Compact and light-weight, these motors are available in two versions; the Neodymium-magnet, four-brush version for uncompromised performance, and a lower-cost, ferrite-magnet two-brush version designed for high-volume OEM use.

See the Standard Motors page for more options. We stock these motors, but with a minimum order of 25 units, we can design custom brushed or brushless motors.




Type High-Performance Economy Economy
Model A23-150 F24-150-12V F24-150-24V
Diameter (inches) 2.3 2.4 2.4
Length (inches) 3.5 4.1 4.1
Peak HP 0.90 0.29 .31
Stall Torque (oz-in) 570 206 250
Efficiency 82% 67% 70%
Voltage 24V* 12V* 24V*
RPM 6400 5600 4900
Shaft Dia. (inches) 3/8 5/16 5/16
Shaft Length (inches) 1.0 1.4 1.4
Magnet Type Neodymium Ferrite Ferrite
No Load Amps 1.0 2.5 1.1
Resistance (Ohms) 0.21 0.16 0.58
Kt (oz-in/Amp) 5.03 2.80 6.45
Kv (RPM/Volt) 269 482 210
Weight (pounds) 2.1 2.0 2.0
Price $319 $49 $49
Performance Charts


* The above specifications are for 12V or 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. Please note that the above torque figures are the theoretical peak torques when stalled. Operating any high-performance motor while stalled will damage it.




Getting high efficiency from a low-voltage motor is not easy. There are many factors that effect efficiency. We have optimized each of these factors to achieve very high efficiency in these motors.

Type High-Performance Economy Economy
Model A23-150 F24-150-12V F24-150-24V
Voltage 24 12 24
Peak Efficiency (PE) 82% 67% 70%
RPM at PE 5900 4700 4200
Torque at PE (oz-in) 45 33 36
Horsepower at PE 0.26 HP 0.15 HP 0.16 HP
Current at PE 10 Amps 14 Amps  7 Amps

The RPM is the same in both directions to within about 3%.

Here are our recommendations regarding the selection of a proper reduction ratio.


The motors 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.


  We accept Visa, MasterCard, and PayPal.

A23-150 Motor - $319      Quantity

    F24-150-12V Motor - $49      Quantity

    F24-150-24V Motor - $49      Quantity

Replacement brushes are available here

Contact us for custom motors and volume pricing.



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