Tailstock Offset Tool

ddickey

H-M Supporter - Gold Member
H-M Supporter Gold Member
Could you somehow use a tooling ball in an offset tool? Maybe in the HS and TS? I didn't know these existed, saw them on the MC site.
1519870956801.png
 
Modify or build new tailstock MT with a hole to accept the tooling ball and then offsetting the tailstock???
That might work.
I have used a boring head with MT3 adapter in a tailstock for offsetting. A tooling ball that fit into the boring head would make that nice.
But the boring head used as offsetter is not very rigid and best for light use or tool post grinder possibly.
 
I have used a boring head with MT3 adapter in a tailstock for offsetting. ... But the boring head used as offsetter is not very rigid and best for light use or tool post grinder possibly.

I've got a vintage shop made boring head with an integral MT4. It's nicely done. I've wondered if it work for offsets. But have wondered if it would spin in the tailstock. Like you said "best for light use".

Daryl
MN
 
this is what i use, ball center in headstock, off set center in tailstock, just the opposite of what you are thinking

101_0750 (1).JPG
 
Kernbigo
I can see using a ball center in the headstock, but My problem would still be how to keep it from turning/slipping in the tailstock.
 
Kernbigo
I can see using a ball center in the headstock, but My problem would still be how to keep it from turning/slipping in the tailstock.

Build it with a clamp behind the offsetting device that will clamp on the od of the tailstock ram. The clamping device would be integrated into the MT and when fully inserted into the ts quill the clamp would extend over the od of the quill and getlocked down. I have considered making one from a surplus boring head and have visualized a problem with rotating as you mentioned, this was the solution I came up with in my mind, I have not built it yet
 
your not looking at what i use correctly you need nothing in the tailstock except the off set center like in the picture, the tailstock doesn't rotate. You put a face plate on the headstock and drive the part between the ball center in the headstock and the offset center in the tailstock.
 
Kernbigo
I can see using a ball center in the headstock, but My problem would still be how to keep it from turning/slipping in the tailstock.

Maybe a stack of 1-2-3 blocks from the lathe bed to the slide? And shims, of course. Old-school.

The 'clamp to the ram' approach doesn't appeal to me: there's only a tiny metal pin
aligning that, it'd shear under power if ever I was depending on it.
 
Dead centers have been used in tailstocks since the beginning of time. Don't forget the white lead.
 
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