4" Bison chuck, $40, Welland ON

[YYCHM]

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[Jswain]

At that price why choose, buy them all!

 

[PeterT]

Is it my eyes or have the inner part of jaws been both bored out & turned down to very close to chuck face? Looks like it must have been a dedicated fixture of some sort, strange divot partial holes on either side of jaws.

 

[Susquatch]

Is it my eyes or have the inner part of jaws been both bored out & turned down to very close to chuck face?

That's what it looks like to me too. Might also be soft jaws. Not the best way to do it. Might also be ground.

Looks like it must have been a dedicated fixture of some sort, strange divot partial holes on either side of jaws.

Those divots are wierd. I've seen drilled and threaded holes there to take standards. But never divots. I've actually thought about making standards for mine but never pulled the trigger. For now, I'll prolly buy factory jaw spacers when I find them on Ali.

Very interested to hear what others think the divots are for.

 

[Dan Dubeau]

I'm going to guess it was used on a drill press and those divots are marks of shame. Probably an old knock around chuck. Those divots do look oddly symmetrical though, so who knows. Maybe it held a part for drilling, and that was the hole pitch drilled into it? If tools could tell stories.....I've been here to witness some real bonehead moves that have scarred equipment for life.

Says he has 5, I wonder if that's the best of the lot......

 

[darrin1200]

Why can’t deals like this pop up in my area. We never get the deals. LOL

 

[Mcgyver]

i'll be the dissenter ..... unless you just happen to have the other jaws it's not very appealing. Doesn't exactly looked like they were only used by a little old man with his Myford on Sundays, there'll be sticker shock on the price for new jaws and its usefulness is rather limited without the other jaws.

 

[Janger]

Is it my eyes or have the inner part of jaws been both bored out & turned down to very close to chuck face? Looks like it must have been a dedicated fixture of some sort, strange divot partial holes on either side of jaws.

View attachment 44089

divots are for alignment of some sort of fixture?

 

[Tom Kitta]

Looks like they are selling old fixtures.

 

[darrin1200]

i'll be the dissenter ..... unless you just happen to have the other jaws it's not very appealing. Doesn't exactly looked like they were only used by a little old man with his Myford on Sundays, there'll be sticker shock on the price for new jaws and its usefulness is rather limited without the other jaws.

Ouch.
But the bigger sticker shock was the price of the Chuck. You could buy all of these chucks (for parts, you should be able to make at least one excellent one) as well as a set of inside and a set of outside jaws, and still be well under the cost of a new chuck.
And if you can pick and choose your chuck, you will likely get a good one, if you know what to look for.

 

[gerritv]

I bought one of these 3 jaws for my 1022 lathe and couldn't be happier. No more "where is the other set of jaws".

3 and 4 jaw chucks for bench lathes

6" Atlas original 4 jaw lathe chucks and Bison 5" 3 jaw chucks with 1 1/2 x 8 integral mounts

www.hhrobertsmachinery.com

 

[Mcgyver]

Ouch.
But the bigger sticker shock was the price of the Chuck. You could buy all of these chucks (for parts, you should be able to make at least one excellent one) as well as a set of inside and a set of outside jaws, and still be well under the cost of a new chuck.
And if you can pick and choose your chuck, you will likely get a good one, if you know what to look for.

Well under a new chuck for sure, but they look like they've had a hard life. I'd wait for a decent looking one with both jaws.

 

[Dan Dubeau]

They'd be great for a welding positioner though....

 

[trevj]

Looks like they are selling old fixtures.

Yep.

My bet is they were all mounted on a CNC mill on a tooling plate, and used for a multiple part run at each loading.