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lock chuck onto spindle (Read 1,383 times)
 
Robert Patton
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lock chuck onto spindle
Dec 23rd, 2015 at 8:15am
 
How does one lock a chuck or faceplate onto the spindle when the spindle rotation is reversed.
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Tony Rozendaal
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Re: lock chuck onto spindle
Reply #1 - Dec 23rd, 2015 at 8:39am
 
Some chucks and faceplates have set screws that can be threaded into a groove that exists in the spindle near the headstock. If the groove isn't there, then the spindle threads need to be protected with some material (leather, brass, etc) between the bottom of the setscrew and the threads. Not all faceplates and chucks have these screws.
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Bob_Macgregor
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Re: lock chuck onto spindle
Reply #2 - Dec 23rd, 2015 at 9:01am
 
With my chuck, which has a thread adaptor, I think it might require two set screws, one from the adapter to the spindle threads and one from the chuck to the adapter (my chuck has neither, though).
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Bert Delisle
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Re: lock chuck onto spindle
Reply #3 - Dec 23rd, 2015 at 9:59am
 
One could consider using the tail stock, for the lathes that do not have a Chuck locking option. Put a wood push block threaded on or fitted tothe live center.
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Kenn Harris
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Re: lock chuck onto spindle
Reply #4 - Dec 23rd, 2015 at 8:04pm
 
Robert...Thanks to a more experienced turner here on this site, I found out how to lock down my chucks when turning in reverse since my lathe (Jet 1221VS...) does not have a 'flat' or 'groove' on the spindle to allow a set screw to clamp down the chuck without damaging the spindle...  His solution...drop a small round lead fishing sinker (split shot...) into the set screw hole prior to tightening the set screw down...  The lead sinker/split shot will make contact and hold WITHOUT damaging the spindle!!!  Great advice and it works super well!!!  Regrettably, I can't remember who this 'miracle turner' was, but i certainly remember his simple and inexpensive solution!!! 
Good Luck and Safe turning to you always!
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Frank Johnston
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Re: lock chuck onto spindle
Reply #5 - Dec 25th, 2015 at 3:30pm
 
There are set screws available with either nylon or brass tips.

The softer tip is specifically designed as to not damage the set screws mating surface.  Smiley
 
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JimQuarles
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Re: lock chuck onto spindle
Reply #6 - Dec 25th, 2015 at 5:20pm
 
Unless it is a rotating tip, It won't work on a threaded shaft.  The threads will grind it off as it tightens.
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Frank Johnston
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Re: lock chuck onto spindle
Reply #7 - Dec 25th, 2015 at 5:46pm
 
JimQuarles wrote on Dec 25th, 2015 at 5:20pm:
Unless it is a rotating tip, It won't work on a threaded shaft.  The threads will grind it off as it tightens.

Ah..yes! Didn't think of that. Smiley
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Jerry Marcantel
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Re: lock chuck onto spindle
Reply #8 - Dec 25th, 2015 at 6:13pm
 
Hows this for a solution. Screw the chuck on until it's tight.  Screw the set screw in until it hits the spindle threads, back the set screw out, unscrew the chuck, get a file, and file a flat where the set screw left marks on the spindle. You're not going to weaken the spindle........... Jerry (in Tucson)
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« Last Edit: Dec 25th, 2015 at 6:14pm by Jerry Marcantel »  
 
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Bill Schoppert
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Re: lock chuck onto spindle
Reply #9 - Dec 28th, 2015 at 4:16pm
 
I'm sure now that I'm saying this it will happen but I have never used a set screw and I use the reverse all the time when sanding. The chuck locks on pretty tight that I have to use a wrench to get it off. Just a pop and it's off.
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John Grace
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Re: lock chuck onto spindle
Reply #10 - Jan 3rd, 2016 at 8:42am
 
I agree with Bill Schoppert.  I used the set screw regularly when I first started turning, and YES, I am one of those who forgot it was on and couldn't figure out why my chuck wouldn't unscrew, ugh.  Started leaving it out when doing normal turning.  I reverse the rotation a dozen times or so per piece whenever I complete my sanding process and have never had one un-spin on me.  Now the only time I will use the set screw is on those rare occasions when I turn in reverse...when I need to approach the piece from an awkward angle, etc.
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Ron Carrabotta
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Re: lock chuck onto spindle
Reply #11 - Jan 3rd, 2016 at 10:39am
 
I seldom use the set screw option on my faceplates or chucks, even when sanding in reverse.

The one exception is when I use my Easy Wood Chuck, I ALWAYS use the set screws on that chuck, the threads are so precise, the first time I used it without the set screws, it spun of when I turned the lathe off!
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Guy Bratt
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Re: lock chuck onto spindle
Reply #12 - Jan 3rd, 2016 at 9:25pm
 
Ron  I've had that happen.  It's kind of exciting isn't it ?
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