Stuck chuck tip

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Stuck chuck tip

This topic has 9 replies, 9 voices, and was last updated 15 October 2022 at 07:07 by David George 1.

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13 October 2022 at 14:57 #617153
Chris Murphy
Participant
@chrismurphy94983
Hi all,

this is the way I get a stuck chuck off, works every time with minimal effort.

it’s sort of the same idea from Steve Jordan’s YouTube site.

just a small piece of metal with a holder on it that wedges in between the back gear bolt and the bolt at the bottom, the lever I clamp in the chuck is some sort of tyre iron I think that I’ve had for years.

thanks

chris m…..
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13 October 2022 at 14:57 #11340
Chris Murphy
Participant
@chrismurphy94983
13 October 2022 at 17:51 #617169
old mart
Participant
@oldmart
A much better option than risking the gear teeth. If the back gear SHCS broke, it would be unlikely to be difficult to remove and replace. It wouldn't be wise for a super 7 owner to try a similar fix. After I saw the first of the 3D printed spindle locks on sale, I got a 20mm thick nylon plate and made a copy on the mill for the Atlas lathe, not as pretty, but very strong and it has to be slid sideways into position as the forces are spread over 13 teeth.
14 October 2022 at 15:37 #617273
Howard Lewis
Participant
@howardlewis46836
Gripping a piece of hexagon, attached FIRLMY, to along bar, in the 3 jaw chuck, with the belt tight,and given a hearty thump frees off the 6" chuck on my lathe. The same technique works with th 8" four jaw. The Headstock and motor usually provide enough inertia to slacken the screw on chuck.

This avoids the risk of damage to gears attached to using back gear to lock htings.

I have always heeded the advice nevr to spin on under power. Even screwing on fast, by hand, can cause a chuck to stick.

If a chuck is sticky to screw on, it suggests dirty or damaged threads, so I always check the internal and external threads are clean before attempting to unite them. A clean redundant tooth brush is an ideal implement for the task of cleaning the threads and register.

Howard
14 October 2022 at 16:16 #617279
KWIL
Participant
@kwil
Posted by old mart on 13/10/2022 17:51:38:

A much better option than risking the gear teeth. If the back gear SHCS broke, it would be unlikely to be difficult to remove and replace. It wouldn't be wise for a super 7 owner to try a similar fix. After I saw the first of the 3D printed spindle locks on sale, I got a 20mm thick nylon plate and made a copy on the mill for the Atlas lathe, not as pretty, but very strong and it has to be slid sideways into position as the forces are spread over 13 teeth.

Myford Super 7 alr eady has a Spindle Lock on the left hand side of Headstock
14 October 2022 at 17:19 #617291
Martin Kyte
Participant
@martinkyte99762
Posted by KWIL on 14/10/2022 16:16

Myford Super 7 alr eady has a Spindle Lock on the left hand side of Headstock

Absolutely and I wonder how many S7 owners don’t realise it’s there.

regards Martin
14 October 2022 at 17:35 #617295
Tim Stevens
Participant
@timstevens64731
There is a risk with using a hex-ended tool to turn the chuck in this way – the load on the scroll which tightens the chuck jaws is always on the same section of the scroll. If the srcoll is damaged (as well it might be if the chuck really is tight) you will have problems when you tighten, or loosen, the jaws from this position. And the contact area against each jaw is fairly small, so distortion is likely.

With this design of chuck, with no bolt heads sticking out front or back, it is not easy to suggest an alternative method -sorry.

Cheers, Tim
14 October 2022 at 18:38 #617312
not done it yet
Participant
@notdoneityet
With this design of chuck, with no bolt heads sticking out front or back, it is not easy to suggest an alternative method -sorry.

A large adjustable on a vise jaw should suffice for a chuck that is just too tight, to undo by hand.
14 October 2022 at 19:39 #617316
Maurice Taylor
Participant
@mauricetaylor82093
Hi, What about making a tool similar to an oil filter wrench but with a longer chain to go round main body of chuck.Not tried this myself but might work.

Hope this helps

Maurice
15 October 2022 at 07:07 #617350
David George 1
Participant
@davidgeorge1
On my chucks i have a notch in the back plate for a C spanner. This means all load is on the back plate and not the chuck when screwing or unscrewing it. This also means that my chuck always runs true within a thou when I put a round but of material in.

A tap with a small mallet and any chuck is unscrewed in this way and no load on the chuck or mounting screws between chuck and back plate or between scroll and jaws.

(Sorry about mirror image video I did that when prossesing video and do not have the knowledge to reverse it.)

David
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