Glossary “A-arm” Definition:
A triangle-shaped suspension control-arm device, with two points connected to the chassis and one to the wheel spindle. Control arms are sometimes called A-arms because from the top view, they are shaped like the letter A. Also referred to as A-frame.
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A-cam
Glossary “A-cam” Definition:
Pattern used for grinding pistons in an oval- or cam-shape with 0.005 inch (0.127mm) difference between the thrust face and the pinhole side.