1934 workshop 405 9" chuck question.

superman7831 · Oct 29, 2020

My lathe has a 6" 4 jaw chuck with 1-3/8 spindle. Chucks for this spindle size are extremely rare. The spindle will accept mt3 shafts. I was wondering if it was possible to use a mt3 3 jaw chuck in the spindle in place of the thread on chuck?

SLK001 · Oct 29, 2020

superman7831 said:
My lathe has a 6" 4 jaw chuck with 1-3/8 spindle. Chucks for this spindle size are extremely rare. The spindle will accept mt3 shafts. I was wondering if it was possible to use a mt3 3 jaw chuck in the spindle in place of the thread on chuck?

You say chucks are rare, but you really mean chuck backing plates are fairly rare. This may be true. If you can't find a chuck that fits your spindle, then just make your own backing plate and fit almost any chuck body to the backplate.

Dobermann · Oct 30, 2020

Except for very light work, I would recommend against using a chuck much larger than a drill chuck with a Morse taper shank on it. You'll find the assembly to be too flexible and unless the taper in the spindle is nearly perfect, it won't stay tight. That's not to say it can't work to some extent but I don't think you'll be very happy with it.

chipss · Oct 30, 2020

I agree with not mounting a chuck on the taper.
This outfit has backing plates and chucks at decent prices. CDCO Machinery Corp.

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1934 workshop 405 9" chuck question.

superman7831

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SLK001

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Dobermann

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chipss

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