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4-jaw chuck needs some kind of tool to adjust

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Here is a 4-jaw chuck I recently acquired as part of a lot.  The jaws need a tool that has a square socket and small diameter to fit in the hole.  What would you call this tool?  Where would I find it.  I guess I could try to make it.  But, I dont want to. The chuck is made by HB Dale.


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7 hours ago, HectorLooi said:



Ahhh. Yours is a girl, mine is a boy.

The square post is 3mm x 3mm. The body of the tool must have a diameter less than 5mm...maybe less.

Clock key is a good idea.  However, the body will be too big, so I will have to turn it down.

  • Haha 1
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