Standard keyway depths

[frijoli]

In the US the standard key depth is one half the width. In the bore and in the shaft. The measurement in both cases is from the flat contact, plus an additional clearance in the depth

A 1/4" key is .125 measured from the flat plus about .005"


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[Gadget]

Good information, I made it sticky. Thanks for sharing. My next project (after the mill) will be a shaper so I will use that information when I get it done.

[frijoli]

Good information, I made it sticky. Thanks for sharing. My next project (after the mill) will be a shaper so I will use that information when I get it done.

Glad you liked it. I'm full of machine trivia!