Mike, David. Thanks!
I've now used it for the first time. Very easily managed M6 in mild steel, tapping this next little job.
I have a 6" bench grinder. The wheels are too hard, don't
cut. And when they do, there's grit over the very limited bench space, and car........
So, when I
really need a grinding session, I set up in the middle of the back lawn. So there's no rusty patch left behind on me driveway.
I have been using a 50mm dia diamond disc in the lathe chuck, for the past few years for tool/ drill sharpening. It does the job admirably!
Occasionally though, a little more
roughing power is needed..........
I bought a couple of sets of angle grinder disc nuts, and mounted them on stub arbours.........
Gonna Do's.........Didn't bother with the M14 thread, just a slide on fit, and an M6 screw and heavy washer.......
Gonna Do's.........Slips into the chuck........
Gonna Do's.........Diamond rougher disc.......
Gonna Do's.........Not quite so rough, diamond disc........
Gonna Do's.........Old faithful, finisher..........
Gonna Do's.........Works for me!

David D