Where can I buy a 3inch chuck for SB

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Carlos
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Joined: Sun Nov 03, 2019 9:53 am

Where can I buy a 3inch chuck for SB

Post by Carlos » Sat Feb 22, 2020 7:25 pm

Hi, I am searching a 3 inch chuck with an 1 1/2-8tpi tread for my South Bend 9.

Under 100.-.

Would anyone know?

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SteveM
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Location: Connecticut

Re: Where can I buy a 3inch chuck for SB

Post by SteveM » Sat Feb 22, 2020 8:08 pm

If you can't find a chuck with a backplate, then find a 3" chuck with a flat back and get an adapter plate.

Best price on a backplate is going to be this one:
https://littlemachineshop.com/products/ ... &category=

It's 4", but hey, it's going on a lathe that takes 4" stuff and turns it into 3" stuff, so that should be no problem.

Search the forum for threads on making backplates, study them before you start so you don't make the same mistake I made. My backplate thread is here:

https://www.chaski.org/homemachinist/vi ... 02&p=95928
https://www.chaski.org/homemachinist/vi ... 35&p=96163
https://www.chaski.org/homemachinist/vi ... 27&p=97582

Steve

whateg0
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Location: Wichita, KS

Re: Where can I buy a 3inch chuck for SB

Post by whateg0 » Sun Feb 23, 2020 4:53 am

I think you're going to have to go the plain back route. That's a pretty small chuck for a large with that spindle.

Dave

whateg0
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Location: Wichita, KS

Re: Where can I buy a 3inch chuck for SB

Post by whateg0 » Sun Feb 23, 2020 4:56 am

Here's a 3" plain back chuck with a backplate.

https://www.ebay.com/itm/350595707098

Dave

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Bill Shields
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Re: Where can I buy a 3inch chuck for SB

Post by Bill Shields » Sun Feb 23, 2020 3:41 pm

shars sells them

https://www.shars.com/products/workhold ... diameter=3

I have one and it is amazing how handy it is to have. mine has a 5C but they also sell backplates

https://www.shars.com/3-14-fully-machin ... the-chucks
Too many things going on to bother listing them.

Carlos
Posts: 26
Joined: Sun Nov 03, 2019 9:53 am

Re: Where can I buy a 3inch chuck for SB

Post by Carlos » Mon Feb 24, 2020 8:59 pm

Thanks a lot. That helps.

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