The document discusses CG-1 hydrodynamic bearings produced by HTB corporation. The bearings can operate continuously at temperatures up to 400°F without external cooling, unlike traditional bearings that require cooling below 200°F. The CG-1 bearings use modern materials like high temperature polymers instead of babbitt metals, can improve strength and efficiency over traditional designs, and reduce costs by eliminating external cooling needs.

1. CG-1 Hydrodynamic
Bearings
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2. When Babbitt metal lined hydrodynamic bearings came into existence in the 1800s, designers knew that the
limiting factor of their design was due to materials. The metals and lubricants of the day limited the safe
operation of the bearings to around 200 F. The designs and parameters of the 1800s have languished
without innovation, despite huge leaps made in engineering technology.
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3. Old Concept Re-Invent Manufacture
HTB corporation has taken the successful aspects of the traditional sleeve oil bearing,
such as ring oil lubrication and self-aligning capability, and eliminated its weakness
through modern materials, lubricants and engineering analysis.
By eliminating the use of Babbitt metals, conventional lubricants, and low strength
materials, the CG-1 hydrodynamic bearing can operate continuously at temperatures of
400 ⁰F. This eliminates the need for external cooling, improves overall strength, and
enhances mechanical precision.
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4. Every bearing that is manufactured by HTB has been engineered for the customer’s application. Our
proprietary design tool, allows for rapid evaluation of the exact specifications needed to ensure optimum
performance.
Our analytics package uses proven fluid dynamic methods combined with experimental data. The result is
predictable performance for every application.
•Minimum oil film thickness •Running clearance
•Damping and stiffness coefficients •Lubricant
•Estimated bearing critical speed •Design load
•Estimated operating temperature •Design speed
•Journal load angle
•Energy dissipation
5
6
4 10
6 4
3 10
6 3
2 10
0.01
6
1 10 2
0
1
0 0
1 -6 -4 -2 2 4 6
-0.01
2
3
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5. Dodge RTL SleeveOil Bearing: CG-1 Hydrodynamic Bearing:
Liner: Babbitt Metal , PV=18,000 Liner: High Temperature Polymer, PV=300,000
Liner Core: 10 Ksi Cast bronze Liner Core: 60 Ksi Ductile Iron
Housing: 20 ksi cast gray iron Housing: 40 ksi cast gray iron
Maximum safe operating temperature: 212 F Maximum safe operating temperature: 400 F
External water supply for cooling required: Yes External water supply for cooling required : No
Mass For Typical 3-7/16” Pillow block: 255 lbs Mass For Typical 3-7/16” Pillow block: 180 lbs
Overall Bearing Length: 10.00 inches Overall Bearing Length: 10.00 inches
Self aligning bearing: Yes Self aligning bearing: Yes
Bearing Seat: 180 Degrees Bearing Seat: 360 Degrees
Expansion/Thrust take-up: Yes Expansion/Thrust take-up: Yes
Ring or Circulated Oil: Yes Ring or Circulated Oil: Yes
Customer Bearing Sizing Software: Yes Customer Bearing Sizing Software: Yes
Accessories Available: Yes Accessories Available: Yes
The CG-1bearing saves thousands of dollars during construction and over its lifetime by safely running hotter.
This eliminates the need for external cooling lines, radiators, or chillers and gives the OEM the ability to reduce shaft
diameters. The bearing has fewer parts, and is mechanically tougher, making installation and service requirements less
intensive.
Our liner is20x more resistant than standard Babbitt metal to liner wipe failure based on taber abrasion tests. It
obtains a much higher surface finish than Babbitt, reducing the risk of surface asperity contact in the event of oil supply
interruption. Our liner surface is durable, strong and will not damage the shaft.
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6. General operating window for standard CG-1 bearing with General operating window for standard
internal ring oil lubrication system. CG-1 Bumper thrust take-up
Shaft Size Low Load Condition High Load Condition High Speed Condition Shaft Size Max Thrust Load Min Radial Load
3 7/16 300 RPM/2300 lbs 2600 RPM/4330 lbs 3000 RPM/3600 lbs 3 7/16 2500 lbs 600 lbs
3 15/16 300 RPM/3940 lbs 2200 RPM/5610 lbs 2600 RPM/4790 lbs 3 15/16 3100 lbs 790 lbs
4 7/16 300 RPM/5280lbs 2000 RPM/7350 lbs 2600 RPM/5440 lbs 4 7/16 3600 lbs 1000 lbs
4 15/16 300 RPM/7350 lbs 1600 RPM/9350 lbs 2200 RPM/6600 lbs 4 15/16 4500 lbs 1230 lbs
5 7/16 300 RPM/9600 lbs 1500 RPM/12000 lbs 2000 RPM/8310 lbs 5 7/16 5000 lbs 1500 lbs
6 300 RPM/17000 lbs 1200 RPM/17700 lbs 1800 RPM/12200 lbs 6 6500 lbs 1800 lbs
General operating window for standard CG-1 bearing with external circulated oil
lubrication system.
The capacity chart shown
Shaft Size Low Load Condition High Load Condition High Speed Condition Oil Flow Rate (GPM) represents typical application
3 7/16 200 RPM/1580 lbs 5000 RPM/7460 lbs 5000 RPM/7460 lbs 2.25 ranges. The bearing is
3 15/16 200 RPM/2080 lbs 4000 RPM/10300 lbs 4500 RPM/9120 lbs 2.5 capable of operating under a
4 7/16 200 RPM/2700 lbs 3500 RPM/12800 lbs 4000 RPM/11800 lbs 2.75 broad array of challenging
4 15/16 200 RPM/4600 lbs 3000 RPM/16300 lbs 3500 RPM/15300 lbs 3 parameters when proper
5 7/16 200 RPM/5800 lbs 2500 RPM/19500 lbs 3000 RPM/18600 lbs 3.25 allowance is made during the
6 200 RPM/6000 lbs 1200 RPM/20200 lbs 2500 RPM/13800 lbs 4.5 specification phase.
All CG-1 bearings offer a standard Dodge RTL series dimensions on shaft centerline, bore length, diameter, and
expansion bearing width and diameter. The bearings feature a fully split design, multiple ports pre-tapped for
thermal probes, oil system adapters, and sensors. Our bearings do not require any form of external supplies, such
as electricity or water supply. They come standard with high temperature contact seals and oil ring lubrication.
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7. •Elimination of external cooling lines and associated hardware
•Green Technology: Zero water consumption and waste stream
•Fewer parts and resource requirements improve system reliability
•Can be used in high temperature applications that previously required roller
bearings
•Utilizes lubricants engineered for long life
By eliminating the external water supply for a single typical Babbitt 3-7/16” bearing flowing water at the
recommended rate of 3.5 GPM, our bearing will save an annual cost of $2578/year of operation. Furthermore
this will proportionally reduce the volume of liquid entering the local MSD, improving the waste water output
of the location.
Our water cost estimate is based on the international and domestic industrial water cost pricing provided by the Organization for Economic Co-operation and
Development, the average cost per cubic meter of water in the US is $0.37.
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8. •Production:100% designed, manufactured and inspected in the
United States.
•Materials: Made from domestic cast iron and alloy steel
•Quality: All components are manufactured on multi axis CNC’s,
from high strength materials, and inspected during and after
production.
•Delivery: MTO standard lead time of 8-10 Weeks
•Price: Pricing is comparable to the Dodge RTL Sleeve Oil
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9. High Temp Bearings Inc.
www.hightempbearings.com
sales@hightempbearings.com
Main Office: 513-608-6165
Sales: 334-799-5890
The patent pending USPO # 61/346620, the CG-1 Bearing
performs under the same conditions as the Dodge RTL SleeveOil,
but without the use of external cooling.
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