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Originally Posted by Murray Kish
Grinder basics....
How in the ($@&%(* do I measure/set the angle of my steady rest to the grinding wheel? My rests are almost infinitely adjustable, but I have no idea how to set it to get a specific degree of cut?
ie. I have one of those cutoff 'bits' that are typically used on heavier/bigger lathes, and I want to thin it down to make thin/narror grooves (like 1mm or less). I would like to set the table so that the wheel takes slightly more from the bottom of the cut, than the top (to give it some relief).
The only way I've figured out so far is by trial and error? Is there a way to set up the table so that it will cut a specific angle?
Thanks
Murray
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Murray, any good lathe book will give you very specific grinding angles for each kind of tool, and there are different recommended angles for each material you want to cut - which makes things even more complicated. I've got some diagrams somewhere if you want them scanned.
I've got the same problem and my grinder has THE most useless tool rests (a bit of old 1/8 steel sheet bent at 90 degrees) I've seen accurate tool holders that adjust in 3 planes on tool sites but can't an example to hand right now. If I get my milling machine sorted I may make something up instead. In the meanwhile I've got a couple of those old angled wooden kitchen knife holders knocking around the garage, so I may fashion a guide from them! Yeeeehaaa!
An alternative is to use a small griding wheel in the lathe chuck and put the tool in the tool post to grind - a lot of people seem to use this method but there's no way I'm having grinding grit all over my lathe!