This is High torque heavy duty DC Gear Motor for bigger robots / motion systems. Drive shaft is supported from with metal bushes, it has sturdy design with gear box made to hold stall torque produced.
 
Specifications:
•     60 RPM 12V DC Motor With Gear Box.
•     Heavy Duty Metal Gears.
•     Shaft : 8 mm
•     Torque : 40 kgcm
•     Shaft diameter: 8mm
•     Shaft length: 17.5mm
•     Gear assembly: Spur
•     Weight : 400gm