Wheel Motors



The AmpFlow Wheel/Gearmotor combination can be configured with your choice of six different wheel sizes and ten different motors.

The high-traction solid rubber wheels are 1.5 inches wide and they range in diameter from 4 inches to 10 inches. The big pneumatic 12.5-inch wheel pictured on the left is 2.75 inches wide.

The solid rubber wheels have a custom hub that is keyed to the wheel and also to the 3/4-inch shaft of the speed reducer. The wheel is assembled with 1/4-inch keys and held in place by two aluminum discs and a spacer. The whole assembly is held together by a 5/16-18 screw that threads directly into the shaft.

The 12.5-inch pneumatic wheel also has a 3/4-inch hub that slips onto the shaft of the speed reducer.

This combination of high power, high traction, and light weight make these wheels ideal for robots and other mobile applications.



Here are the ten gearmotor choices:

Type High-Performance Mid-Range Economy
Model A28-400-G A28-150-G F30-400-G F30-150-G E30-400-G E30-150-G
Peak Horsepower 4.3 3.0 3.0 2.3 2.1 1.0
Motor Diameter (inches) 3.0 3.0 3.1 3.1 3.1 3.1
Reduction Ratio 8.3:1 8.3:1 8.3:1 8.3:1 8.3:1 8.3:1
Stall Torque (in-lbs) 1930 1020 1300 710 770  360
Nominal Voltage 24* 24* 24* 24* 24* 24*
No-Load RPM 580 720 540 830 680 670
Pounds 10.4 7.3 11.8 8.2 9.4 7.1
Price $639 $534 $479 $429 $299 $269
Pictures A28-400-G A28-150-G F30-400-G F30-150-G E30-400-G E30-150-G
Drawings A28-400-G A28-150-G F30-400-G F30-150-G E30-400-G E30-150-G
Performance Charts A28-400-G A28-150-G F30-400-G F30-150-G E30-400-G E30-150-G

* The above specifications are for 24V. The motors can also be used at 12V or 18V. The RPM is proportional to the voltage so running at 12V will result in half the no-load RPM that is shown above for 24V. The lower voltage also reduces the maximum achievable torque by 50%. The motors have also been tested and used at higher voltages resulting in higher RPM, torque, and power. Shorter duty-cycles are recommended for higher voltages to allow the motors time to cool.


NEW! Fan Cooled Motors

Type Fan Cooled  24V Fan Cooled 48V  
Model A28-400-F24-G A28-150-F24 A28-400-F48 A28-150-F48    
Peak Horsepower 4.3 3.0 11.5* 4.6    
Motor Diameter (inches) 3.0 3.0 3.0 3.0    
Reduction Ratio 8.3:1 8.3:1 8.3:1 8.3:1    
Stall Torque (in-lbs) 1930 1020 3740** 1290    
Nominal Voltage 24V 24V 48V 48V    
No-Load RPM 580 720 750 880    
Pounds 10.6 7.5 10.6 7.5    
Price $689 $584 $689 $584    
Pictures A28-400-F24-G A28-150-F24 A28-400-F48 A28-150-F48    
Drawings A28-400-F24-G A28-150-F24 A28-400-F48 A28-150-F48    
Performance Charts A28-400-G A28-150-G A28-400-F48 A28-150-F48    

The fan-motors have ventilation holes in the front and rear aluminum plates to allow for flow-through cooling. The holes in the front plate are positioned so they are not blocked when mounting the motor to a flat surface. These motors also feature low-profile motor leads for better fit into smaller spaces.

* Theoretical peak power is 11.5 HP. Power at the recommended short-term current limit of 200A is 9.1 HP.
** The current required to reach 3740 in-lbs is far outside the safe operating limits of this motor. This figure is theoretical and should be used for comparative purposes only.
*** Available for pre-order now. Estimated shipping date is 1/15/16. Credit cards will not be charged until motor is shipped.

Recommended 48V motor speed controllers from IFI will be available soon. Please contact us by email to be notified when the controllers become available:

Here is a chart showing the no-load speed (in MPH) for each Wheel / Motor combination:

Wheel A28-400-G A28-150-G F30-400-G F30-150-G E30-400-G E30-150-G A28-400-F48 A28-150-F48
4-inch 6.9 8.6 6.4 9.9 8.1 8.0 8.9 10.5
5-inch 8.6 10.7 8.0 12.3 10.1 10.0 11.1 13.1
6-inch 10.4 12.9 9.6 14.8 12.1 12.0 13.4 15.7
8-inch 13.8 17.1 12.9 19.8 16.2 15.9 17.8 20.9
10-inch 17.3 21.4 16.0 24.7 20.2 19.9 22.3 26.2
12.5-inch 21.6 26.8 20.1 30.9 25.3 24.9 27.9 32.7



WheelMotors with the E30-150 motors. (Click for larger images)
4-inch WheelMotor 5-inch WheelMotor 6-inch WheelMotor






8-inch WheelMotor 10-inch WheelMotor 12.5-inch WheelMotor




Modular Drive Unit with 4-inch wheel

The picture on the left shows the 4-19 wheel mounted in the Modular Drive Unit. Click here for details and specifications.

Visit the Order Page to place an order for the Modular Drive Unit.




The price of the speed reducer is $190. To that you can add any available combination of motors and wheels to get the best balance of power, speed, and price. Please see our Motors page for more information on our motors and visit the Speed Reducer page for more details of our custom gearhead. The above wheels are available separately on the Wheels page.



Wheel/Motor Combination - Base Price: $190






The wheelmotors are warranted to be free from manufacturing defects, and fully operational when you receive them. AmpFlow gives no other warranty, either expressed or implied. Warranties are not transferable. In no event shall AmpFlow's liability exceed the buyer's purchase price, nor shall AmpFlow be liable for any indirect or consequential damages.

Shipments must be to a street address; we can not ship to a PO Box. Please allow 7-10 days for orders shipped by UPS ground, 3-4 days for orders shipped by 2nd day air, and up to 14 days for international orders.

Contact us for custom gearmotors and volume pricing.

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