MadModder
Gallery, Projects and General => Project Logs => Topic started by: BillTodd on March 25, 2017, 06:27:03 PM
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I watched far too many youtube videos over the winter months , and I caught 6 jaw chuck envy....
I can't afford to buy one, so why not make one?
I have an old Hardinge 3 jaw and a set of soft jaws , all I need to do is add another set of soft jaws . They'll fit comfortably on the scroll but will sit slightly in or out from the standard set. I have a heavily machined set that are long enough (as proof of concept) and just needed to raid the softjaw draw at work to find a better set ;-)
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Aligning the new slot to the old one is easy if you can find something to fit the slot nicely.
Machining the T slot with a home ground 14mm T-slot cutter was simple enough
Once the new T slots were cut, the chuck was mounted to a temporary back plate and the longer jaws bored back to match the other set.
All I need to do now is machine the end of the jaws to a 60 degree point ready for a final bore to size.
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Now that's a VERY cunning mod :bow:
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:nrocks: That's what I love about this place :scratch: everyone is as mad as A Box Of Frogs :lol: Seriously though what a great idea :clap: and as you said much cheaper than buying a 6 jaw :headbang:
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Some of the best ideas are so simple! In a word, Brilliant!
Regards, Matthew
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Smashing idea great work..... Hows it work for you do you see a difference ?
Anthony..
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The setup to machine the angle on the jaws turned out to be a PITA. In the end I settled for a vice in a vice arrangement that was slow to set up but at least reasonably consistent. So, after roughly levelling the tops of the jaws, I cut the angle ... twice 'cos first time I didn't take enought off to leave a nice small point to the jaw.
Once the angles were cut, I just needed to trim off an extra tooth of a couple of the jaws , machine a Cartouche for the jaws number and remount in the chuck for boring and facing.
I now need to mount the chuck on a better backplate (with a set-tru adjustment) , then I'll face the chuck and probably the jaws again. .
I have as yet to decide whether to cut them to a traditional inside stepped form or maybe even cut them down and screw demountable jaws on the top ... It can wait 'till later.
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do you see a difference ?
Anthony..
Yes, there are three more jaws :lol:
No but really the only use I can see for a six jaw chuck is for holding thin walled parts. The only time all the jaws will grip is if the part is perfectly round or deformable .
Bill
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Now that’s an idea Billtodd absolutely brilliant well done. :clap: :clap: :clap: :clap: :headbang: :nrocks:
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Thanks for the kind words guys :beer:
Bill