We are the leading manufacturer, exporter and stockist of crane parts and control gear equipments. We have a well established presence in this sector and have been able to maintain.

3. ELECTRO HYDRAULIC THRUSTER BRAKES (MDT) INSTALLING BRAKE IN POSITION :
To insert the brake in position the brake shoes are to be taken
apart to clear the drum diameter. To do this, slacken the setting
bolts and the tie-rod nuts in the side arm and pull it slightly. This
will increase the distance between the brake shoes and the
brake can now be inserted on the foundation bolts and the shoes
can be positioned on the brake drum. Re-tighten the setting bolt
and the tie-rod nuts. Tighten the mounting bolts.
INSTALLING THRUSTER ON BRAKE :
E
The thruster to be filled with sufficient quantity of oil as mentioned
in the Thruster Table. To mount the thruster on the brake,
N
INTRODUCTION remove one side split pins on the thruster hinge pins of the brake
A
Thruster brake is a device to retard the speed of moving and the lever. Remove both pins and re-insert them after
machinery and to stop it accurately to the desired position. The positioning the thruster on the pin holes in the base and lever of
R
braking force is applied to the brake shoes by a pre-stressed the brake, Replace both split pins, Check that the thruster
C
compression spring. The shoes press on the rotating brake drum movement is unobstructed when the crank lever is pulled
retarding its speed, and finally stopping it. The releasing of the manually and the thrust rod of the thruster moves freely.
brake and compressing of the spring is done by thruster. Other Open the terminal box cover of the thruster and connect 3-
L
release devices like pneumatic cylinder or manual release phase, 415 Volts power supply cables to the three terminals on
O
arrangements can be offered on request. the terminal plate inside the terminal box. Terminate the earthing
lead on the earth terminal provided on the thruster or brake.
R
CONSTRUCTION AND OPERATION Replace the terminal box cover on the terminal box. The thruster
T
Thruster brake has a pair of cast iron shoes which are lined up is ready for operation.
with friction pads. The shoes are hinged on main arm and side
N
arm of the brake. Each of them have a hinge pin fitted in the base. ALIGNING AND SETTING OF BRAKE :
Next, align the brake shoes with the diameter and surface of the
O S
They are connected to each other on top by a tie rod, which is
hinged in the main arm and locked to the swivel block in the side brake drum and adjust the nuts on the tie-rod such that both
C T
arm, by a lock nut. shoes grip the brake drum equally. Energize the power cables.
this will cause the thrust rod of the thruster to move up and the
N
brake is released as the shoes release the brake drum. Adjust
A crank lever is hinged on the main arm. and the other end is fixed
E
the gap between the drum and shoes to 0.3 to 0.5 , equally by
to the top clevis of the thruster by a hinge pin. A brake spring, is
adjusting the setting bolts on both arms.
fixed on the main arm and is pre-loaded by a locknut on the lever,
PM
The pre-tension in this spring decides the braking torque. The
For equal and uniform liner wear it is necessary to ensure that the
thruster is fitted on the base by a hinge pin, When the thruster is shoes and the arms move equally. This is done automatically by
I
not energized, the brake shoes are pressed on the brake drum the ball on one arm and a matching vee on the other arm.
fitted on the drive motor shaft and hold it under the effect of
U
braking force provided by the spring. In such condition, the brake Technical Data :
Q
is applied, and the drum cannot rotate.
DRUM BRAKING
E
DIAMETER TORQUE
When the thruster motor is energized, the thrust provided by the 06 kgm
100 mm (4”) x 18 kg
thruster lifts up the crank lever which move the arms and the 150 mm (6”) x 18 kg 09 kgm
shoes away from the brake drum, there by releasing the braking 160 mm (6”) x 18 kg 09 kgm
force. The spring is compressed and braking energy is stored for 200 mm (8”) x 18 kg 020 kgm
the next cycle. 200 mm (8”) x 34 kg 032 kgm
250 mm (10”) x 18 kg 035 kgm
FOUNDATION 250 mm (10”) x 34 kg 042 kgm
To install the brake, the foundation must be made ready with 300 mm (12”) x 18 kg 042 kgm
tapped holes of proper size as per the dimensions mentioned in 300 mm (12”) x 34 kg 062 kgm
the dimension table. Care must be taken to ensure the center line 400 mm (16”) x 34 kg 090 kgm
of the brake coincides with the centerline of the brake drum and 400 mm (16”) x 68 kg 170 kgm
also the level of mounting pads “h” is matching with the center 500 mm (20”) x 46 kg 190 kgm
500 mm (20”) x 68 kg 290 kgm
600 mm (24”) x 114 kg 580 kgm
1

4. A.C. Electromagnetic Brakes
INTRODUCTION
A.C. Drum Brakes are suitable for signal phase A.C. supply up
to 440V and are available for drum diameters of 100 mm to 375
mm and Braking Torques up to 69 kg-m.
CONSTRUCTION AND WORKING :
The shoes are of graded cast iron. Other components are of
fabricated steel. The lever is hinged on the main arm. which is
connected to the side arm through a tie rod, and is stressed by a
E
pre-loaded compression spring. The compression of the spring
N
can be adjusted to set the braking torque to desired value. The
brake liners are of selected quality material and are riveted to the
A
shoes by aluminum rivets.
R
A.C. solenoid with laminated magnetic sheet steel houses a
C
copper magnetizing coil which is impregnated with Class F
materials. The plunger which is connected to the lever, is drawn
L
in to the coil, when it is energized with AC source. This loads the
spring and release the brakes shoes from the brake drum. When
O
the supply is cut off, the plunger is pulled out of the coil, and
R
spring force clamps the brake shoes on the brake drum and the
brake is applied.
FEATURES :
N T
1. The brake is Fail-safe. The brake is applied in absence of ADJUSTING BOLT
O S
A.C. Current and is released when the supply is restored.
C
2. High quality brake lining material ensures consistent braking
T
torque and reliable operation.
3. Clean environment working and less noise.
N
4. Braking torque can be adjusted easily and quickly.
Notes
1.
PM E
Brake type EMS 4 denotes A.C. single phase 4’ drum diameter ( inch series )
I
2. Brake type EMS 100 denotes A.C. single phase 100 mm drum diameter ( metric series )
3. Brakes are made to suit the required Drum Diameter.
U
4. Coils are rated for operation on single phase, 400/ 440V, 50 cycles,
Q
5. Coils can be supplies with ‘class B’ insulation.
6. Coil for higher ambient temperature upto 60°c can be offered on request,
E
7. Tolerance on indicated dimensions is± 2mm.
Dimensional Details
Brake Drum dia. Braking Torque
Type inch mm kg. M.
EMS - 4” EMS - 100 4 100 1.87
EMS - 6” EMS - 150 6 150 6.5
EMS - 8” EMS - 200 8 200 15
EMS - 10” EMS - 250 10 250 19.3
EMS - 12” EMS - 300 12 300 38.8
EMS - 15” EMS - 380 15 380 58.6
2

5. Electro-Hydraulic Thrusters (ST)
ELECTRICAL SUPPLY : INSTALLATION OF THRUSTERS :
Unless otherwise specified, all thrusters are suitable for All Thrusters are suitable for vertical mounting only. After filling
operation for 415 Volts,-phase, 50 Hz power supply. Thrusters the thruster with required quantity of oil, install it by using the
for other voltages up to 600 VAC, 3-phase can be supplied clevis and hinge pins provided. Insert the locking split pins.
against specific enquiries.
Ensure that no excessive transverse forces are acting on the
thrust rod. Wipe out the dust, paint or oil deposits from the
CONNECTIONS :
operating section of the thrust rod pins by dry and clean cloth.
The Thrusters operate equally well in both directions of rotation.
E
Therefore, the three phase supply lines can be connected the
MAINTENANCE :
Thrusters in any R-Y-B phase sequence. Provide adequate
N
The Thrusters is designed for long trouble free service. The
safety backups.
motor windings are designed to meet contingencies, The
A
bearings are adequately sized.
OIL REQUIREMENTS :
R
Thrusters are supplied without oil to avoid spillage during
C
Routine maintenance schedule includes checking the oil levels
transportation. They must be filled with sufficient quantity of oil and topping them if necessary. If oil contamination is detected,
before installation. For all models of thrusters, it is recommended drain it out completely and refill with fresh oil. Check and correct
L
to use Transformer Oil as specified in BS : 148.
T R O
CO N S
E N T
U I PM
EQTYPE
ST 520
RATED
THRUST
KGS. (N)
18 (180)
OUTPUT
STROKE
MM.
51
INPUT
WATTS
90
A
349
B
51
C
159
DIMENSIONS
19
D E
25
F
13
G
12.7
H
19
J
16
K
19
L
32
M
19
P
110 90
wt.
Q (kg.)
14
OIL
CAPACITY
LITERS
2.0
ST 535 34 (340) 150
444 171 22 29 14 19.7 21 27 41 25 138 118 30 2.5
ST 545 45 (450) 180
ST 870 68 (680) 200
76 508 76 216 25 32 16 22.2 25 24 29 48 32 152 132 40 4.5
ST 8110 114 (1140) 250
ST 13200 225 (2250) 420
127 660 127 254 32 38 19 25.4 30 27 45 54 38 152 132 55 9.0
ST 13300 295 (2950) 580
3

6. D.C. ELECTRO - MAGNETIC BRAKES
E
INTRODUCTION
N
Mill duty D.C. Electro-Magnetic Brakes are suitable for 220
Volts D.C. supply and are available for a drum diameters from
A
100mm to 800mm D.C. Electro-Magnetic brakes are used to
RECTIFIER CONTROL FOR D. C. BRAKES
R
retard or to stop moving loads or rotating masses and to
prevent damage to men and equipments.
C
INTRODUCTION
The coils of DC Electromagnetic brakes need DC supply for
FEATURES operation. DC rectifier panel converts AC mains supply to DC
L
1. Robust construction and simple design. output supply. Typical application examples are E.O.T. Cranes,
2. Reliable braking action. conveyors, rolling mills etc.
O
3. Efficient transmission of forces. Rectifier Panels are supplied with different combinations and can
R
4. Brakes shoes replacement without dismounting. be offered for feeding single or multiple brake coils.
5. Ease of maintenance.
T
6. Ease of torque adjustment. THE STANDARD PANELS
N
The standard Panels can be offered for
AIR GAP Single Brake operated individually. or
O S
The brake is released by powerful, short stoke electromagnet. Two Brakes operated individually, or,
C
The gap between the coil and the armature is to be maintained to Two Brakes operated simultaneously.
T
about 0.3 mm. Brake coil is encapsulated with epoxy resin and
is ‘Class F’ insulation.
N
CONSTRUCTION
E
Brake Rectifier Panel is a fabricated sheet enclosure and has two
TECHNICAL DATA sections, the top compartment is for resistor assembly and
Class of insulation of coil-’F’
M
bottom for controlling switch gear items like contractors, rectifier
Maximum operative voltage-660V bridges etc. The unit is designed for floor mounting. High quality
P
Rated supply-220V, D.C. rectifier has sufficient capacity to sustain over-voltage and
I
current transients. Wound Resistors have Nichrome / Eureka
SELECTION OF BRAKE SIZE
U
wires. The Contractors and Timers are of suitable ratings and are
Brake torque of 180 to 250% of motor rated torque is sufficient for from reputed manufacturers.
Q
normal applications like Cranes, Hoists and other material
handling equipments , For CT and LT drives , braking torque of
E
DEGREE OF PROTECTION
180 to 150% of motor rated torque will ensure braking without The standard enclosure for rectifier unit conforms to IP-54
excessive noise and mechanical jerk. degree of protection as per IS : 13947 (Part I ) - 1993.
Rated motor torque is given by The Resistor unit is IP 23.
716.2xHP 9.75xKW
Mb= T = OR
RPM RPM
FINISHING
Where , KW or HP is motor rated power and RPM is motor
Sheet steel enclosures are given metal treatment process for de-
rated speed in revolutions per minute.
rusting. de-greasing, and phosphating prior to two coats of
BRAKE DRUM Brake BRAKE DRUM Brake synthetic enamel paint.
DIA. Torque DIA. Torque
SIZE mm kg-m SIZE mm kg-m
DM 100 100 1.6 DM400 400 120
DM 150 150 10.0 DM500 500 190
VOLTAGE RATING
DM 160 160 10.0 Input - 415V AC Output - 220V DC (With economic resistor)
DM 200 200 12.5 DM600 600 355
DM 250 250 35 DM700 700 575
DM 300 300 50
DM 315 315 50 DM800 800 910
4

7. RESISTANCE BOXES (WIRE GRID & PUNCH GRID)
INTRODUCTION
Resistance boxes are used to add resistance in an electric motor
circuit for modifying the performance characteristic of Slip Ring
Electric Motors of EOT Cranes, Rubber Mills, Steel Rolling Mills,
Cement Plants, Power Plants, Conveyors, Coke Oven, Blowers
etc. for speed control and developing starting torque with low
starting currents. They are also used as Dynamic Breaking
Resistor for V.V.V.F.A.C. Drives, electric loading of AC
E
Altimeters, DC Generators and Dynamometers.
N
Resistors are designed to meet requirements of both A.C.& D.C.
A
Application.
R
TYPE OF RESISTORS :
C
The basic types of resistors are :
1. Stainless steel Wire Grid Resistors
L
2. Stainless Steel Punched Grid Resistors
3. Fecral Punched Grid Resisters
CURRENT RATINGS :
R O
Resistors are manufactured for current ratings from 10 to 800
T
Amps. Continuous duty resistors of higher ratings are made by
using two - or more parallel paths. Resistors with short time rating
N
up to 3000 Amps (or even higher), for neutral earthing are
O
possible for system voltage up to and above 11 KV.
C TS
STAINLESS STEEL WIRE GRID RESISTORS :
These resistors consist of stainless steel wires or strip in form of
N
grids. The current rating generally range from 7 Amps to 100
E
Amps for continuous duty applications with single or multiple
paths.
M
STAINLESS STEEL GRID RESISTORS :
P
Punched steel grid resistors consist of grids punched from
I
corrosion resisting nickel chromium alloy sheet steels. The
punched steel grids are completely immune to shock & vibration.
U
They function reliably under the worst operating conditions and
are particularly suited for steel mill duty. These resistors are
Q
available in wide range of current ratings from 8 Amps to 800
E
Amps for continuous duty with single or multiple parallel paths.
FEATURES :
1. Enclosure material - Galvanized Sheet Steel (Hotdip)
2. Mounting - Floor mounting
3. Degree of protection - IP - 21 / 22 / 23.
4. Current Rating (SS W-Grid) - 7 to 100 Amps Continues.
5. Current Rating (SS P-Grid) - 7 to 800 Amps, Continues.
6. Cooling - Air Cooled
7. Temperature rise - 2250 / 2500 / 3750 C
8. Cable Entry - Bottom
5

8. DIMENSION DETAILS OF RESISTANCE BOXES
S S PUNCHED GRID TYPE
S S WIRE GRID TYPE
N E
C R A
R O L
N T
O S
DIMENSION DETAILS OF PUNCHED GRID TYPE RESISTANCE BOXES
C T
E N
IPM
Q U
E
6

9. MASTER / CAM CONTROLLERS
INTRODUCTION
Master Controllers are used for remote operation of Contactors
in equipment such as E.O.T. Cranes & Rolling mills drives. The
Controllers are made in dust proof enclosure in IP-41 degree of
protection, up to 6 notches either side with maximum 24 contacts
as per desired sequence.
Spring return arrangement & Dead man’s handle arrangement
are also available.
E
GENERAL :
N
Master Controllers are of cam type where in contacts are
actuated by individual cams mounted on operated shaft.
C R A
The Shaft are cut accordingly to the type of sequence required by
the customers.
For this a blank sequence diagram can be provided by us to be
L
filled in by the customers.
O
CONSTRUCTION :
R
Master Controller is housed in enclosure and provided with an
T
easily removable cover with ample area for maintenance
N
The cam shaft is mounted on bearing bushes on walls of housing
O S
The cams are made of delrin material and fixed on square.
C
TECHNICAL DATA :
N T
E
Body Material - Sheet Steel ( POWDER COATED)
PM
Protection Degree - IP-41
I
Confirming to IS - 13947 (Part-1) 1993
U
Mounting Position - Horizontal / Vertical
Q
Contact Material - Silver Cadmium
E
Rated Voltage Insulation - 500 V. A.C
Thermal Test Current - 10 Amps.
Cable entries - 2x20Ø 2x2Ø standard conduit
Frequency of operation - 1000 switching per hour
No. of contacts - 24 maximum
No. of steps - 6-0-6 maximum
Optional - Spring return / Deadman’s
Handle arrangement
7

11. WORM DRIVE LIMIT SWITCHES (FG MODEL)
APPLICATION :
These Limit Switches are designed and manufactured according
to safety standard and are suitable for use on reversing drives,
such as Hoists, Crane, Winches, Rolling Mills, Coke Oven etc.
DESIGN :
The driving motion is transmitted by Worm Gear. All Gears and
Hub are made of low wear thermoplastic. The rotational
E
movements are transmitted to switches by adjustable cams.
N
DRIVING CAMS :
A
Each lever has a single micro matic register screw.
C R
R O L
N T
CO TS
TECHNICAL DATE :
E N
PM
Body Material - Black GFN
U I
Cover Material Yellow
Protection Degree
- Impact -Proof Thermo-plastic
- IP-55 (IS: 13947-(Part I)
Drive
EQ
Mounting Position
Gear ratios
Cable entries
- All Position Mounting
- 1:12.5, 1:25, 1:50, 1:100, 1:200 and 1:400
- Worm Screw
- Twin, 3/4 “BS conduit
DIMENSION ‘H’ :
FOR 2 CONTACTS - 84mm.
4 CONTACTS- 104 mm.
Mechanical Data :
Input speed - 1200 RPM, Maximum
Effective Useful 2 Contacts 4 Contacts
Ratio
Rotations Rotations Model Model
Contacts Material - Double break, Silver Cadmium
1:12.5 12 11.6 FG-12.5P4 FG-12.5P4
Wire Connection - Screw terminal contact 1:25 24.5 23.2 FG-25 P2 FG-25 P4
1:50 49 46.5 FG-50 P2 FG-50 P4
Rated Voltage - up to 500 V ac 1:100 98 93 FG-100 P2 FG-100 P4
1:200 196 185 FG-200 P2 FG-200 P4
Thermal Test Current - 10 A 1:400 392 372 FG-400 P2 FG-400 P4
9

12. ROTARY GEARED LIMIT SWITCHES (MODEL GRLS)
N E
C R A
INTRODUCTION :
R O L
Rotary Geared Limit Switch GRLS is used to trip supply when the
moving loads reach the extreme end positions of working zone.
N
OPERATION :
T
O S
A two (for more) Contact Elements are operated by respective
C
rotating Cams, suitable adjusted on a Cam Shaft which rotates
T
with fixed speed ratio of the drive motor shaft. The cams can be
N
suitably positioned so that they trip motor supply and stop the
motion at the required point of travel.
APPLICATION :
M E
IP
Rotary Geared limit Switches are suitable for use on reversing
U
drives such as Hoists, Winches, Rolling Mills and various other
mechanisms used in Steel Plants such as Coke Oven, Feeding
EQ
BODY MATERIAL
PROTECTION DEGREE
GEAR TATIO
DRIVE
MS Sheet ( Powder Coated )
IP-41 CONFIRMING TO IS-13947(PART)-1)1993
48 : 1
WORM DRIVE
60 : 1 96:1 Rotation
Effective
Rotations
Useful
Rotation
2 Contacts
Model
Contacts
Model
CABLE ENTRIES 2 X 3/4” CONDUIT 48 :1 42 40 GRLS/48/2SH GRLS/48/4SH
CONTACT MATERIAL SILVER CADMIUM
RATED VOLTAGE INSULATION 500 V.A.C.
60 :1 52 50 GRLS/60/2SH GRLS/60/4SH
THERMAL TEST CURRENT 10 Amps. / 40 Amps.
NO. OF CONTACT 2 NC OR 4 NC
96 :1 84 80 GRLS/96/2SH GRLS/96/4SH
CAM SETTING ADJUSTABLE
10

13. LEVER / COUNTER WEIGHT OPERATED LIMIT
SWITCHES
INTRODUCTION:
Lever ( and weight operated ) type Limit Switch LLS/CWLS
operates the control change-over Contacts of motor of an
moving equipment when a Cam moving with loads actuates the
Lever of limit switch. This turns the cams on a square shaft and
operates the NO / NC contact elements.
E
OPERATION :
N
Two or more Contact Elements are operated by respective
rotating Cams, which are suitably fixed on a square Cam Shaft
A
turned by a lever or weight. The contacts operate at 140 from
R
central neutral position.
C
DESIGN :
The Sheet Steel body, Lever and Cover of the Limit Switch are
L
finished by powder coating treatment. The Cam Shaft is mounted
in the housing on moulded Nylon bushes ( bearing) and are fixed
T R
TECHNICAL DATA :
Body material O powder coated sheet
N
Degree of protection IP- 41
O
Mounting position floor mounting
S
Cable Entries Twin. 3/4’ BS conduit
C T
No. of contact 2 / 3 / or 4
Wire Connection silver-cadmimum
N
Rated Voltage 500 V ac
E
Thermal Test Current 10 A
PM
OPERATING EXECUTIONS :
The operating mechanism can be offered in two executions:
U I
1. ROLLER OPERATING A LEVER :
These Limit Switches are used for E.O.T. Cranes, Wagon
Shunting devices, Elevators, Travel mechanism or such linearly
Q
moving mechanisms to prevent over-travel. The position of
E
operating lever is in up / down, and can be changed in steps of
0
90 at site.
2. LEVER ACTUATED BY A DEAD WEIGHT :
These Limit Switches are used to prevent over hoist motion with
weight. Counter weight is provided in this case. The same is lifted
with wire rope to prevent over hoist position.
11

14. RADIO REMOTE CONTROL INSULATED
CONDUCTOR
BAR
Durability, Reliability
N E Easy to use, Safe to operate
Rating : 60-400 Amps.
C R A
L
Economical, Safe to operate
O
Rating : 100-315 Amps.
T R User friendly, Easy to Install
CO N S
E N TFlexible push button layout
Rating : 60-150 Amps.
I PM
Compact, Choice of colour
Q U
E
Designed as per requirement
Rating : 500-1500 Amps.
Compatible with all CC models
Handy / Compact Transmitter
Rating : 75-90 Amps.
12