On 2009-08-11, Doug White wrote:
"DoN. Nichols" wrote in
:

On 2009-08-10, Mike Henry wrote:

[ ... ]

Glendo runs their diamond wheel slow, 300 rpm I think, and I've used
it on HSS for a touchup with no ill effects. Do you think that the
slow speed is OK?

What is the diameter of the wheel? RPM alone does not suffice.
You need the SFPM (Surface Feet Per Minute) to judge speeds.

They have 5" & 6" wheels, depending on the model, and they have the
diamond on the flat face. They will be definitely be running a good bit
slower than an 8" regular grinding wheel, especially because you don't
spend all your time out at the edge. They are also designed to run wet.

O.K. So surface speed would be a maximum of 471 SFM at the
outer edge of the 6" wheel. The running wet makes a big difference,
too. That would probably work well enough even with HSS. (Harold --
does this sound workable?)

Enjoy,
DoN.

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