Products for bench top machinists | LittleMachineShop.com

20TPI Inch Conversion Kit Feed Screw Parts, Mini Lathe

20TPI Inch Conversion Kit Feed Screw Parts, Mini Lathe - Main image
$62.97 $89.95 In stock

These parts change Grizzly, Harbor Freight, Homier, and Cummins mini lathes to 20 thread per inch feed screws on the cross slide and compound rest.
Each rotation of the hand wheel will advance 0.050".

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)

David F. ★★★★★

Installing these on my mini lathe was straightforward and the cross slide now moves with satisfying precision. The 20 TPI really makes fine adjustments easy and I can see the 0.050" advance per turn in my threading work.

Brian ★★★★★

The math works out perfectly—0.050" per rotation is exactly what I needed for dialing in my cuts, and now I can sneak up on a dimension without guessing. The thread pitch conversion feels smooth on both the cross slide and compound, no binding or slop.

Benjamin ★★★★★

Installing these was straightforward, and the difference is immediate—that 0.050" per rotation makes dialing in precise cuts feel way more intuitive than the stock threading. My cross slide now moves exactly as expected every time, no more guessing.