On 2008-10-15, Christopher Tidy wrote:
Richard Edwards wrote:

[ ... ]

When you say 3/16 long I assume that you mean 3/16 a wide tip.
Take a 3/16 dia screwdriver. Slide an appropriate drill stop onto
blade. With your off hand grinder "off", Put the blade to the wheel
with the tip near tangential and the shank resting againstthe tool
rest. Tighten the drill stopjust resting under the tool rest.
Run the grinder and grind each side of the tip until .025 or less
achieved. Now grind or stone the tip face until .025 or to fit screw.

I can't quite get my head around what you're doing here. How can you
have the screwdriver tip tangential to the grinding wheel, and the shank
resting on the toolrest? Surely the two positions are 90 degrees apart?

Yes -- about. Maybe down to 60 degrees or so. The shank is
resting against the lip of the toolrest as he described it, with a
slid-on collar resting against the toolrest to keep the extension of the
screwdriver blade long enough.

Enjoy,
DoN.

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