PTFE Slide Bearing selection & installation guide

PTFE SLIDE BEARINGS SELECTION GUIDE

  • Calculate the overall load of the structure as this will indicate the total area of the PTFE slide bearing required at an appropriate temperature and pressure
  • Consider the function and rigidity of the structure to determine the quantity and positions of the PTFE slide bearings.
  • Take account of any unusual conditions that will affect the PTFE slide bearings during operation, such as the temperature at the sliding interface, angular misalignment and the need for acoustic or vibration damping
  • The type of adhesive used is determined by the temperature range at which the PTFE slide bearings will be operating. We ask therefore that this information is specified on all enquiries
  • Determine the most suitable method of fixing the PTFE slide bearings to the installation
  • Consider the operating environment and select the type of steel for the backing plates accordingly

INSTALLATION OF SLIDE BEARINGS

PTFE slide bearings can be fixed to the installation by full welding, tack welding, mortar embedment or bolting. The appropriate slide bearing configuration should be selected to suit the method of installation. Care should be taken to adequately protect the surface of the PTFE during installation.

Take a look at the technical data below for reinforced and virgin PTFE used in our slide bearings. If you have any questions, please contact us

 

REINFORCED PTFE

VIRGIN PTFE

PRODUCT DESCRIPTION:

A reinforced PTFE material that has a low coefficient of friction, high creep resistance, high load bearing capacity and high wear resistance. Specifically developed for slide bearing and skidway applications.

A PTFE material that has a low coefficient of friction and high chemical inertness. Suitable for a very wide range of applications that require these characteristics.

MATERIALS OF CONSTRUCTION:

Polytetrafluoroethylene Functional Reinforcing Agents

Polytetrafluoroethylene

COLOUR:

Black

White

OPERATING TEMPERATURE RANGE (CONTINUOUS SERVICE):

-250°C  to +260°C

-250°C to +260°C

DEFORMATION UNDER LOAD, CD (BASED ON ASTM D621A):
24 hr @ 230C, 14 MPa 1.0% 24 hr @ 230C, 14 MPa 5.1%
1 hr @ 1500C, 5 MPa 2.1% 1  hr @ 1500C, 5 MPa 11.1%
Permanent 0.8% Permanent 7.0%

COMPRESSIVE STRENGTH (ASTM D695):

1% Strain

10.8 MPa (1560 psi)

1% Strain

4.0 MPa (580 psi)

5% Strain

30.0 MPa (4350 psi)

5% Strain

11.5 MPa (1670 psi)

0.2% Offset

18.2 MPa (2640 psi)

0.2% Offset

9.0 MPa (1300 psi)

MAXIMUM PRESSURE (P) NON-RECESSED DESIGN:

Up to 18 MPa

Up    to 6.9 MPa

MAXIMUM PRESSURE (P) RECESSED DESIGN:

Up to 50 MPa

Up    to 13.7 MPa

DRY COEFFICIENT OF FRICTION:

0.03 – 0.07

0.04    – 0.07

FLAMMABILITY (ASTM D635):

Self-Extinguishing

Self-Extinguishing

WATER ABSORPTION (ASTM D570):

0.0%

0.0%

 

HOW CAN WE HELP?

Get in touch with our team of experts to discuss your slide bearing project.