Drill Bit Sharpening Jig

A sharpening jig for small drill bits.
Designed for drill bits with diameters of 1, 1.5, 2, 2.5, 3 mm.
It will form a point angle of 118° and a relief angle.

With this jig you can precisely and symmetrically sharpen both lips of the bit, and you don't need a Dremel or a bench grinder. Sharpening is done with a 180 grit sandpaper on a flat surface.

Concept:

There are many drill bit sharpening jigs on Thingiverse that only constrain the point angle, so the relief angle depends on how you position the cutting lip.
Without a constraint on the relief angle your drill bit may not be functional or may have a wrong point angle (yes, it has an influence on the point angle too).
I needed a jig for small drill bits, where it's hard to see how the cutting lip is positioned during sharpening, so I made this jig that lets you verify the correct positioning before sharpening.

Usage:

1. Inesert a bit into the matching hole
2. The cutting lips must be parallel to the guide lines
3