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Your cart is empty.The AmpFlow P40-250 is a high-torque pancake-style motor designed to deliver good performance and efficiency at an economical price. This is achieved by the use of four brushes and advanced electromagnetic computer modeling and design.The motor is 4.0 inches in diameter and 3.2 inches long. The shaft rides in two high-quality ball bearings. The heavy-gauge motor leads are 14 inches long. The motor weighs 4.2 pounds, and it is finished in a high-quality black powder-coat.This reversible motor can be used at voltages ranging from 12V to 36Vdc. At 24 Volts, the no-load speed is 3400 RPM. The rated power output is 250W at 2800 RPM at 14 Amps. Peak efficiency is 78%.This motor is supplied with an 11-tooth sprocket for #25 roller chain.AmpFlow® motors are used in diverse applications, including robots, electric scooters, electric bicycles, and other personal transport systems. Search for "AmpFlow motors" for more choices.
Customer
June 27, 2025
Great motor, very responsive from top to bottom of the voltage range. TONS of Power!!
Christopher allan ford
June 2, 2025
The media could not be loaded.
Michael
May 31, 2025
Came mint in box , hooked it up to my razer e300 thinking it would be better than original motor with all the nice graphs posted , was riding and all of a sudden the sprocket stopped spinning and I can hear the rotor spinning (or something is barely trying to spin inside the motor) not sure if I just got a bad motor or what , but definitely would not get this again , bought this one thinking it's better than the other cheaper motor , but I was wrong (last photo I was seeing if it fit. Yes I know 2 bolts are missing thanks)
Claude
May 10, 2025
Great motor
jacques
April 28, 2025
bien
David Knight
April 23, 2025
Ok
Keith Francis
March 27, 2025
I got this motor for a project I'm building. The motor has proven to be strong with no issues. It will run on a wide voltage range (9v to 36v). This made it a great motor for my purposes and I plan on buying more of these for other projects in the future. Shipping was ok, a little slow for my taste, but still arrived with no defect.
Gereth
March 25, 2025
Using as a generator with 3d printed wind turbines. Good consistent output, been running outdoors in the cold for about a month without issue (covered of course).
Anthony Yong
January 19, 2025
Low noise motor. Note that manufacturer used loctite on the nut thread, so if you want to remove the nut, use a gas/propane torch and heat for about 10 to 20 sec to soften the loctite. To loosen the nut need to turn clockwise, use a wrench to hold the sprocket as there is a slip ring between the sprocket and motor spindle. Intend to fix onto my bike later, once the other parts arrive.
Exceldkai
December 14, 2024
Great motor worth its price. Easily reaches near its top rpm rating with some load.Tested w 24V nominal and it was about 3000 rpm.Don't go for cheapies. Get this one.
Brad
December 12, 2024
Good little motor.
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