All-purpose self-lubricated bearing optimized for a wide variety of
non-lubricated applications in automotive, industrial linkage, pivots, rotating and oscillating assemblies.
FB® is a steel-backed, sintered bronze-lined bushing coated with a
proprietary anti-friction polymer. As a result, FB® accepts PVs up to 140,000 psi*fpm with no need for lubrication.
FB® is available in standard diameter sizes ranging from 5 mm to 165 mm in its standard format;
4.6 mm to 65 mm standard diameter sizes in flanged format;
8 mm to 52 mm standard inside diameter sizes in thrust washers. Custom options are always available.
FB Technical Notes
|
 |
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.
|
FB® Bearings: For Dry Applications
|
Material |
|
|
Max PV |
|
|
Temperature
Range |
|
|
Friction
coefficent |
|
|
Max load
at V-0 |
|
|
Uses |
|
|
|
|
|
FB
(resin: PTFE
& Lead oxide) |
|
|
3,000 kgf/cm2
(140,000 psi•pfm)
Completely Dry |
|
|
-200oC~280oC
(-328oF~536oF) |
|
|
0.04~0.18 |
|
|
1,500 kgf/cm2
(21,335 psi) |
|
|
The premium dry bearing for automotive and industrial uses:
linkages, pivots, swivels,
dry rotation and oscillation |
|
|
|
|
|
|
|
|
|
|
|
Other variations: FB® bearings can be made with a stainless rather than a mild carbon steel backing.
A lead free version of FB® is available that employs carbon fiber technology in the resin rather than lead oxide.
In addition, research on FB-types with even greater PV capacities is ongoing,
and we encourage you to contact our engineering or sales departments to learn of new products that may meet your needs. |
|
|
|
|
|
|
