Buck 5" ajust tru Hardinge back plate.

Ranchman83 · Feb 14, 2021

Was told this likely fits a Hardinge lathe. Anyone know for sure? I don't own a Hardinge it came with a chuck I bought.

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Stradbash · Feb 14, 2021

It must be for Hardinge, I don’t know what else it could be.

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L Vanice · Feb 15, 2021

Buck made a special 5" Ajust-Tru chuck for Hardinge lathes. The bore for the spindle nose was larger than most small lathes, leaving too thin a wall for the four adjusting screws to press against. So the Hardinge chucks have a 2.75" counterbore for the front of the adapter plate. The standard chucks have a smaller counterbore, but I do not recall the exact figure. You can use the Hardinge chuck on a plate made for a different lathe (1.5 x 8, for instance) if you make four new, longer, plugs or screws.

Larry

Ranchman83 · Feb 15, 2021

Thank you!

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Ranchman83 · Feb 15, 2021

Larry, that helps a lot. I think what I have is a standard ajust tru chuck with a 2.38 counter bore and a shop made back plate with thin walls. This would also require a pretty thin back plate for a 2 1/4 threaded spindle also.... [emoji848] guess I'll let the chuck go with the small lathe I'm getting rid of.

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Buck 5" ajust tru Hardinge back plate.

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