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Standard Keyway Size Chart

Posted on February 1, 2023 in Industry Formulas by MDS

We at MDS carry a wide range of products with keyways, including bushings and roller chain sprockets. All of the measurements listed on the product pages in inches without the keyway width or depth. To help, we’ve put together the following keyway cheat sheet for the online products we carry, so you can be sure you have the right width and depth for your application. And if you want someone to help make sure you’ve selected the right product, drop us a line. We’re always happy to help.

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Keyway Size Chart IN INCHES

Shaft DiameterKeyway
Width x Depth
½”⅛ x 1/16
⅝”3/16 x 3/32
11/16”3/16 x 3/32
¾”3/16 x 3/32
⅞”3/16 x 3/32
15/16”¼ x ⅛
1”¼ x ⅛
1 – 1/16”¼ x ⅛
1 – ⅛”¼ x ⅛
1 – 3/16”¼ x ⅛
1 – ¼”¼ x ⅛
1 – 5/16”5/16 x 5/32
1 – ⅜”5/16 x 5/32
1 – 7/16”⅜ x 3/16
1 – ½”⅜ x 3/16
1 – 5/8”⅜ x 3/16
1 – 11/16”⅜ x 3/16
1 – ¾”⅜ x 3/16
1 – ⅞”½ x ¼
1 – 15/16”½ x ¼
2”½ x ¼
2 – 3/16”½ x ¼
2 – 7/16”⅝ x 5/16
2 – ½”⅝ x 5/16
2 – 15/16”¾ x ⅜