solution for use on new sedimentation tanks for a mine in the
Western US. The circular tanks have a rake or scraper
arrangement at the bottom to remove sludge, and a skimmer
at the top to remove the scum. The scrapers and skimmers
rotate at very slow speeds and require an overload clutch to
prevent excessive torque from damaging the drive mechanism.
Solution:
Boston Gear provided Centric Model WOR-06 mechanical ball
detent overload release clutches with a maximum torque rating
of 8,000 lb.in. WOR Series clutches are specifically designed
to release the excess torque without breaking drive
components or creating an undesirable repair situation on
wastewater sedimentation tanks, clarifiers, scrapers, and bar
screens.
WOR Series Overload Clutches

Application Profile
Mine Sedimentation Tanks
Problem:
A mine operator in the Western US needed replacement
gearboxes for its sedimentation tank drives. The circular tanks
have a rake or scraper arrangement at the bottom to remove
sludge, and a skimmer at the top to remove the scum. The
scrapers and skimmers rotate continuously at very slow speeds.
Positioned above the center of the tank, the speed reducers are
mounted between the drive motor and the vertical
scraper/skimmer driveshaft that extends to the bottom of the
tank.
Solution:
Boston Gear supplied a triple reduction Model 2073 with a ratio
of 136:1 and a rated output torque exceeding 7,700 lb.in. The
unit features a coupling-style, NEMA C-Face motor input.
The new energy efficient units replaced worn worm gear
reducers.
Series 2000 Inline Drives

Mine Flotation Tank
Agitator Drives
Problem:
A major global mineral and metals processing equipment
OEM needed reliable belt drive solutions for its line of mining
flotation cells (tanks). The tanks are used to recover minerals
utilizing a flotation process.
Solution:
The OEM contacted TB Wood’s based on a long-term
relationship, and its reputation for quality and on-time delivery.
• 130 complete belt drive systems
• Hundreds of standard and Made-to-Order (MTO) sheaves
from 4.5" to 97" diameters
• 3- and 5-groove V-belt models
• Mated QD bushings included
• Multiple private-branded large MTO sheaves shipped to the
customer’s facility in Mexico on a tight timeline
• 97" MTO sheaves were delivered via a dedicated semi truck
Application Profile
MTO & Standard Sheaves

Mine Slurry Pumps
Problem:
A large pump OEM required a rugged belted drive solution
for slurry pumps used by a copper mine customer. The pumps
are used to transport slurry, comprised of ore and water,
through a pipeline. After reaching its destination, the ore is
separated from the water and the remaining water is treated
prior to release or reuse.
Solution:
Reliable TB Wood’s V-belt 8-groove sheaves were an ideal
solution for this tough mining application. A 53" diameter
sheave was mounted to the pump shaft and a mated
18" diameter sheave was mounted to the drive motor shaft.
• Ductile iron construction
• Motor sheaves were dynamically balanced at the factory
Application Profile
V-Belt Drives

Application Profile
Mine Water Pumps
Problem:
A global manufacturer of pumping systems needed a reliable
clutch solution for use on mine water pumps. The packaged
system consisted of six electric motor driven pumps connected
to a manifold to transport water at a copper mine.
Backstopping
clutches were required to prevent backflow when one or more
of the pumps were shut down. If left unprotected, water
backflow would drive the impeller and motor in the wrong
direction, causing significant powertrain damage when the
pumps were re-started.
Solution:
Formsprag provided ball bearing supported Model SB-600
backstopping clutches, designed specifically for pump
applications.
• 1600 lb.ft. (2176 Nm) torque capacity
• Compact length requiring only an additional 3.2 in. between
the motor and pump shaft
Model SB Backstopping Clutches

Application Profile
Mine HVAC System
Problem:
A global mine ventilation equipment manufacturer needed an
overload clutch solution for a large fan drive application. Fans
are used to drive fresh air into a downcast shaft while the large
diameter main fans draw out old air from the mine through an
upcast shaft. During a power failure, when the electric motor
shuts down, the clutch automatically engages the diesel engine
driveshaft connected to the fan to ensure that continuous air
flow into the mine is maintained.
Solution:
Boston Gear supplied 19 in. and 24 in. diameter Centric
Centrifugal Clutches (CCC) to meet the challenging OEM fan
drive application requirements.
• Dual-drive clutch application
• Automatic engagement and disengagement
• Protection against shock loads
Centric®
Centrifugal Clutch

Application Profile
Mine Ventilation Fan
Problem:
A major industrial fan manufacturer required a cost-effective
backstop for a vertical ventilation fan used at an underground
mine. The backstop is installed to prevent windmilling (rotation
in the wrong direction) due to air flow from the environment
while the fan is turned off. Significant damage to the motor and
drive belts can occur if the fan is windmilling during startup.
Solution:
A Formsprag Model LCB-200 fan backstop, with a torque
rating of 150 lb.ft. (200 Nm) and a speed range of 0-3600
RPM, was supplied for this 5 ft. blade dia. fan application.
• Stops fan windmilling, extends fan drive life
• Economical backstop design
• Self-actuated, no power or utility required
• Easy-to-install design requiring only 1.125" of shaft
engagement
LCB-200 Backstop

Mine Ventilation Fan
Problem:
A leading industrial fan OEM needed a reliable belted drive
solution for a large mine ventilation fan. The belted drive
transfers power from the electric motor to the fan shaft. The
massive fan, driven by a 30 HP electric motor operating at
1750 RPM, is positioned on the surface above the mine’s
ventilation shaft. The fan, operating at 350 RPM, moves fresh
air deep into the mine to reduce extremely high temperatures
and improve worker comfort.
Solution:
TB Wood’s supplied a complete belted drive system, including
a pair of 3-groove, cast iron V-belt sheaves. A 7.4 in. dia.
sheave was installed on the electric drive motor shaft. A larger
38 in. dia. sheave, weighing more than 130 lbs., was mounted
to the fan shaft.
• Sure-Grip QD type bushings were included for easy
installation and removal
Application Profile
V-Belt Sheaves

Mine Refrigeration
Compressor
Problem:
A major refrigeration system manufacturer required a custom
sheave solution for a large belt-driven mine refrigeration
compressor. The belted drive transfers power from the electric
motor to the compressor. The reciprocating compressor raises
the temperature of the refrigerant gas before it is pumped into
a condenser.
Solution:
TB Wood’s engineers designed a Made-to-Order (MTO)
solution that was manufactured to meet the challenging
application requirements. A new 40" dia., non-standard
5-groove, ductile iron flywheel sheave was cast and mounted
on the compressor shaft to accommodate the high inertia load
generated. A mated 16" dia. sheave was cast and installed on
the drive motor shaft.
Application Profile
MTO Sheaves

Application Profile
Copper Mine Process
Air Fan
Problem:
A leading fan and blower OEM required a clutch solution for
installation on a process air fan system at a copper mine. The
fan is used to exhaust the hot air generated from the
equipment in the ore processing facility. The motor driven fan
can reach temperatures in excess of 900° F (482° C). When
the fan’s main drive is shut down, the overrunning clutch
engages a smaller, secondary drivetrain that rotates the fan
very slowly during a cool down period. This prevents fan and
shaft damage caused by sagging and warping from the
excessive heat.
Solution:
A Formsprag Model FRB-700 clutch with a 5,700 lb.ft.
(3660 Nm) torque capacity met the customer’s overrunning
application requirements.
• FRB clutches feature a high-torque density and need no
adjustments or controls providing reduced operating costs
Model FRB Overrunning Clutch

Application Profile
Mine Process Blower
Problem:
A leading industrial fan OEM needed a backstopping clutch for
a process blower at a copper mine. The large squirrel cage fan
is used to exhaust heat generated inside the processing
plant at the mine. The backstopping clutch prevents
windmilling or reverse rotation when the fan is turned off. A fan
of this size rotating at just 3 RPM in the wrong direction could
cause
significant damage when the fan drive motor is started.
Solution:
A Formsprag Model HSB 700 clutch, with a torque capacity of
5,000 lb.ft. (6800 Nm), was installed. HSB Series high speed
clutches are intended for use as backstops on a wide range of
applications, including fans and conveyors.
• Comprised of an FSO clutch combined with an oil reservoir
• PCE®
sprags with Formchrome®
and Formsprag
“Free-action” retainers.
• The oil reservoir is an aluminum casting with cooling fins
Model HSB Backstopping Clutch

Application Profile
Continuous Miner
Problem:
A major mining equipment manufacturer required a centrifugal
clutch solution for a new continuous miner. The machine
utilizes a cutter head comprised of twin rotating heads lined
with projecting bits. The clutches are positioned between
the electric motor and gearbox on each of the two separate
head drivetrains. The clutches allow for some slippage to
protect the drivetrains against the damaging shock loads that
can occur when hard material is encountered.
Solution:
Working closely with the OEM, Boston Gear supplied a
16 in. diameter Centric Centrifugal Clutch (CCC) to meet the
challenging machine application requirements. Spring loaded
CCC units are designed to automatically engage and
disengage at customer specified RPMs.
Centric®
Centrifugal Clutch

Application Profile
Blast Hole Drill
Problem:
A large drilling and blasting contractor needed to replace a
brake on one of its larger rotary blast hole drills utilized in
mines and quarries. The brake is mounted to the main cable
pulldown winch drive motor that raises and lowers the heavy
drill head and pipe string sections on the drilling tower.
Solution:
To meet the emergency stop application requirements,
Industrial Clutch provided a 13" dia. LKB 208 replacement
spring-set, pneumatically released brake with a 9,565 in.lb.
torque capacity.
• High-energy metallic linings with large swept areas ensure
excellent heat dissipation, uniform stopping distances and
long lining life
• Induction-hardened hub splines
LKB Brakes

Mine Vehicles
Problem:
A mine operator needed drop-in brakes for use on their
underground mine cars. They were experiencing failures with
the existing brakes and wanted a more reliable solution that
could support a 4 & 5 bolt pattern and be repaired in the field.
This was important since the mine operates different size cars
with smaller hubs for different wheel sizes. The brakes are
mounted directly to the mine car’s differential.
Solution:
To meet the customer’s needs, Matrix engineers, together with
a distribution partner, provided a custom-designed hydraulic
wet brake that features an interchangeable wheel pattern that
accommodates either a 4 or 5 lug wheel mount. The new
pressure-operated brake design significantly reduced the
customer’s inventory requirements since it replaces two
different existing brakes. The brake design provides easy
access for “bleeding” and can be completely repaired on-site.
Application Profile
Custom Pressure-Operated Wet Brake

Platinum Mine Chair Lift
Problem:
A leading mine conveyor OEM required a reliable caliper
braking solution for a mine chair lift system installed at a South
African platinum mine. Driven by a 120 HP (90 kW) electric
motor, the chair lift system utilizes a series of individual seats
that are suspended from an overhead 26 mm (1 in.) dia. cable.
The cable lift system operates in a continuous loop to transport
up
to 900 miners per hour in and out of the mine shaft, including a
35 degree inclined passage.
Solution:
Svendborg Brakes supplied Model BSFI 360 spring-applied,
hydraulically-released brakes that provide 48,000 Nm
(35,403 lb.ft.) braking torque to meet the challenging mine
chair lift application requirements. A custom hydraulic power
unit, manufactured and tested in-house, was also included.
Application Profile
BSFI 300 Series Brakes
Application Profile

Application Profile
Mine Belt Filter Press
Problem:
A mine facility needed a reliable gearbox to replace a
competitor model that failed on its belt filter press. While
mud/slurry sewage from the mine is pumped into the press, the
liquid is filtered out under pressure through fabric membranes.
The remaining caked solid material is dumped as it exits the
machine. A synchronous belt drive is used to power the
continually-rotating filter membrane belts. The gearbox is
positioned between the 1 HP electric drive motor and the
belted drive sprocket shaft.
Solution:
Boston Gear provided a triple reduction Model 2073 inline
drive with a ratio of 136:1 and a rated output torque exceeding
7,700 lb.in. to meet the challenging slow speed application
requirements.
• Magnetic entrapment of metallic wear debris
Series 2000 Inline Drives

Mining & Aggregate Market Applications & Innovations

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