3 HP 3450 RPM 56 Frame 208-230V Air Compressor Motor - Century # CP1302L 3 HP 3450 RPM, 13.1/12.3 amp; 208-230V 60hz.; Reversible. Open Drip Proof - Ball Bearings - Service Factor 1.0 Manual Overload Protection NEMA 56 Frame - Flat Rigid base mount Shaft: 5/8" diameter x 1 7/8"