Steel Dragon Tools 87740 Motor Model 3177 fits RIDGID 300 Pipe Threading Machine Motor: 1/2 HP, 115 V, 60 Hz, 38 RPM, Reversible Universal Electric Motor Fits RIDGID 300 and 300 Compact Pipe Threaders. RIDGID Motor 3158 was replaced by RIDGID Motor 3177. Fits RIDGID Part: 87740 One (1) year warranty against manufacturer defects.