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Re: precision spindle -Proof of concept -

Posted: Tue Dec 08, 2020 9:09 pm
by jsburger
JPG wrote: Tue Dec 08, 2020 9:01 pm I have to check this, but IIRC the tool rest arm bore is 3/4". The tail stock adapter begins life as 3/4" round bar stock and the 5/8 chuck end and the tailstock #2 mt are machined from it. A 3/4 " shoulder remains.
Yes, that appears to be the case from Ed's last picture. However, is that shoulder long enough for the arm set screw to engage it? Apparently it is since he did it.

I will have to check tomorrow.

Re: precision spindle -Proof of concept -

Posted: Tue Dec 08, 2020 9:26 pm
by JPG
If you let the the tail stock adapter drop far enough, the set screw will secure it. The 5/8 portion will be slightly shorter proud of the arm, but there is enough to secure the faceplate.

Re: precision spindle -Proof of concept -

Posted: Tue Dec 08, 2020 11:00 pm
by reible
It is a bit of a balancing act but it works. The trick is to get the arm set screw to catch the shaft and the face place set screw to get enough grip on the flat.

The idea is in one of the older the PTWFE, they don't use the face plate but simply clamp to the arm. When I have time I will try and find it and give you a page reference and edition.....

Ed

Re: precision spindle -Proof of concept -

Posted: Tue Dec 08, 2020 11:22 pm
by reible
This is the book, might be in other editions too?
book2.jpg
book2.jpg (120.43 KiB) Viewed 2611 times
Page 201:
book1.jpg
book1.jpg (181.39 KiB) Viewed 2611 times
Ed

Re: precision spindle -Proof of concept -

Posted: Wed Dec 09, 2020 3:32 pm
by hfmann
[Note: Based on feedback, this post was very confusing, so with JPG"s wise suggestion, I edited the original wording of this post.]

Ah - Now I understand. Was easy to take 3/4 threaded rod and grind one end down to 5/8. Made an adapter to connect a face plate to the tool rest arm SIMILAR to Reible using a tailstock chuck adapter for the same purpose. i.e. the low $$$ approach! Easy peasy. Thanks all.
3/4 threaded rod ground to 5/8 at one end
3/4 threaded rod ground to 5/8 at one end
3_4 thread to 5_8.jpg (139.17 KiB) Viewed 2588 times
perfect fit into faceplate
perfect fit into faceplate
fit to faceplate.jpg (176.85 KiB) Viewed 2588 times
hal

Re: precision spindle -Proof of concept -

Posted: Wed Dec 09, 2020 7:40 pm
by JPG
hfmann wrote: Wed Dec 09, 2020 3:32 pm Ah - Now I understand. Was easy to take 3/4 threaded rod and grind one end down to 5/8. Easy peasy. Thanks all.

3_4 thread to 5_8.jpg
fit to faceplate.jpg

hal
WTH?? :confused:

Re: precision spindle -Proof of concept -

Posted: Wed Dec 09, 2020 8:32 pm
by hfmann
It's how I made my own tailstock adapter to work for Ed Reible's way to mount a gouge to the tool rest arm. Does that make sense now?

hal

Re: precision spindle -Proof of concept -

Posted: Wed Dec 09, 2020 8:42 pm
by jsburger
hfmann wrote: Wed Dec 09, 2020 8:32 pm It's how I made my own tailstock adapter to work for Ed Reible's way to mount a gouge to the tool rest arm. Does that make sense now?

hal
Tail stock adapter??? No it does not make any sense. :confused: :confused: :confused:

Re: precision spindle -Proof of concept -

Posted: Wed Dec 09, 2020 10:11 pm
by JPG
jsburger wrote: Wed Dec 09, 2020 8:42 pm
hfmann wrote: Wed Dec 09, 2020 8:32 pm It's how I made my own tailstock adapter to work for Ed Reible's way to mount a gouge to the tool rest arm. Does that make sense now?

hal
Tail stock adapter??? No it does not make any sense. :confused: :confused: :confused:
Change the wording - Made an adapter to connect a face plate to the tool rest arm SIMILAR to Reible using a tailstock chuck adapter for the same purpose. i.e. the low $$$ approach!

Re: precision spindle -Proof of concept -

Posted: Thu Dec 10, 2020 9:21 am
by hfmann
JPG wrote: Wed Dec 09, 2020 10:11 pm
jsburger wrote: Wed Dec 09, 2020 8:42 pm
hfmann wrote: Wed Dec 09, 2020 8:32 pm It's how I made my own tailstock adapter to work for Ed Reible's way to mount a gouge to the tool rest arm. Does that make sense now?

hal
Tail stock adapter??? No it does not make any sense. :confused: :confused: :confused:
Change the wording - Made an adapter to connect a face plate to the tool rest arm SIMILAR to Reible using a tailstock chuck adapter for the same purpose. i.e. the low $$$ approach!
Thank you. I will do that. Appreciate it.

hal