Sharpening Lathe Tools

[Mark CParticipant @markc]

Neil, to be fair they are talking about grinding machine use where you can determine the feeds etc.

As John pointed out above, the chart is really for grinders rather than off hand machines but it gives an insight for those who have never had much training or experience in grinding.

The chart is not out of date though, it is current and if you want to go looking around the Norton (Saint Gobain) site you will indeed find the catalogue along with a host of other stuff. A quick search of the Internet should bring Midland Abrasives up (http://www.midlandabrasives.com/) also useful for information.

As for choice, I don't know how much choice you really need in a home workshop, you are not looking for industrial performance as you are probably stuck with a small bench grinder anyway. most industrial abrasives are getting fairly advanced anyway, blue (microcrystaline ceramic mixes) are often the wheel of first choice as a general all round tool room wheel (it is what I have ordered for my J&S) or CBN or Diamond wheels for the specialist tool makers.

Mark

Edited By Mark C on 02/11/2015 17:31:12

[Neil WyattModerator @neilwyatt]

> Neil, to be fair they are talking about grinding machine use where you can determine the feeds etc.

Indeed, I was thinking about doing a better job of dressing the wheel on my tool grinder.

I feed too slow and hadn't picked up on using a drag angle.

Neil

[Mark CParticipant @markc]

Ok, I took it to be a comment related to off hand grinders, never crossed my mind you might be thinking T&C grinders! As far as drag angle, if you dress a surface grinder you always have the point behind the wheel which gives a drag angle but I had never given the angle much thought, just "a bit behind" to make certain it can't get "all exciting like" which would be bad at best!

Mark

Edited By Mark C on 02/11/2015 17:45:08

[VicParticipant @vic]

They talk about friability of the abrasive here which makes sense.

**LINK**

[Roderick JenkinsParticipant @roderickjenkins93242]

Vic,

Good link – thanks

Rod

[Roy MParticipant @roym]

You can get CBN wheels specifically for grinding tungsten carbide. An 80mm wheel run at the correct surface speed will give years of good service, and won't fill your workshop with carborundum dust! Roy M

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