Aligning threads in shaft

RocketQ said:
Hell 1 or 2 10,000 ths makes a wobble.

John
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pluck out one those scraggly beard hairs and mail it to bob for a shim
:D
yeah, youre right about that buddy
maybe one our resident math whizzes can figure out just how much it lifts tip
i had a blooper of rubbing compound , that i didnt see, on the face of butt last week
it flopped like a fish out of water
 
dzcues said:
A tapered collar is useless unless the taper matches your shaft taper and diameter. I encourage all budding cuemakers to make their own collets. It's a pretty basic operation. If you can cut the taper on a shaft or a butt, you have the tools to make perfect collets. Practice on scrap wood if you're not sure of yourself & when you have it right, use your material of choice.
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I figured this out very early on, and it's been crucial. I might add that I don't split the collets, either. It's just a piece of phenolic or delrin with a bored, tapered hole that matches the taper of my cues. The work piece press fits into the collet for perfect alignment every time. Same procedure for installing joint pins.
 
shaft video with shim

Here's a quick video using .0015" thick waxed paper for the shim. Both before & after with no cutaways. Sorry my fat hands are getting in the way but you'll get the point.
shimmed joint face video
 
A .001 error at a .843 jointface is .034 inch runout/side at the tip.
Also a strained shaft, held in chuck and the tip is forced to run true, with a .017 runout in the middle of the shaft will cause the same effect.
If the tip is not set true before a steady or support is applied, the runout error will be what it was before the steady or support is applied.
Great videos for people to see what is actually happening.
Neil
 
conetip said:
A .001 error at a .843 jointface is .034 inch runout/side at the tip.
Also a strained shaft, held in chuck and the tip is forced to run true, with a .017 runout in the middle of the shaft will cause the same effect.
If the tip is not set true before a steady or support is applied, the runout error will be what it was before the steady or support is applied.
Great videos for people to see what is actually happening.
Neil
Click to expand...
thanks neil, how did you calculate that?
i used to be good at math, a longgggggg time ago :embarrassed2:
 
BHQ said:
thanks neil, how did you calculate that?
i used to be good at math, a longgggggg time ago :embarrassed2:
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for this situation, I just go ( error/distance) * length so (.001/.843)*29

on tapering and need a specific taper on my set up I use (sin angle)*1200

Arctan is used when using the linear scale on a lathe and the cross slide for the difference per side to either set or figure out a taper angle.
 
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