Innovation Beyond Metals ™


What is a composite bearing?

Polygon's bearings feature three distinct components:

  • Continuous glass fibers
  • Polymer resin
  • PTFE fabric liners

The fiberglass filament and epoxy resin combined form a very high strength backing. This precisely wound fiberglass structure allows for thin walled bearings (1/16" to 1/8"), reducing the size and weight of assemblies.

Composite Bushing and PTFE Liner Illustration


PTFE liners provide permanent lubrication unlike sintered metals which lose oils over time. Secondary lubrication is not necessary during start-up due to PTFE film transfer to the shaft.

Long life cycle

Testing shows wear under 0.006" after 1.6 million cycles, made possible by a woven structure of PTFE super-filaments with tensile strengths twenty times greater than PTFE resins. As a result, the bearing resists cold flow under high loads.

Handles industrial-level strain

PolyLube composite bearings support a load of up to 30,000 PSI while handling high radial and axial stresses. They resist high shock loading and impact fatigue due to their unique high strength continuous fiberglass backing. PolyLube bearings are ideal for high load operation in rotational and linear movements as well as in oscillation.

Exceptional dimensional stability

They exhibit high performance predictability over wide temperature ranges (+500 to -325°F).

Singular focus

Composite products are not our sideline; it is our profession. We engineer, design, manufacture, and test composite bearings and wear materials. We offer high temperature, high impact, food grade, insulating, corrosion resistant and numerous other specialty composite bearings.

Compare Bearings

Material Max. Dynamic Capacity-PSI
(less than 5 SFPM)
Maximum Temp. °F Thermal Expansion
10-6 In./In./°F
Specific Gravity
PolyLube® 30,000 500 4.8 1.87
Cast Bronze 6,000* 160* 10 8.8
Porous Bronze 4,000** 160** 10 7.5
Alloyed Bronze 10,000* 200* 16 8.1
Steel-Backed Bronze 3,500* 200* 8 8.0
Hardened Steel 40,000* 200* 7 7.9
Zinc Aluminum 5,500* 200* 15 5.0
Fabric-Reinforced Phenolic 6,000* 200* 20 1.6
Reinforced DuPont™ Teflon 2,000 500 55 2.0
*with lubrication
**oil impregnated


Any ratings are typical for design purposes. Final testing and approval is the customer's responsibility for their application. This information is derived from our testing and published data. There is no assurance of these properties, or warranty provided that these products are suitable for any particular purpose or operational situation.

Polygon certifies that their product will be free from material defect. Polygon will not accept any liability for loss, damages, or costs from use or misuse of our products.

Specifications are subject to change, and may be affected by our continual process of improvement. Changes may be made without prior announcement.