Baldor Electric 407B 1Hp Single Phase Bufferw/Switch WBaldor 407B Additional Information ManufacturerBaldor Nameplate Output1 Number of Poles4 Phase1 MultiplierG1 Shaft Diameter (In.)0. 875 Speed 1800 RPM Product Style BUFFER Wheel Bore Size (In.)0. 75 Wheel Diameter(In.)8 Wheel Face(.)1 Starting Method Full Voltage Frame250 Output @ Frequency 55. 00 KW @ 50 HZ Synchronous Speed @ Frequency 1500 RPM @ 50 HZ Voltage @ Frequency 400 V @ 50 HZ