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Collet block fine tuning
- Thread starter DPittman
- Start date
DPittman
Ultra Member
I'm not sure what you mean. I think maybe you are referring to making the factory drive plate clamp on the center ? If so I think that would have the potential to twist/cant the shaft.
I'm both tired and dumb right now so it might become more obvious to me tomorrow morning when I'm fresh and just dumb.
DPittman
Ultra Member
Ah it came to me what you are suggesting! Yes that would be possible. I think the center should have a flat spot on it for the tightening bolt. Surely a bolt onto a hardened surface can't ever hold very tightly?
Last edited:
DPittman
Ultra Member
Well I went ahead and "machined" flat spots with an angle grinder on my shaft and dividing head center. That made the difference in being able to hold the set up securely.
Even though I had a nice sliding fit between the shaft and the collet block, I decided to use some medium strength loctite to take up any clearance slop that there was.
First passes of .010" deep showed that was not going to be enough to true things up, so I went to .020" and that was enough until side 3 which then needed another .015". So I went around them all and in the end it took .035" to get the sides all true.
It's probably overkill for anything I will ever do, but it's nice to have precision when you can.
Now onto the hex block which I think will be truer to start with.
Even though I had a nice sliding fit between the shaft and the collet block, I decided to use some medium strength loctite to take up any clearance slop that there was.
First passes of .010" deep showed that was not going to be enough to true things up, so I went to .020" and that was enough until side 3 which then needed another .015". So I went around them all and in the end it took .035" to get the sides all true.
It's probably overkill for anything I will ever do, but it's nice to have precision when you can.
Now onto the hex block which I think will be truer to start with.