AST Bearings

The AST20 Series Bushings

AST20 - Steel Shell with POM Plastic Liner - Inch and Metric

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 0.30~0.50mm, 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 0.20-0.35mm, 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 0.002mm providing good corrosion resistance.

Features

Just like DX bushings, AST20 Series Bushings are suitable for rotary and oscillating movement, lower maintenance requirements due to the long re-lubrication intervals, lower wear, lower susceptibility to edge loading, no absorption of water and therefore no swelling, good dampening behaviors, and good resistance to shock loads.