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This kit is for those who already instaled The Little Machine Shop belt drive conversion on their Mini Milling Machine and want all the features seen in our 2024 system
We recomend you purchase our complete kit with toothed belt as the performance is superior. however if you already purchased the LMS belt drive and want to use it, this kit will get you there.


See the Videos in the photos of this listing:
Video 1 is the 2024 control unit operation.
Video 2 is the instal instructions and test results of the base unit.
Note base controler produces the same torque and speed but does not have e Stop or reverse on the fly.
See the original build and test results on YouTube here:
Note this system is no longer offered.

The new machined motor face plate and the new anodized pulley is included.
See video. The additional bolt pattern was not designed for the milling machine kit. It is for lathes. However it is within 2 mm. Several builders have chosen to simply slot them with a round file.
This allows instaltion of the new motor in the original motor holes.

Results of adapting Our 1 hp servo motor to the Little Machine Shop Belt Drive:

  • All power complaints are eliminated.
  • Reverse on the fly. With this controller you have instant reverse.
  • E-Stop with adjustable brake.
  • Power supply went out safty system. Will not restart if the power comes back on while you are away.
  • Full power/torque at spindle speeds as low as  160 RPM.
  • Spindle speeds as high as 3,600 RPM.
  • No belt position changes, just turn the knob.
  • Programable soft start.
  • Programable braking.
  • Programable slowest speed and fastest speed.
  • Self diognostics.

    Lead Time is 3 days.


    About the system:

    • Eliminates noisy and failure prone internal plastic H/L speed gear.
    • Control unit is placed above and and clear of the metal filings that all too often blow the main board. As seen in images. 
    • Runs extremely smooth and quiet.
    • Adds the reverse direction function that is not included on original factory machines.
    • Increases achievable spindle high speed RPM 3,280 RPM. This is the actual result we measured on this system. Each new system is subject to individual results depending on the main board, power supply, programming and the milling machine it is installed on.
    • Decreases achievable spindle speed from (factory claims 100 results indicate almost no torque) to 160 RPM with outstanding torque.
    • Increases hp from (factory claims 1/3 to 3/4 hp depending on model) to 1 HP and 10 NM torque.


    All milling machines are dangerous, increasing the horsepower increases this danger. 
    It is your responsibility to insure fit and proper application. We make no guarantee of safety, application or that this product is suitable for your intended use.

    Our 750W motor exceeds the capabilitys and stability found in most mini milling machines.
    Use at your own risk. Our liability is limited to the purchase price of this item.


    Reverse on Fly Mini Milling Machine 1 hp Upgrade Little Machine Shop Belt Drive

    Excluding Sales Tax
    • Motor range 200 ~ 4,100+ RPM. (in 10 rpm increments)
      • Motor to spindle ratio is 1.25 to 1
      • Spindle speed range is 160 ~ 3,600 RPM.
      • Full power is available at all speeds.
        This means your machine will not load up under load at low speeds.
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