"Bob La Londe" wrote in message ...

On 4/14/2020 6:02 PM, Jim Wilkins wrote:
"Bob La Londe" wrote in message ...

...I recently picked up a surface grinder,
and I am making plans for making a cylinder grinding attachment for it.
It would be ideal for finishing hardened tool holders like this.

Might actually use some of my grinder vises like they were intended. LOL.

==============================================

This is the unpowered cylindrical and straight/spiral flute grinding
fixture for my grinder:
https://www.pinterest.com/pin/660903314050135724/

I've only resharpened large taps and wood jointer blades on it and don't
know how well it would spin and grind a cylinder with the wheel head
rotated to an angle.


Most cylinder grinder attachments I have seen for small surface grinders
count on you to dial in the axis of rotation perfectly parallel to the Y
axis travel. They assume X is locked and you will grind in Y only. Of
course this only allows for short cylinders or tapers. There are some
other ideas I am considering, but short of CNCing the machine (not out
of the question) they start to get rather 'Rube Goldberg'ish.

==========================================

The axis needs to be at least parallel enough to keep the contact within the
wheel width. On my grinder the head and column also rotate horizontally so a
dish or cup wheel can grind on one side only, and clear the center support
on the other side. It's sort of a Shopsmith that does many things, none
really well.


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