Drill bit sharpening jigg

I print these in ABS, 0.3mm layers. Printed on their side to avoid supports. Place the side closest to the numbers towards the hotbed.
Standard all purpose drill bits usually have 118 deg point and 12 deg lip. Hard metal bits often have 135 deg point and 9 deg lip.

You can make split point, self centring bits by first grinding a 20 deg relief angle and touch up the lip to 12 or 9 deg.
Like this:
https://youtu.be/6iuLoo-qI2s

If you are drilling deep holes you can reduce the heat and force needed to push the bit by using a 55 deg relief angle.