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Posted by Alan Bain on June 20, 2008, 3:55 pm
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>
>Tried that dilling out trick today, but it was a definite no, no.
>
>It's not a Jacobs Chuk but one of those expensive German keyless chucks
>(makers name escapes me at the moment).
>
>It just laughed at a HSS drill, couldn't even get through it with one
>of my precious diagrit hard cut drills, that went in about 6mm and
>started smokin'.
You were probably lucky. The drilling method usually ruins keyless
chucks (certainly Albrecht pattern ones) as there is a critical part of
the mechanism at the back of the chuck. It does work on keyed chucks
and in the workshop practice book by Tubal Cain on drills he
recommends doing it to new chucks before fitting on the arbor. M6 was
the recommended size for chuck up to 3/8" and I can confirm that I did
this successfully with a Jacobs 32 last weekedn.
>
>It's gonna have to remain as is until I can knock up a coupla
>wedges.............
Arc Euro only seemed to sell JT2 wedges when I bought a set. I needed
JT33 and JT6, B12 and B16 too so I opted for the drill method!
Alan
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>Tried that dilling out trick today, but it was a definite no, no.
>
>It's not a Jacobs Chuk but one of those expensive German keyless chucks
>(makers name escapes me at the moment).
>
>It just laughed at a HSS drill, couldn't even get through it with one
>of my precious diagrit hard cut drills, that went in about 6mm and
>started smokin'.