What to do with a wrecked 3 jaw

This topic has 12 replies, 8 voices, and was last updated 2 October 2015 at 17:48 by Old Elan.

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1 October 2015 at 19:52 #206289
Old Elan
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@oldelan
I have been fiddling with a PB Griptrue which came with some other stuff and have decided that it is probably scrap or a doorstop!

Having seen an ad on the Homeworkshop site to sell what I would evaluate as a totally destroyed 3 jaw with just one jaw for £35 I am now thinking I could cash in?!

At least there are no chunks missing from the body of my chuck but even new jaws rock and then 'push up' when they are bought together. The scroll hasn't lost too much of its ends but it is a very loose fit in the body. It has had a very hard time!

Is there a use for such an object other than its scrap value?
Advert

1 October 2015 at 19:52 #24141
Old Elan
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@oldelan
A prompt from an advert.
1 October 2015 at 20:00 #206290
Old School
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@oldschool
They make good stands for Christmas trees
1 October 2015 at 20:04 #206291
Nick_G
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@nick_g
.

Murder weapon.? ………………………………….. possibly

Nick
1 October 2015 at 20:31 #206295
Old Elan
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@oldelan
Best not show the Good Lady that reply!
2 October 2015 at 09:14 #206314
David Clark 13
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@davidclark13
Put it on Ebay, sold as is. Quick £100 +.
2 October 2015 at 10:01 #206324
Russell Eberhardt
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@russelleberhardt48058
Posted by David Clark 1 on 02/10/2015 09:14:36:

Put it on Ebay, sold as is. Quick £100 +.
2 October 2015 at 10:25 #206328
Clive Foster
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@clivefoster55965
Perhaps you could re-machine the body to take inserted guides for the jaws to run on. My "best" three jaw chuck, a 160 mm PB precision, is made in this manner with square section steel strips for the jaw guides. Presumably to allow replacement if wear occurs. As I recall matters I paid approaching £400 for the brand new chuck some 20 years back so ought to have been of decent quality. The very nice, near unworn (but hideously painted in a sort of purple so hideous that no camera would capture an accurate likeness!) late model SouthBend Heavy 10 it was intended for set me back around £500 which I considered a fairly reasonable division of expenditure. Decent work holding is the foundation of good work. Life is too short to struggle with crappy chucks.

If the scroll is intended to run on a central boss in the body it is possible to re-machine the boss and fit a cylindrical insert of appropriate thickness to take up the clearance. Have done similar many years back on the almost as bad chuck that came with my Portass S (two pints and a packet of smoke to you sir) which worked in so far as it made things better but frankly the whole thing, lathe included, wasn't worth the effort. Although I eventually made 4 pints profit during trading up to a Pools Special.

A Griptru is usually a decent chuck so if you have nice new jaws it may well be worth expending time and effort on it.

Clive.
2 October 2015 at 13:38 #206350
Old Elan
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@oldelan
David, Russell, I don't think I could be so brazen! Even the tapered adjusting screws are badly scored. I just can't imagine how it got into such a state!

Clive, on more inspection I have found that both the teeth on the scroll and the drive pinions are also very warn. They're around £200 from Rotagrip

Maybe I WILL try David's idea afterall!
2 October 2015 at 15:16 #206366
DMB
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@dmb
Chuckit!

Sorry, it was irresistable.
2 October 2015 at 15:52 #206368
Old Elan
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@oldelan
You'd better duck!
2 October 2015 at 15:52 #206370
Martin Kyte
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@martinkyte99762
Buy a set of soft jaws for it for about £30 from rotagrip and use it.

regards Martin
2 October 2015 at 17:48 #206381
Old Elan
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@oldelan
I have three sets of new jaws, inside, outside and soft and they all rock in the guides.

It's broke.

Ebay!
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