Copied from here as well as youtube and made myself a nudger for helping to center round stock in the lathe chuck. Thanks for the ideas!
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Made a Nudger
- Thread starter Pontiac Freak
- Start date
Yes. You run the lathe at low speed, with the workpiece held, but not tightened, in the chuck. Slowly advance the nudger until the wobble stops, and tighten the chuck. Mine works great!
It can also be used to seat a disc in the chuck. Put the nudger in the perpendicular tool holder, and press it in towards the chuck.
I made two, and mounted them in a QCTP holder, so it's easy to select the one I want.
It can also be used to seat a disc in the chuck. Put the nudger in the perpendicular tool holder, and press it in towards the chuck.
I made two, and mounted them in a QCTP holder, so it's easy to select the one I want.
Sorry,I fail to see how nudging something sideways makes the chuck clamp it on center. Nudging rings and such straight INTO the chuck is an old trick. I usually just do that with a corner of the tool holder,or the rear end (not a sharp corner) of a cutting tool.
George,
I nudge it until it stops wobbling. Not perfect, but close enough for my skill level (very low!)
[video=youtube;q5Rj-otJ8Oo]http://www.youtube.com/watch?v=q5Rj-otJ8Oo[/video]
I guess I'm dense,but I still can't see how the tool helps make the work run truer. Thank you for the video.
It's use is based on certain things being true. One is that the chuck jaws themselves being capable of holding the work centered, yet being loose enough to be pushed around. On a tight chuck with jaws that are simply not running true, it is of limited or no real value. Or with a 4 jaw, if the work is not indicated true, you can't push it into true running with this tool. If you indicate the work right at the jaws, and then move out several inches and find the work running out, then perhaps you can improve things a little with this tool, but the fact that the work is running out at that point indicates a problem with the jaws. I'm not saying that any 4 jaw will hold work perfectly straight way out from the jaws even if new, but in any case, the work should be tight, and not all that easy to push around, with any tool.
For pushing the face of a workpiece into true, yes, this tool may help, but not so much for axial runout.
For pushing the face of a workpiece into true, yes, this tool may help, but not so much for axial runout.
The tool sure helps when trying to get a thin disc to
run straight in the 3-jaw, especially when the material can,t be set on the step of the jaws. They are time savers for thin work as mentioned. Though I agree with Tony, you would find more use of this tool for getting the face to run true, than you would other wise.
Never the less, it still a very usefull tool that I find my self reaching for time and time again. Why? Its fast and easy to get the min runout. I rather use this type of tool over not, and have to loosen the chuck and reposition, and start the lathe each time to eyeball it.
Some love them, some dont.
run straight in the 3-jaw, especially when the material can,t be set on the step of the jaws. They are time savers for thin work as mentioned. Though I agree with Tony, you would find more use of this tool for getting the face to run true, than you would other wise.
Never the less, it still a very usefull tool that I find my self reaching for time and time again. Why? Its fast and easy to get the min runout. I rather use this type of tool over not, and have to loosen the chuck and reposition, and start the lathe each time to eyeball it.
Some love them, some dont.