Products for bench top machinists | LittleMachineShop.com

Belt Drive Conversion Kit, Mini Mill

Belt Drive Conversion Kit, Mini Mill - Main image
$124.06 $169.95 In stock

This mini mill belt drive conversion kit provides an easy-to-install alternative to the noisy and fragile factory-installed gears that drive the spindle on the mini mill.

This kit is CNC-machined from the highest quality materials. Designed to run full-time, it is built to last. The belt drive conversion kit includes one belt.

Change speeds without any tools. Simply remove the guard, loosen the lever locks and move the belt from one pair of pulleys to the other. Low speed range is 0-1700 RPM. High speed range is 0-4300 RPM.

The installation is bolt-on and takes about 20 minutes.

This belt drive kit fits the mills shown on the Compatibility tab. Don't expect it to fit other machines.

The small pulley has a 9 mm bore with a 3 mm keyway. The large pulley has a 30 mm bore with a 5 mm keyway. If your shafts don't match these values, then this belt drive will not fit your mill.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Samuel V. ★★★★★

The CNC-machining is super clean, and the belt drive slipped right into place on my mini mill. Cuts are noticeably smoother now, and I don't have to crank the speed control to avoid gear chatter.

Abigail ★★★★★

Swapped out the noisy gears and the difference is night and day—the spindle runs much quieter now. Installation was straightforward with the CNC-machined parts fitting perfectly.

Abigail ★★★★★

The CNC machining is evident right out of the box, and the kit bolted on without any filing or fuss. My mini mill now runs so quietly I can actually hear the radio while I'm working.