Gallery, Projects and General > The Design Shop

An idea for drill sharpening jig

<< < (2/11) > >>

Darren:
Why not just use the drills own flute to follow as other manufactures do?

sorveltaja:
Doesn't the drill's flute have much longer pitch, than cutting surface has?

Once I had one of those horrible cheap sharpening jigs, and just couldn't get any good results with it. Neither I understood, why it was so clumsy device to use.
Theory that I've read about drill sharpening, talks only about degrees, nothing about that drill's cutting surfaces would have a pitch. They aren't flat at any degree.
Or am I missing something :smart:?

Darren:
Sorry I think I've misunderstood what you are trying to do? I thought you meant sharpening the flute itself.... :doh:

John Hill:
Possible procedure.....?

Put drill in lathe chuck.
Set threading gears for required pitch, 4.65mm?
Set up tool post grinder
Turn spindle by hand to take up any backlash while grinder moves towards first flute
Carefully turn spindle to grind first flute.
Disengage threading feed drive at gears or gear box
Carefully turn spindle back half a turn
Reengage threading feed
Turn spindle back to gather up backlash
Turn spindle forward again and (maybe?) it will be in position to grind second flute. :scratch:

sorveltaja:
No problem. Just trying to find simple(?) way to sharpen pile of used drills :dremel:. I guess that sharpening flutes requires highly specificated grinding machinery, so I've skipped it.

Navigation

[0] Message Index

[#] Next page

[*] Previous page