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SAE drill size to ER collet size

DavidR8

Scrap maker
Administrator
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Premium Member
I have an ER32 collet chuck with 11 collets. A recent project revealed that I am missing collet sizes to hold some SAE drill sizes.
To figure out what I collets I was missing I made this chart showing the SAE drill size up to 1/2" and their corresponding SAE ER collet size.
Hope this is useful to others.
 

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