Holding a chuck in a collet?

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Water-mark
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Joined: Tue Jan 03, 2017 2:09 pm
Location: England UK

Holding a chuck in a collet?

Post by Water-mark » Fri Mar 30, 2018 11:55 am

I've aquired a smart and brown sabel lathe and it only comes with one back plate.
As it has an unusual nose thread (1.75 x 8tpi)and I'm not yet up to speed on thread cutting it leaves me in a bit of a bind.
Ultimately i'll make some more but in the mean time would it be outlandish to fit a collet chuck to the back plate and then turn plain spigot back plate and face plate to use temporarily?

Mr Ron
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Re: Holding a chuck in a collet?

Post by Mr Ron » Fri Mar 30, 2018 2:21 pm

Sorry! I don't follow you.
Mr.Ron from South Mississippi

Water-mark
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Location: England UK

Re: Holding a chuck in a collet?

Post by Water-mark » Fri Mar 30, 2018 2:30 pm

If i make a back plate with a spigot instead of a threaded hole i can hold the spigot in a collet
Thereby allowing me to use both despite only having one threaded backplate.

My concern is that I'm getting away from the headstock.

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GlennW
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Re: Holding a chuck in a collet?

Post by GlennW » Fri Mar 30, 2018 2:42 pm

I'm not following either.

If all you have is a collet, how do you plan to turn a backplate that will be held in the collet?
Glenn

Operating machines is perfectly safe......until you forget how dangerous it really is!

Water-mark
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Joined: Tue Jan 03, 2017 2:09 pm
Location: England UK

Re: Holding a chuck in a collet?

Post by Water-mark » Fri Mar 30, 2018 3:32 pm

Ah
Now i see.
I have another lathe i can do plain turning on.

Harold_V
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Re: Holding a chuck in a collet?

Post by Harold_V » Fri Mar 30, 2018 3:43 pm

The resulting setup is likely to be chatter prone. Not saying it won't work, but I'd recommend it be used just long enough to create a proper setup, using it if necessary.
Rule of thumb (for me). Don't do temporary things. Once done, it's all too easy to simply go about life using them, when doing it right would have been so much better, and often not any more time consuming.

H
Wise people talk because they have something to say. Fools talk because they have to say something.

Water-mark
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Joined: Tue Jan 03, 2017 2:09 pm
Location: England UK

Re: Holding a chuck in a collet?

Post by Water-mark » Sat Mar 31, 2018 12:50 am

Ok thanks.
Next up, learn thread cutting!

Harold_V
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Location: Onalaska, WA USA

Re: Holding a chuck in a collet?

Post by Harold_V » Sat Mar 31, 2018 1:58 am

It's easy. Just keep your head clear. For right hand external threads, the compound should be set @ 5:00 (29° or 29½°). Feed with the compound, not the cross slide. Set your cross slide handle with zero on the mark and the handle @ 10:00, so when it's time to withdraw the tool and kick out the half nuts, it's an easy downhill push motion.

Until you're comfortable with threading, practice on plastic pipe. It's cheap, and forgiving. When you've mastered the art of sequencing, you should then practice on metal---which behaves considerably differently than plastic.

Luck! You can do it!

H
Wise people talk because they have something to say. Fools talk because they have to say something.

Water-mark
Posts: 20
Joined: Tue Jan 03, 2017 2:09 pm
Location: England UK

Re: Holding a chuck in a collet?

Post by Water-mark » Mon Apr 02, 2018 12:24 pm

Thanks
I've got the machine home now and I've decided to do a full strip down and rebuild in fresh paint.
I also found two face plates and a catch plate so no rush to bodge anything now.
I'll still be making some back plates once it's up and running though.

John Hasler
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Re: Holding a chuck in a collet?

Post by John Hasler » Mon Apr 02, 2018 12:30 pm

What's a catch plate?

Water-mark
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Joined: Tue Jan 03, 2017 2:09 pm
Location: England UK

Re: Holding a chuck in a collet?

Post by Water-mark » Mon Apr 02, 2018 3:01 pm

For driving dogs when turning between centres

John Hasler
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Location: Elmwood, Wisconsin

Re: Holding a chuck in a collet?

Post by John Hasler » Mon Apr 02, 2018 3:51 pm

The slots in my faceplates do that (or a chuck jaw in some setups).

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