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Show us your T&C grinder set ups
RotarySMP:
Thanks for that recommendation. I'll give that a try. Do you also split the point on your four facet grind.
There are so many different ways to skin a cat with a T&C grinder, that sometime the most simple solution gets lost in the fog.
Mark
Fergus OMore:
Really, the Clarkson was not designed to do drills. It was designed to grind and then restore milling cutters.
Indeed you can 'do' lathe tools and you can 'do' drills but there are plenty of better ways.
Only a couple of days ago, I visited an old friend who was using a short wheel base Stent to do tiny bits of grinding which would have been lost on the BIG Brother Clarkson from which it is copied- and improved. My friend had an ancient Reliance jig 'tied' to the table of the Stent.
Again, I recall that in a different age, I recalled a then new Quorn having a similar jig 'tied' to one.
Don't get me wrong. I have a Mk1 Clarkson and I have a Quorn and oddly, I have a fabricated Stent.
What is probably pertinent is that Arnold Throp of Dore Engineering and also connected withIvan Law had made a Quorn but was using a very much more simple Kennet at a Harrogate Model Engineering stand.
Over the past few hours, I was following 'Peter's' suggestion to use a three way vice ex RDG Tools to do his lathe tools.
All well and good, you may think but can a whatever you have 'mirror finish' a piece of steel in the lathe?
For what it is worth, I rough grind- to shape and then change the grind to say a wheel with a 80 grit wheel and then finish with a diamond wheel.
However, NONE of this can easily break the sharp edge to a lathe tool which will literally remove a barely perceptical dusting of swarf. I do it by hand on a 600 grit diamond stone and then traditionally finish on a conventional Arkansas stone- by hand.
Indeed, I could use an undrilled cast iron face plate impregnated with perhaps green diamond paste.
Something more to think about? Your comments would be appreciated
Norm
RotarySMP:
I also touch up the surface on HSS lathe tools with a whetsone after grinding.
Funny to think of the Clarkson as big. I find it rather small and cramped for some operations. I don't have the space or inclination to have multiple specialised tools set up for lathe tools or drills, and am happy with using the Clarkson for these tasks as well.
The mate I bought it from replaced it with the Tos BN-102, which must weight at least a ton (his is in much better condition than this one...
https://espmach.com.au/images/Grinders/2012%20Grinders/Tos-T&C-Grinder.jpg
Then he puts the 80 kg Haller spiral grinding attachment on it, like this one:
https://www.cottandco.com/en/lots/haller-type-ufs155-universal-spiral-cutter-grinder
What a dream to use. You can dial in any lead angle from -90° through to 90°, has no backlash, feels near frictionless (although still not quite like the TOS air bearing attachment. His regrinds are not perfect.
Mark
Fergus OMore:
What has me intrigued is the Beijing Deckel clone. More of this later?
Regards
N
RotarySMP:
Yesterday I stripped down the RGA to wash off all the preservative wax. It was a real magnet for grinding dust. Ground a radius on a lathe tool. Man I could get hooked on this. Next I need to make the missing setting bar slide.
Shame I ran out of time to try the four facet drill grinding method.
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