sploo
Somewhat extinguished member
Agreed. I usually wipe the end of the tool with a marker pen, and then a quick pass on the (in my case) Pro-Edge shows I've removed the smallest amount of material sufficient to sharpen the tool, and back to the lathe.There is another compelling reason for using a jig - economy. Why wear away a forty, fifty quid or more tool two or three times faster than you need to? If your grinder is mounted to a bench or board, find the perfect grind ......... your perfect grind, not someone else's ......... and glue a block at the required setting length. One gentle pass across the wheel and the job's done - the angle is exactly the same as it was before. You remove next to nothing. You might be the g.o.a.t. freehand grinder, but you cannot do that.
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Or it would be... if I'd had time to use the lathe in the last few years...