Metric Series Metric Series 3 Millimeter (mm) Nominal Strip Width (Ws) Strip AST20 Steel Shell Plain Bushing with Polyoxymethylene (POM) Plastic Liner

The AST20 Series Bushings from AST® are very similar to DX® brand bushings in structure and are often substituted for DX bushings providing better value. The AST20 Series Bushings are made of steel bronze powder with POM and have the following layers:

1. POM 0.30~0.50 mm, has high wear resistance and low friction even only minute quantities of lubricant are supplied, this bushing surface carries a pattern of circular indents which should be filled with grease on assembly of the bushing.
2. Sintered bronze powder 0.20-0.35 mm, provides max. thermal conductivity away from the bushing surface, also serves as a reservoir for the resin mixture.
3. Low-carbon steel, gives exceptionally high load carrying capacity, excellent heat dissipation.
4. Copper plating 0.002 mm providing good corrosion resistance.