In a message dated 11/27/00 7:33:00 AM Pacific Standard Time, tesla-at-pupman-dot-com writes: << Robin, A 1200 rpm motor uses 6 flats to make it synchronous. John Freau >> John, Andy, all, Is it safe to assume that the # of flats on the rotor is the quotient of 7200 and the motors synchronous RPMs? (3600 RPM = 2 flats, 1800 RPM = 4 flats, 1200 RPM = 6 flats, ect.) David Rieben