Products for bench top machinists | LittleMachineShop.com

Key, 5x16 mm

Key, 5x16 mm - Main image
$0.62 $0.85 In stock

This 5x16 mm key is the second of three keys used on the spindle of the mini mill with the R8 spindle. It is a replacement part designed to fit your machine's spindle assembly.

  • Replacement key for mini mill spindles with R8 taper
  • Dimensions: 5 mm x 16 mm
  • Second key in a set of three used on the spindle
  • Manufactured by Sieg Industrial Group
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 (4.6 / 5 · 5 reviews)

Benjamin ★★★★★

The dimensions are spot on for the R8 spindle, and the key slid in without any filing needed. Much better than trying to reuse the worn original.

Lily ★★★★★

The 5x16 mm key fit perfectly into the spindle assembly on my mini mill, no wobble at all. It’s a solid metal piece that feels just like the original part I was replacing. Glad I found this exact size.

Andrew ★★★★★

Was a little nervous about getting the exact match for the R8 spindle, but the 5x16 mm dimensions are spot on. Slid right into the slot on the mini mill and the spindle is solid again, no wobble at all. Just wish it came with the other two keys in a set, but this one does the job perfectly.