FR150 is a proven industry leading bearing material for semi-lubricated or fully-lubricated applications.
FR150 bearings are designed for heavy load carrying capability and cavitation resistance in high-pressure fluid conditions.
FR150 contain a steel-backing, sintered bronze inner structure with an unsurpassed fluoropolymer surface that provides engineered solutions in demanding applications.
FR160 Bearings: Engineered for specific market needs requiring lead-free materials.
FR160 is a proven material best suited for high-load, slow speed applications with boundary lubrication conditions.
This material is highly regarded in many automotive applications, fluid power applications involving cradle bearings, or thrust washers.
FR160 contains a steel-backing, sintered bronze inner structure with co-polymer anti-friction layer of PTFE, FEP + Tin Oxide and Carbon Fiber.
FR Technical Notes
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Specifications
All F-Series Bearings start with a steel backing for high mechanical strength, dimensional rigidity, and heat dissipation (A).
Next comes the strongest sintered bronze layer in the industry, key to bearing wear resistance (B).
Finally, there is the resin layer itself, impregnated into the interstices, in the sintered bronze (C).
The resin layer provides the anti-friction properties. |
A. Steel Backing
Generally a 1010 mild carbon steel, although stainless is also available.
For FB® bearings that may be exposed to the elements, a tin flash is added for corrosion resistance.
The thickness of the steel varies according to the size of the bearing.
B. Sintered Bronze Layer
Similar bearings on the market employ a copper coating on the steel back to enhance the attachment of the bronze during sintering.
While this makes for strong bond between those bronze particles that happen to be proximate to the steel,
it does nothing to enhance the bonds among the upper-most bronze particles, which are not sintered to the steel but rather to other bronze particles.
FB® & FR® bearings employ a state-of-the art high temperature sintering technology that makes for a rock-solid bronze layer from the steel all the way to the surface.
C. Resin Layer
Changes in the composition of the resin layer provide for the different properties of the various F-Series Bearings.
In most cases a PTFE-type resin is key, although it can be enhanced by stronger fluoropolymers and lead, or tin-lead, or other alloys.
Carbon fibers can also be used for lead-free bearings.
The sintered bronze/resin layer is generally 0.3mm (.012 inches) thick.
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FR® Bearings: For Semi-Lubricated to Fully Lubricated Applications
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Material |
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Max PV |
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Temperature
Range |
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Friction
coefficent |
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Max load
at V-0 |
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Uses |
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FR
(resin: PTFE
& FEP plus tin/lead) |
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5,000 kgf/cm2
(233,000 psi•pfm)
Semi-dry; Many millions under hydro-dynamic conditions |
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-50oC~280oC
(-58oF~536oF) |
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0.01~0.05 |
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1,400 kgf/cm2
(19,913 psi) |
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Gear pumps, vane pumps,
piston pumps, compressors,
shock absorbers, struts, forks |
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Other variations: FR® bearings are also available in a lead free version (FR150X3),
a super-low friction version (FR110), and a high cavitation resistant version (FR100).
FR® bushings can be made with grooves or holes to enhance oil flow.
As with FB® bearings, research on pushing the FR® performance envelope is ongoing,
and we encourage you to contact us for information regarding the latest technologies. |
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