R 408.12353 Foot-operated pedals.

Rule 2353. (1) Mechanical pedal return springs shall be the compression type, operated on a rod or guided within a hole or tube. If operated on a rod, the inside diameter of the spring shall be no greater than the diameter of the rod, plus 1/8 inch. If guided within a hole or tube, the inside diameter of the hole or tube shall be no greater than the outside diameter of the spring coil, plus 1/8 inch. A spring, in its initial compressed position, shall be so wound that the space between coils is less than the diameter of the wire. (2) A pedal counterweight, if provided, shall have the path of the travel of the weight enclosed or guarded. (3) A mechanical foot pedal shall be securely mounted on a press leg where the pedal is an integral part of the press.