problems with my buck chuck

S

songbird

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This Clausing lathe I just bought, has a 6" adjustable 3 jaw buck chuck. I couldn't be happy, but when I adjust the chuck, the closer you get bringing the jaws together, (about 1 1/2" apart), the harder it is to tighten. I've removed the jaws and cleaned all I could, but it doesn't seem to help. I have not stripped it down all the way down by removing the faceplate screws and possibly seperating the face plate from the body. Has anyone out there had the same problem, was this the fix? Was there anything to watch out for? Thanks in advance, Jim.

***Found the problem, damaged chuck. I stripped it all the way down, did find it dirty, but when I cleaned it, it did not work any better. I stripped it down again, removed the scroll plate and tried to manually feed the jaws thru the t-slots. That's where I found the issue. I think the previous owner had run something into the chuck with the jaws extended out, damaging/re-forming the body around the t-slot. I used a fine file and smoothed out the slots untill I could just feed the jaws thru them. I'm sure this was not the correct way, but I think the alternative was to replace the chuck. Any way, the chuck works now. Thanks everyone for your input, Jim.
 
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Sounds like that chuck needs a good cleaning. It must have chips in there jamming it up on you. Your not going to get it cleaned out properly untill you remove it from the lathe, strip it down, and give er a real cleaning.

I use a S/S tooth brush size wire brush to clean the scroll and any parts that have swarf embedded in side. Once you take it apart, you,ll know doubt be surprized how much junk gets in there. Just veiw it as a regular service to your chucks. All chucks need a cleaning every so often.

 
Remove the jaws and check the scroll thru the T-Slots turning the adj. screws. This is probably where it is still dirty. It could also be damaged. I check the scroll every time I reverse the jaws. No surprizes that way.

"Billy G" :))
 
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Take it apart and clean it before you damage the scroll of the jaws. Forcing it is risking jamming a chip in the scroll and ruining its accurate surfaces. Not saying you are forcing it.
 
8ntsane said:
Sounds like that chuck needs a good cleaning. It must have chips in there jamming it up on you. Your not going to get it cleaned out properly untill you remove it from the lathe, strip it down, and give er a real cleaning.

I use a S/S tooth brush size wire brush to clean the scroll and any parts that have swarf embedded in side. Once you take it apart, you,ll know doubt be surprized how much junk gets in there. Just veiw it as a regular service to your chucks. All chucks need a cleaning every so often.
Click to expand...
***Found the problem, damaged chuck. I stripped it all the way down, did find it dirty, but when I cleaned it, it did not work any better. I stripped it down again, removed the scroll plate and tried to manually feed the jaws thru the t-slots. That's where I found the issue. I think the previous owner had run something into the chuck with the jaws extended out, damaging/re-forming the body around the t-slot. I used a fine file and smoothed out the slots untill I could just feed the jaws thru them. I'm sure this was not the correct way, but I think the alternative was to replace the chuck. Any way, the chuck works now. Thanks everyone for your input, Jim.
 
george wilson said:
Take it apart and clean it before you damage the scroll of the jaws. Forcing it is risking jamming a chip in the scroll and ruining its accurate surfaces. Not saying you are forcing it.
Click to expand...

***Found the problem, damaged chuck. I stripped it all the way down, did find it dirty, but when I cleaned it, it did not work any better. I stripped it down again, removed the scroll plate and tried to manually feed the jaws thru the t-slots. That's where I found the issue. I think the previous owner had run something into the chuck with the jaws extended out, damaging/re-forming the body around the t-slot. I used a fine file and smoothed out the slots untill I could just feed the jaws thru them. I'm sure this was not the correct way, but I think the alternative was to replace the chuck. Any way, the chuck works now. Thanks everyone for your input, Jim.
 
Bill Gruby said:
Remove the jaws and check the scroll thru the T-Slots turning the adj. screws. This is probably where it is still dirty. It could also be damaged. I check the scroll every time I reverse the jaws. No surprizes that way.

"Billy G" :))
Click to expand...

***Found the problem, damaged chuck. I stripped it all the way down, did find it dirty, but when I cleaned it, it did not work any better. I stripped it down again, removed the scroll plate and tried to manually feed the jaws thru the t-slots. That's where I found the issue. I think the previous owner had run something into the chuck with the jaws extended out, damaging/re-forming the body around the t-slot. I used a fine file and smoothed out the slots untill I could just feed the jaws thru them. I'm sure this was not the correct way, but I think the alternative was to replace the chuck. Any way, the chuck works now. Thanks everyone for your input, Jim.
 
songbird said:
***Found the problem, damaged chuck. I stripped it all the way down, did find it dirty, but when I cleaned it, it did not work any better. I stripped it down again, removed the scroll plate and tried to manually feed the jaws thru the t-slots. That's where I found the issue. I think the previous owner had run something into the chuck with the jaws extended out, damaging/re-forming the body around the t-slot. I used a fine file and smoothed out the slots untill I could just feed the jaws thru them. I'm sure this was not the correct way, but I think the alternative was to replace the chuck. Any way, the chuck works now. Thanks everyone for your input, Jim.
Click to expand...

I imagine the jaws were out wide and much load was forced against the chuck like you said. It appears that you have corrected the problem and the only telling factor will be the run out.

Good Luck!
 
November X-ray said:
I imagine the jaws were out wide and much load was forced against the chuck like you said. It appears that you have corrected the problem and the only telling factor will be the run out.

Good Luck!
Click to expand...

I installed a piece of drill rod, and adjusted the chuck to about .0005", so it looks like it worked. The chuck is a somewhat simple design, I'm really happy with it. Thanks for your input, Jim.
 
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