Item #: F30-150-G
UPC: 02614450111
Retail: $430.00
Price: $429.00
You Save: $1.00 (0.2%)
    Points to Purchase: 61286
    Availability: Available
    Usually ships In 3-9 business days (sooner, if drop-shipped)


    The AmpFlow speed reducer is a heavy-duty, low-cost, gearhead that works with any of the three-inch diameter AmpFlow motors.

    This speed reducer uses a unique three-stage chain-and-sprocket mechanism that reduces cost while still maintaining high torque capacity.

    This unit provides speed reduction and torque multiplication, and it's an easy way to "bolt-in" the AmpFlow motors.

    These speed reducers are made with a three-piece aluminum case that has been precision CNC machined. A total of six sprockets, three roller chains, and five bearings comprise the mechanism. The long output shaft makes it easy to mount pulleys, sprockets, gears, or wheels in the required position. Care was taken to make this unit as compact as possible. The overall dimensions are 6 inches x 3 inches x 2 inches. But the motor is recessed slightly into the reducer, so the net length added to the motor is only 1.78 inches.

    The speed reducer uses a unique arrangement of roller chains. This results in torque and efficiency comparable to gear-type reducers at just 1/2 or even 1/3 of the cost of high-torque, geared speed reducers. There is slightly more noise, but these units are ideal when silent operation is not required.

    The hardened output shaft is 3/4-inch diameter and 2.2 inches long. It has a 1/4-inch key and a 5/16-24 tapped hole. It is fixed to the sprocket with a hexagonal spline to strengthen the connection between the shaft and sprocket.

    A single stage of roller chain reduction is generally considered to be about 98% efficient. Add in some friction from the five bearings and we are at about 90% efficiency.


    Torque Testing
    This picture shows the speed reducer undergoing a torque capacity test. The motor is locked and unable to turn. Weight is loaded onto the end of the 40-inch bar until the speed reducer fails. The failure point is 3500 inch-pounds. This gives an almost 2-to-1 margin of safety when used with our most powerful motor, the A28-400.

    The failure point is the chain on the last stage of speed reduction. The gearbox suffered no other damage. The $10 chain was replaced and it's as good as new.

    Backlach Test
    The gearhead is tested for backlash by locking the motor in place. A load of 200 ounce-inches is applied in both clockwise and counter clockwise directions. The total deflection is +/- 1.2 degrees. This figure may increase somewhat with higher loads and chain wear, but replacement chains are available.

    Four long 1/4"-20 bolts go all the way through the width of the reducer. The four mounting bolts are supplied with the the unit. They are sufficient in length to mount the gear motor to a 3/8-inch thick panel. If the panel is thicker, longer bolts will be needed. Do not operate the speed reducer with bolts that are missing or too short - they are required for structural integrity.

    Peak Horsepower 2.3
    Motor Diameter 3.1 in.
    Reduction Ratio 8.3:1
    Peak Torque 710 in-lbs
    Nominal Voltage 24V
    No-Load RPM 830
    Weight8.2 lbs


    Performance Chart

    Overall Customer Rating of 1 Reviews:
    review-star review-star review-star review-star review-star

    best thing since sliced bread

    review-star review-star review-star review-star review-star
    i used two of these in my middle weight Wildfire in a four wheel drive setup with 8" wheels and a 1.5-1 additional reduction stage because i didn't need 19Mph but i wanted more pushing power the only thing keeping it from five stars is that the face plate needs to be a little thicker so it comes flush to the bearings as they stick out about .125 and that can be inconvenient when mounting it to something where you want minimal machining, what you can do is just make some spacers and put them in between the face and the mounting point, overall i really like it and the chain reduction system is just plain genius!!!