if u go to jaycar try part numbers
yg2732 12V, 2.1kg/cm Torque
This compact unit will give a massive 2.1 kg/cm of torque at 70 RPM. Current draw rises to a modest 390 MA.
SPECS:
• Torque: 2.1kg/cm
• Rated Voltage: 12.0V
• Operating: 4.5 - 18V max
• Current - No load: 30mA
• Current - Full load: 390mA
• Gear Ratio: 82:1
• Shaft Speed: 70RPM
yg2734 Only slightly larger than the YG-2732, but with a massive increase in torque at 36RPM. Ideal for driving wheels or other traction devices.
SPECS:
• Torque: 12.0kg/cm
• Rated Voltage: 12.0V
• Operating: 4.5 - 18V max
• Current - No load: 70mA
• Current - Full load: 1380mA
• Gear Ratio: 244:1
• Shaft Speed: 36RPM
yg2738 12V DC Reversible Gearhead Motors - 160RPM
As part of our new mechatronics range, we are proud to introduce 3 combined miniature motor/gearbox sets. The motors work equally well in forward or reverse motion.
For heavy duty applications.
- Massive 50kgs torque at 55RPM
Torque: 50kg/cm @ 55RPM
Rated Voltage: 12.0V
Operating: 6 -12Vmax
Current - No Load: <450mA
Current - Full Load: 14A
Gear Ratio: 50:1
Shaft Speed: 160RPM
Weight: 0.32kg
if u go onto the jaycar website u can see the full specs on them
www.jaycar.com.au