piston pin

The piston pin of the Mercedes is of chrome nickel steel, and is retained in the piston by means of a set screw and cotter pin.

It is important that the bearing at the piston-pin be formed of two parts which can be adjusted to take up the wear.

This piston-pin setscrew construction had become a standard arrangement in automobile practice.

There were four grooves, three above the piston pin, and one below it.

There were four grooves, one above the piston pin, and three below it.