The Johnson Geared motor is famous for its compact size and massive torque. A torque as much as x3 as compared to center shaft or side shaft geared motor, with an affordable price tag.
The motor comes with a metal gearbox and off centered shaft , also shaft has a metal bushing for wear resistance.
 
Applications:
Apart from robotic application they are also used in industrial applications, vending system, hygiene and cleaning industry, and household electric appliance.
 
Specifications:
18000 RPM Base Motor
Shaft Diameter – 6mm (with internal hole)
Shaft Length – 15 mm
Dimensions : Gearbox diameter – 37mm; Motor Diameter – 28.5 mm; Length (body only) – 63mm
Weight – 300 gms
Torque – 5kgcm to 20kgcm (depending on RPM)
Voltage – 6 to 24 (Nominal Voltage – 12v)
No-load current = 800 mA(Max), Load current = 9 A(Max)
 
Available in following RPM (at 12v):
30, 60, 100, 150, 200, 300, 500, 1000