Drill Sharpening Guide 118° with graticule

You can buy these for about £6 in metal, but if you'll like to print one then try this! Costs about 5p :o)

The graticule scale isn't terribly important because all that matters is that the tip point is at the same distance from both sides of the drill. Mine is tweaked from printable-ruler.net by adding half-millimetre marks in a photo editor and printing it onto paper and glueing it onto the printed guide, so the mm marks are accurate but then I realised it didn't matter, hahaha, just print anything with regular very fine marks that you can count to compare one side of the drill with the other. It was no use trying to include the marks in the 3D print as they'd be too fine to show.

I used PLA+ with 0.2mm layers and a 0.4mm nozzle, any reasonable settings should work, no infill or support needed. 

There's a faint slot in the top surface and some text which is actually a zero and an arrow, originally intended to show the exact zero mark for the scale, the arrowed (leftmost) edge of the slot being the exact zero, but it doesn't come out very well and again it really isn't important anyway because all you need is a relative measurement.

Hope it comes in useful for someone! I designed it to help me sort out my manky old drills which are now all nice and sharp again!