Lynxmotion Wheel Calculator
A Javascript-powered calculator to find the wheel speed, motor RPM, or wheel diameter.

These motors are neutrally balanced, meaning they are designed to spin at the same RPM in either direction.

The torques listed are calculated by the manufacturer. Lynxmotion does not guarantee the suitability of these motors for any application.


Gear Head Motor - 12vdc 30:1 200rpm (6mm shaft) Gear Head Motor - 12vdc 30:1 200rpm (6mm shaft)

Voltage = 12vdc
RPM = 200
Reduction = 30:1
Stall Torque = 63.89 oz-in (4.6 kg-cm)
Outside Diameter = 37mm
Weight = 5.44 oz.
Full Specs
Model Number: GHM-01
Price: $21.95 
Quantity:   
Gear Head Motor - 12vdc 50:1 120rpm (6mm shaft) Gear Head Motor - 12vdc 50:1 120rpm (6mm shaft)

Voltage = 12vdc
RPM = 120
Reduction = 50:1
Stall Torque = 123.20 oz-in (8.8 kg-cm)
Outside Diameter = 37mm
Weight = 5.50 oz.
Full Specs
Model Number: GHM-02
Price: $21.95 
Quantity:   
Gear Head Motor - 12vdc 30:1 253rpm (6mm shaft) Gear Head Motor - 12vdc 30:1 253rpm (6mm shaft)

Voltage = 12vdc
RPM = 253
Reduction = 30:1
Stall Torque = 138.9 oz-in (10.0 kg-cm)
Outside Diameter = 37mm
Weight = 7.26 oz.
Full Specs
Model Number: GHM-12
Price: $29.95 
Quantity:   
Gear Head Motor - 12vdc 50:1 152rpm (6mm shaft) Gear Head Motor - 12vdc 50:1 152rpm (6mm shaft)

Voltage = 12vdc
RPM = 152
Reduction = 50:1
Stall Torque = 231.5 oz-in (16.7 kg-cm)
Outside Diameter = 37mm
Weight = 7.28 oz.
Full Specs
Model Number: GHM-13
Price: $29.95 
Quantity:   
Gear Head Motor - 7.2vdc 30:1 291rpm (6mm shaft) Gear Head Motor - 7.2vdc 30:1 291rpm (6mm shaft)

External Motor Shaft for adding USDigital Encoder!
Voltage = 7.2vdc
RPM = 291
Reduction = 30:1
Stall Torque = 54.31 oz-in (3.9 kg-cm)
Outside Diameter = 37mm
Weight = 4.27 oz.
Full Specs
Model Number: GHM-03
Price: $21.95 
Quantity:   
Gear Head Motor - 7.2vdc 50:1 175rpm (6mm shaft) Gear Head Motor - 7.2vdc 50:1 175rpm (6mm shaft)

External Motor Shaft for adding USDigital Encoder!
Voltage = 7.2vdc
RPM = 175
Reduction = 50:1
Stall Torque = 99.04 oz-in (7.1 kg-cm)
Outside Diameter = 37mm
Weight = 4.32 oz.
Full Specs
Model Number: GHM-04
Price: $21.95 
Quantity:   
Gear Head Motor - 12vdc 30:1 200rpm (6mm shaft) Gear Head Motor - 12vdc 30:1 200rpm (6mm shaft)

External Motor Shaft for adding USDigital Encoder!
Voltage = 12vdc
RPM = 200
Reduction = 30:1
Stall Torque = 55.6 oz-in (4 kg-cm)
Outside Diameter = 37mm
Weight = 4.26 oz.
Full Specs
Model Number: GHM-16
Price: $21.95 
Quantity:   
Quadrature Motor Encoder w/Cable Quadrature Motor Encoder w/Cable

Encoder = 100 cycles per revolution
Encoder = 400 quadrature counts per revolution
Frequency = up to 30khz
Note: Cable is included. Motor and mount are not included.
Model Number: QME-01
Price: $30.95 
Quantity: