Looking for a rare chuck key

[Rich2502Participant @rich2502]

I’m looking for a Rohm S10 key with 7mm spigot , they are rare as the usual one is 6mm , has anyone got this key that fits nothing hanging about in a drawer ?  I have the one old model of Makita angle drill that uses it .

 

 

 

[peak4Participant @peak4]

Could you find one with a larger pin and turn it down, alternatively is there a Jacobs one which could be modified?
What chuck is it for?

[JasonBModerator @jasonb]

Could you just sleeve a 6mm one?

[Bo’sunParticipant @bosun58570]

Both peak4 and Jason’s ideas are valid, providing the teeth mesh correctly.  A tricky one until the spigot has been modified either way.

[Bo’sun]

On Bo’sun Said:

A tricky one until the spigot has been modified either way.

By my calculations 2 27/64 wraps of insulation tape on the 6mm spigot should bring it to 7mm, allowing a test fit to be made.

[JasonBModerator @jasonb]

You have got thicker tape than me😉

[bernard towersParticipant @bernardtowers37738]

Its on ZORO

[Howard LewisParticipant @howardlewis46836]

As suggested, turn down the 6 mm spigot to 5 mm and fit a sleeve which can THEN be turned down to 7 mm, (still only 1 mm wall).

OR if you can find a key where the gear is suitable, but with a larger spigot, turn than down to 7 mm

Howard

[Chris CrewParticipant @chriscrew66644]

I am looking for to rare chuck keys too. One for a Burnerd KC07 multi-size collet chuck and the other for a Burnerd KC10 multi-size collet chuck. Or, if anyone could advise me what the details are of the bevel gear on the closing ring of these chucks is I could possibly obtain a gear and make suitable keys.

[DC31kParticipant @dc31k]

[old martParticipant @oldmart]

I had the similar problem with a pin that was undersize on the chuck and cut off the pin, removed the tommybar so it would chuck up in the lathe and drilled into the body of the key to press in a pin that was a nice fit in the chuck. The pin may have been stepped in diameter, I forget the details. Unfortunately that key has gone missing and won’t turn up until well after I give up looking for it.

[DC31kParticipant @dc31k]

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