Armatures .007 .018 .018 .181 Inertia–WR2 Arm. Hub .002 .003 .003 .021 Shaft .001 .002 .002 .017 Weight (lbs) 4.9 5.2 5.2 15.2 NEMA Frame Size 56C/48Y* 56C/48Y** 182C/143TC 184C/145TC 213C/182TC 215C/184TC For NEMA standard frame sizes, see page 137. Warner Electric...