Products for bench top machinists | LittleMachineShop.com

Key, 4x8 mm

Key, 4x8 mm - Main image
$0.62 $0.95 In stock

This 4 x 8 mm key is used on the spindle and on the intermediate shaft of the mini lathe. It is used in the torsion spring mechanism of the mini mill.

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

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

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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

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Customer Reviews (4.6 / 5 · 5 reviews)

Steven S. ★★★★★

The 4x8 mm key fit perfectly into my mini lathe's spindle slot—no filing needed. It feels sturdy enough to handle the torsion spring torque without any wobble. Setup was quick and straightforward.

Scarlett S. ★★★★★

I was a little worried about the size at first, but this 4x8 mm key is a perfect precision fit for the mini lathe's torsion spring mechanism. Made my repair job quick and hassle-free.

Thomas J. ★★★★★

Exactly the right size for the mini lathe spindle and intermediate shaft, and it fit without any filing or adjustment. The torsion spring mechanism on my mini mill works smoothly now that I swapped in this key.