Overview Similar Products –> Product Description A.O. Smith Model RB3154AV1 Ball Bearing, Class “A” and “B” Insulation, Continuous Duty, Open Drip Proof, 40 C Ambient, 60 HZ, 1/4 thru 5 H.P. 1-1/2 HP 1725 RPM 208-230/460 Volts 5.0/2.5 Amps 1.15 service factor 56HZ Frame Auto Protector “B” Class Insulation 50/60 HZ 56HZ=7/8″ key x 2-5/16″ shaft 1.0 Service factor at 50 HZ Cross Reference: P56L4T11C40 P56M4T11 P56M4T11A1 P56M4T11A2 P56M4T11B1 P56M4T11B3 P56M4T11B4 P56M4T11C31 P56M4T8B1 P56M4T8B3 P56M4T8C30 P56N4T11C33 Product Videos Custom Field Product Reviews