All motors on this page are available with the optional AmpFlow speed reducer.
Custom motors are available with a minimum order of 25 units.
* The above specifications are for the motor's nominal voltage. The motors can also be used at lower or higher voltages. The RPM is proportional to the voltage, so running at half the nominal voltage will result in half the speed, and twice the voltage will double the speed. The maximum achievable torque is also proportional to the voltage. 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.
On Sale! Fan-cooled motors
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.
VEX High-Voltage Motor Controller
We recommend using the IFI VEX 48V motor speed controller with our 48-volt motors. Visit this page for more details.
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.
As you can see from the above charts, the efficiency of the motors is very high over a broad range of power.
Sprockets and Keys
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Contact us for custom motors and volume pricing.
"That's a beautiful motor! Wow. Good work. Great price. This should become standard equipment for all large robots."
"Very powerful. Too fast on 24 Volts even with poor batteries."
"BattleBot participants are constantly trying to make their robots quicker, stronger and faster. With nearly four horsepower and 3840 oz-in torque, the 11.9-pound A40 motor is ideally designed for our larger robots. Since power is often the deciding factor in BattleBot competitions, more and more participants are selecting these motors to power their robots with a lightweight, high-efficiency motor that provides plenty of power on demand."
"As the first motors designed specifically for robotic combat, these motor perform fabulously! They combines incredible power and some of the best features you could ask for when looking for a high-end motor for a BattleBot. They are the most powerful and finest constructed DC permanent magnet motors that I've ever used. I chose this motor for the weapon motor in Nightmare and I am definitely a very satisfied customer!"
"This motor packs a lot of power into a light-weight package. They give Minion the power it needs and I still have weight to spare!"
"Get the best motors you can afford. Good motors are the foundation upon which all else rests. People can win with hokey electronics or even with inoperative weapons, but good motors make good robots."
"We were extremely pleased with the performance of the motors in our middleweight Heavy Metal Noise at BB 4.0. The motor supplied an insane amount of energy to our kinetic disk weapons. Time to spinup was minimal and after combat the motor was never more than mildly warm to the touch."
"I've been building robots as a hobby for about 30 years and this is definitely one of the best motors (power, weight, cost, quality), that I've ever encountered. Since I've never built a 'BattleBot' before, I decided to focus most of my attention on other aspects of the design and having this motor meant that I didn't have to spend many hours 'tweaking' an inferior motor just be competitive."
"I can attest to their super high quality of craftsmanship and design. We tested them with a few different controllers and monitored the results using a Tektronix digital scope and a digital ammeter. Results: This is the largest motor we have tested and amazingly it had the cleanest feedback signal of any motor yet. Generally the higher the quality of motor mechanics, windings, brush and commutator, the cleaner this signal is. This means these motors are less likely to blow a speed controller due to transient voltage spikes.