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hilsch vortex cooler. holy smokes! Was it noisy? John B

Most carbide tools are high-temp BRAZED! I, too worked in a machine shop, and ordered many of the tools, including M-5 for some special jobs that could not be cooled with coolant. I, also, ordered,

"The green wheels don't actually grind the carbide, they pull little pieces of carbide away & grind the binder." What binder? Carbide is a sintered material, which means that tiny pieces of carbide

A cheap alternative to a diamond wheel is the diamond knife sharpening blocks sold widely in places like harbor freight for 15$. They have a mix of grits, and are perfectly adequate for sharpening

I vote for 60, maybe 80 but not 120. I have a 120 and it's way too slow. Do any fine tuning with a diamond lap.

For bushings, particularly those carrying shafts that rotate at high speeds, I prefer to use Molyslip gearbox additive - straight from the can - rather than grease. This is quite a viscous fluid and

go diamond if you can. jb

The green wheels don't actually grind the carbide, they pull little pieces of carbide away & grind the binder. Roy

Without the slightest doubt. KrazyKyngeKorny (Krazy, not stupid)

I believe we are in agreement here...aren't we? -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand

Whenever you use a grinder, you should use a particle mask. Even though many kinds of dust are non-toxic, over a long period, they can lead to lung disease, including cancer. Do as you like, but, be

Best to have two green wheels- one 60 or 80 for roughing, and, a 120 for fine finish. The 120 will work if you grind slow, so you don't burn the carbide. overheating carbide makes it brittle.

Pretty much any dust is toxic in some way (may "only" be a severe irritant) so that's always good advice. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll

The low cost diamond wheels are typically about 4" resin bonded, meant for cutter grinders. See Shars or CTC Tools. You could make an adapter and use a 4" wheel on your present grinder, or rig

As long as you're happy that's all that matters. Good to hear that the supplier was eager to step up and take care of any problems you had.

Any recommendations? My grinder takes 6" x 3/4" wheels. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand

I use 80-grit belts on my sander for HSS stuff and that seems to work fine (I'm not trying for super polished razor edges here). Being as carbide is so hard it *seems* that the finer grit would be ok

The consensus on green wheels for carbide is that they work but cause micro cracks leading to early failure of the edge. Better to use diamond -- diamond wheels are reasonably priced now and should

Dunno, myself, I just bought the ones HF sells with its tool grinder, and they've worked OK. They never said what the grit size was, but it's worked just fine for me. Mert

I'm thinking of getting a green wheel for my bench grinder for carbide cutters since I'm getting more of them. Which grit is the best for tool sharpening, I see Enco has them in 60, 80, and 120. I'm