NBS Source
Fabreeka® - PTFE Bearing Pad

Application

Fabreeka-PTFE bearing pads are used for conditions where it is necessary to accommodate lateral movement (expansion). The PTFE provides a low friction sliding surface on the Fabreeka bearing pad, which distributes high compressive loads and accommodates rotations. In a structural bearing design, polished stainless steel is typically used as the smooth surface that the PTFE slides against.

Description

Fabreeka-PTFE bearing pads are manufactured using Fabreeka pad material with a Teflon® (PTFE) surface. The virgin Teflon is heat cured to the Fabreeka pad using a rigid, laminated thermoplastic (LTP). The rigid LTP layer prevents the PTFE from expanding/flowing under compressive load and rotation (also known as “cold flow”), as the bearing pad compresses.


Features and benefits:

  • Commonly used in structural expansion bearings and pipe slides.
  • Bearing pad meets AASHTO 18.4.9.1, MIL-C-882 and most state DOT specifications.
  • PTFE (Teflon) surface provides low friction for expansion.
  • Accommodates lateral movement and rotation.
  • Allows for rotations up to 0.02 radians under high pressure.

General information

Color

Grey

Material

PTFE

Manufactured using Fabreeka pad material with a Teflon® (PTFE) surface. The virgin Teflon is heat cured to the Fabreeka pad using a rigid, laminated thermoplastic (LTP).

Fabric reinforced elastomer

Fabric reinforced elastomer bonded to PTFE.

Uniclass

Pr_20_85_85_80 Sliding surface bearingsPrimary

CAWS

E40/445 Insulating load transfer systems

E40/445 Insulating load transfer systems

E40/440 Load transfer systems

Specification data - Sliding surface bearings Enhanced data

Load capacity (maximum)

10 000 psi.

The pads shall withstand compressive loads perpendicular to the plane of laminations of not less than 10,000 psi before breakdown.

Allowable movement of sliding bearings

0.02 SI.

Accommodates lateral movement and rotation.

Allows for rotations up to 0.02 radians under high pressure.

Execution

Installing sliding surface bearings.

Product Reference

Fabreeka®- PTFE Bearing Pad

Hardness

At 78°.

50–65.

ASTM D2240 50-65 Durometer D.

TensileStrength

Minimum.

2800 psi.

ASTM D4894/4895.

Elongation

Minimum.

200%.

ASTM D4894/4895.

Deformation capability

Deformation under Load - Maximum.

4%.

ASTM D621 4% (max) 78°F - 2,000 psi (1/2” x 1/2” x 1/32”).

Specific gravity

2.14–2.21.

ASTM D792.

Thickness

3.1 mm.

3.9 mm.

4.7 mm.

5.5 mm.

6.3 mm.

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Literature

Fabreeka-PTFE-Pad-0714_0119

Fabreeka-PTFE-Pad-0714_0119

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