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An idea for drill sharpening jig
sorveltaja:
Intention of this jig is to make it easier to grind drill's both cutting surfaces identical, regardless of the tip angle.
In this project, I have abandoned technical terms, that usually relate to drill's sharpening. Instead I have in mind, that drill is like a screw, whose tip angle(and the pitch) dictates, how fast it can dig into certain materials. Something like automatic feed. It also has a pitch. Lower the pitch, higher the feed, and vice versa.
I have clear image in my head about this thing, dirt simple, but in practise... we'll see.
tinkerer:
Cool. I am still confused about the pitch part unless you are talking about the angle of attack. Kind of like a prop on an airplane engine. Same angles involved on both blade, but appears to screw itself through the air. I'll be watching with interest on how this works.
bogstandard:
Sorveltaja,
I love what you are doing here.
You are taking a glimpse of an idea thru to trying out a prototype.
To me, it means nothing if you are successful or not.
The fact that you are trying to solve an age old problem by looking at it from another angle is the remarkable part.
I wish you success in your challenge, but don't be disappointed if it doesn't work as you have planned. Think of all the experience you have gained getting this far.
Bogs
NickG:
Hear hear :bow:
sorveltaja:
I skipped that plywood/tube -combination, and made it altogether a little more solid component:
Original plan was to make this jig for small (3mm(~0.11") and below) drills, but the chuck is bigger, and so will be the whole device.
:offtopic: To add even more confusion, I intend to use a small(dia. 13mm(~0.51")), slowly rotating(~100-200 rpm), diamond coated grinding drum for sharpening:
Ordinary grinding wheel would wear on such a low speed. Instead, the thing above seems to last. I have used (and abused) that thing with glass, plastic, wood, HSS, carbide, and various other metals.
Anyway, the jig itself needs still some work to get it ready for testing :dremel:.
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