The 37mm gearmotors are widely used on Intelligent robots,intelligent manipulators, intelligent furnitures, Intelligent focusing systems etc. Those are incredibly tough and feature full metal gears. Have gear ratio 6.3:1 to 810:1,1600rpm~12rpm, stall torque1.8~140Kg.cm
Type: MG37D-120178-56
Features:
Voltage: 6-12 V
Gear Ratio:56:1
Stall Torque: 13.6Kg.cm (12V)
Stall Current: 4.3A (12V)
No load Speed: 178rpm (12V)
No Load Current: 180mA (12V)
Rated torque:3.4Kg.cm (12V)
Rated Speed: 137rpm (12V)
Rated Current: 1.2A (12V)
Size: 37*80(gearhead length 22mm)
(data sheet download @12V 178rpm 56:1 motor)