This standard specifies the model, technical requirements, testing methods, inspection rules, marking, packaging, transportation and storage, installation, use and maintenance of micromotor commutator finishing machines (hereinafter referred to as finishing machines). This standard is applicable to finishing turning machines that use the outer circles of both ends of the V-shaped or U-shaped support shaft and the transmission belt friction drive device to turn the commutator with the outer diameter of the micromotor armature between φ20 mm and φ200 mm.