Specifications: Voltage:DC 12V Reduction ratio:2000 Maximum no-load speed:1RPM No-load current:0.05A Rated torque:30kg.cm Rated current:0.25A Rated input power:8W Ultimate load torque:50kg.cm Maximum load current:1A Motor Size: D Shaped Output Shaft Size: 8*16mm (0.31" x 0.63") (D*L) Gearbox Size: 58 x 40 x 27mm (2.28" x 1.57" x 1.06") (L*W*H) Motor Size: 31 x 57mm (1.22" x 2.24") (D*L) Mounting Hole Size: M4 (not included) Main Material: Metal, Electronic component Packages:1 x Worm Gear Motor Attention: 1.The motor must not be overloaded/blocked for use, otherwise it will burn the motor or gear set. 2.The torque of the geared motor is equally determined by the reduction ratio. The higher the reduction ratio, the higher the torque. Applications: automatic mahjong machines, vending machines, medical equipment, ATMs, robots, parking locks, electronic locks, smart home, automation industry, automotive parts, office automation, curtain machines, etc.