"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
Ignoramus18788 fired this volley in
:

Lloyd, I am very interested, myself, as to

1) Whether one can do a good job sharpening dull end mills
2) How long does it take.

Keep us updated.

Well, I committed to the payment, so I guess I'll be learning to do it!
G

I'll keep you informed.

From one friend, he estimates less than five minutes to 'tune up' a
slightly-dulled 3/4" 4-flute bit that is not chipped. I will find out.

I will have to invest in a measuring device to handle 3-flute bits, or
I'll have to work up the math to figure the new o.d. with a micrometer
after the flutes have been ground.


Lay it on a surface plate, touch off on the od with a height gage for a zero
reading and then take another reading off of the flute. Now, double the
difference and subtract it from the shank dia.