Main Menu


Request A Quote Contact Us

Your browser is out of date.

You are currently using Internet Explorer 7/8/9, which is not supported by our site. For the best experience, please use one of the latest browsers.

Composite Self-Lubricating Bushings

AST40 Steel Bronze with PTFE/Fibre Series - Metric

The AST40 Series Bushings are made of Steel bronze powder with PTFE/fiber, are dry bushings, and have the following layers:

  1. PTFE polymer fibers mixture 0.01~0.03mm are lead-free providing an excellent initial transfer film, which effectively coats the mating surface of the bushing assembly, forming an oxide type solid lubricant film.
  2. Sintered bronze powder 0.20-0.35mm, providing maximum thermal conductivity away from the bushing surface, also serves as a reservoir for the PTFE mixture.
  3. Steel backing, provides high load carrying capacity, excellent heat dissipation.
  4. Copper/Tin plating 0.002mm, provides good corrosion resistance
AST40 steel bronze bushings

Bearings Catalog

Check out our online product catalog with more than 10,000 products with full specifications & 3D CAD Models available for download - all free of charge!

AST40 Series Features

Suitable for dry running, low coefficient of friction, lower wear, good sliding characteristics, forming a transfer film can protect the mating metal surface, suitable for rotary and oscillating movement. The AST40 Series’ also has high chemical resistance and low absorption of water (swelling).

Typical Applications for the AST40 Series

The AST40 Series was developed for high duty, oil lubricated, hydraulic applications and is designed for use mainly under lubricated lubrications, shows excellent wear resistance, and has a low static and dynamic friction coefficient. Accordingly, it is especially good for use in automotive suspension struts, shock absorbers guide bushing, hydraulic cylinders, gear pumps and motors and axial and radial piston pumps and motors

With over 250 products to choose from, the AST40 Series bushings are further sub-categorized by the following:

  • AST40 Series – Straight Bushings
  • AST40-F Series – Flanged Bushings
  • AST40-WC Series – Thrust Washer Bushings
  • AST40-SP Series – Strip Bushings

AST Bearings is proudly presenting our new certificates for both the NJ and CA locations: AST Bearings’ ISO 9001:2015 Certificates

To learn more about what the ISO 9001 standard is, the differences between the 2015 and 2008 versions, and how AST verifies customer satisfaction: Learn About AST Bearings’ certification to ISO 9001:2015

Need Assistance Selecting the Proper AST40 Steel Bronze with PTFE/Fibre Series?

If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from AST as part of our value-added services designed to make your job easier.

Value added services

Ask A Question

Ask us a question and one of our team members will respond as soon as possible.
Fields marked with * are required.