(1) The cutting head of each wood shaper, hand feed panel raiser, or other similar machine not automatically fed, must be guarded with a cage or pulley guard or other device so designed as to keep the operator's hands away from the cutting edge. In no case will a warning device of leather or other material attached to the spindle be acceptable. Cylindrical heads must be used wherever the nature of the work permits. The diameter of circular shaper guards must be not less than the greatest diameter of the cutter.

(2) All double spindle shapers must be provided with a spindle starting and stopping device for each spindle or provision must be made that only one spindle operate at any one time.