bearings

KEY FEATURES

Singular Focus

Polygon engineers, designs, manufactures, and tests all our composite bearings and wear materials.

Greaseless

No Grease Gun
  • No grease means no greasing failures.
  • No grease means no missed greasing schedules.
  • No need for grease flushing.
  • Your customers save hundreds of labor hours by eliminating greasing time.

Grease traps dirt

Resists dirt mud boots
  • Grease traps dirt, which grinds the pin and bore.
  • PolyLube does not trap dirt, so it can exit the bore.
  • Can be run without seals in some lightly contaminated environments.
  • Proven record in construction and agriculture applications.

Simple assemblies lower costs

Reduce TCO penny chart
  • No need for grease zerks or their machining.
  • Greasing requires extra machining though bores or pins.
  • Zerk nipples and other part costs are eliminated.
  • Seals and their machining may be eliminated.
  • Through-pin greasing can be eliminated.

Press fit

image 17318
  • No retaining rings needed.
  • Reduce ring costs and ring groove machining.
  • PolyLube has excellent interference fit because the OD is high friction. Only the ID bore surface contains lubricants.

Corrosion resistant

no rust
  • No metal to rust or corrode.
  • Excellent for use in submerged applications, including seawater.
  • Resists a wide range of caustic conditions.
  • Greaseless operation means no mixed lubricants or water contamination from leaked lubricants.

Dimensionally stable

Dimensionally Stable drawing
  • Barely affected by temperature and moisture conditions.
  • From the tropics to the Arctic, you won’t have worry about thermal expansion.
  • PolyLube materials are not prone to water absorption and swelling like thermoplastic bearings.

Reduces total cost of operation

Reduce TCO penny chart
  • Engineering gets simple assemblies and less machining cost/time
  • Customer service and accounting gets reduced greasing warranty claims.
  • Your customer gets less greasing time and the labor costs to perform it.

WHAT IS A COMPOSITE BEARING?

PTFE Bearing CUTAWAY TN

Polygon's bearings feature three distinct components:

  • Continuous glass fibers
  • Polymer resin
  • PTFE 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.

six bearings

POLYGON COMPOSITE BEARING SPECIFICATIONS

  Imperial Metric
Ultimate compression strength 70,000 PSI 483 MPa
Unit load limit 30,000 PSI 207 MPa
Temperature range

-325 to 475°F

-163-260ºC
Coefficient of thermal expansion 4.8 x 10-6 in/in/°F (8.6-12.6) x 10-6 m/mºC
Thermal conductivity 1.8-2.3 (BTU*in(hr*ft2*°F)) 0.26 - 0.33 W/m*ºK
Water absorption (2 hours) 0.12% 0.12%
Water absorption (24 hours) 0.16% 0.16%
Specific gravity 1.87 - 1.95 1.87 - 1.95
Maximum Velocity 10 SFM 0.05 - 0.41 m/s

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