Center back of shaft in lathe

gbs52

Registered
I have a Chinese lathe for tips and ferrules. Back of shaft wobbles. I did machine a piece of Delrin and tight slip fitted it into spindle hole as it’s 1.5”. I made four spider screws to help center but it’s time consuming. Gotta be a better and easier way to stabilize back of shaft. The chucks that adjust won’t fit. Any info is appreciated.
 
I have a Chinese lathe for tips and ferrules. Back of shaft wobbles. I did machine a piece of Delrin and tight slip fitted it into spindle hole as it’s 1.5”. I made four spider screws to help center but it’s time consuming. Gotta be a better and easier way to stabilize back of shaft. The chucks that adjust won’t fit. Any info is appreciated.
make another bushing that fits both the id of the spindle as well as the od of the shaft.
 
Chris Hightower sells a chuck that would slip over your spindle. I might have to bore the sleeve so it fits but that is what I did on my machine which also has a 1.5" spindle.

Alternatively, create tapered collets that match the shaft taper

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Chris Hightower sells a chuck that would slip over your spindle. I might have to bore the sleeve so it fits but that is what I did on my machine which also has a 1.5" spindle.

Alternatively, create tapered collets that match the shaft taper

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I’ve looked at his but doesn’t list a diameter to achieve going over the 1.5” ID spindle. Do you remember and specs for yours?
 
I’ve looked at his but doesn’t list a diameter to achieve going over the 1.5” ID spindle. Do you remember and specs for yours?
It fits 1.5 to 2 inch outside diameter spindles. You need 3/4 inch or more length of solid spindle..
 
I have a Chinese lathe for tips and ferrules. Back of shaft wobbles. I did machine a piece of Delrin and tight slip fitted it into spindle hole as it’s 1.5”. I made four spider screws to help center but it’s time consuming. Gotta be a better and easier way to stabilize back of shaft. The chucks that adjust won’t fit. Any info is appreciated.
If the shaft isn't straight there is basically no way you'll end up without a wobble.
Get yourself a longer length of delrin and make some bushings with different sized diameters inside to fit different sized shafts.
Been using a set of these for almost 30 yrs and they work fine. This is of course dependent on your machining skills to create them.
With a 1.5 inch spindle bore it sounds like you should have a good sized lathe to be able to do this.
One other thing that is crucial is the bore of the spindle also.

If it sucks....forget everything I just typed previous to this sentence and figure out a way to put an out bore chuck on the back side.
 
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