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-120059-169
Features:
Voltage: 6-12 V
Gear Ratio:169:1
Stall Torque: 37.6Kg.cm (12V)
Stall Current: 4.3A (12V)
No load Speed: 59rpm (12V)
No Load Current: 180mA (12V)
Rated torque:9.4Kg.cm (12V)
Rated Speed: 46rpm (12V)
Rated Current: 1.2A (12V)
Size: 37*80(gearhead length 22mm)
(data sheet download @12V 59rpm 169:1 motor)