*An alternative economic version of High torque motor available: 

Johnson High Torque DC Geared Motor 100RPM 

100RPM 12V DC geared motors for robotics applications. It gives a massive torque of 27Kgcm. The motor comes with metal gearbox and off-centered shaft. 

Features

• 100RPM 12V DC motors with Metal Gearbox and Metal Gears 
• 18000 RPM base motor
• 6mm Dia shaft with M3 thread hole 
• Gearbox diameter 37 mm.
• Motor Diameter 28.5 mm
• Length 63 mm without shaft
• Shaft length 30mm
• 180gm weight
• 27kgcm Holding Torque
• No-load current = 800 mA, Load current = upto 7.5 A(Max)
• Recommended to be used with DC Motor Driver 20A or Dual DC Motor Driver 20A 

BUY A MOTOR WITH ENCODER

Datasheet

RMCS-2304 Datasheet
Mechanical Drawing