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Safe and simple. Much safer than putting various (potentially flying) objects under the jaw.
Shims made from 1 mm thick 316ss plates.
You can use as many shims as needed. Mathematics is simple, but you can also learn from trials and errors like I did.
https://www.youtube.com/watch?v=jYzs...ature=youtu.be
Cheers
LMMasterMariner
The mathematics (which you don't seem to describe) may be simple if you're using TLAR standards but they can become complicated if trying to compute the packing size accurately...
https://s3-us-west-1.amazonaws.com/f...e/133109-1.jpg
https://s3-us-west-1.amazonaws.com/f...e/133109-2.jpg
https://s3-us-west-1.amazonaws.com/f...e/133109-3.jpg
Actually, a much better approach is the tube method...
https://s3-us-west-1.amazonaws.com/f...e/133109-4.jpg
https://s3-us-west-1.amazonaws.com/f...e/133109-5.jpg
Programs to do the associated math for both these methods are available on my page in the ECCENT archive.
Better yet, do it right and mount the 4jaw which was designed for this sort of work.
You are right. Four jaws chuck should be used for this job. I have it but many people don't.Quote:
Originally Posted by mklotz
Also, title of this post is Eccentric Turning Setup for 3 Jaws Chuck.
Don't know if your calculations are based on arrow point like in your sketches
or calculations are based on true geometry of the jaws.
I am using graphic method for rough calculations of packing size.
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Thank you both for this! In my stack of projects is a need to machine a small offset shaft; and yes, all I have is a 3-jaw...
I like the graphics method better, the maths may be correct but have not enough time to read it let alone calculate it.Quote:
Originally Posted by LMMasterMariner