Steel Dragon Tools 87740 Motor & Gear Box fits RIDGID 300 Pipe Threading Machine Replaces RIDGID Part: 87740 (Motor and Gearbox) Replaces RIDGID 87740 3177 Motor 115V (RIDGID 3177 replaces RIDGID 3158 motor) 1/2 HP Universal Electric 115 volt 60 HZ Reversible Motor 38 RPM Replaces RIDGID 300 87740 115v Motor One (1) year warranty against manufacturer defects.