Drill bit sharpener - anything out there that actually works? Answered
I have no problem fixing the bigger drills I have once they get blunt from use.
But once we go into the range of 5mm and below it is quite tricky.
The grinding wheel that works well for a 10mm drill can be way too coarse to deal with a 2mm drill...
I looked a quite a few commercially available sharpeners, even tried a few in store but they just don't satisfy :(
Most create a rather rough surface finnish which makes the drill go blunt even fast, although it cuts really well for the first hole LOL
Especially when it comes to producing more than a standard edge this toys seem to be useless.
Ever tried to use a 13mm drill that has no back cut and no center cut angle added? It's a pain...
Last night I went through some now vintage photos and remembered that my grandfather had a metal rig for the drills.
It screwed onto a mount for these stand up and "see through" slotted disk grinders people had in their workshops back then.
The drill was fixed in place by a pin in the flute, so stoppers could ensure you are always grinding at the correct angle.
Not just the angle for the cutting edge but also the angle in relation to the flute.
Once this initial sharpening step was done you clicked the whole thing sideways to get the back cut angle added and a stopper ensured you won't be able to grind off too much.
It was not able to do these fine center cuts that allow you to get away without a pilot hole but the drills were sharp as and kept their bite for a long time.
Does anyone still have one of these things in their toolbox or vintage collection to provide some detailed images?
Would love to design something similar but reall struggle with the mechanical side of things.
The original had the option for three different edge angles to be selected.
The "lenght" was set by letting the drill touch the disk (off), locking it and then by using a clicking screw to drive the drill up in I think 0.1mm increments.
It was very, very easy to get perfectly sharpened drills with it and I would love to be able to use something like it again :(
The only thing getting a bit close to this that I found so far comes from China - of course it does...
A crappy and cheap grinder similar but smaller than an electric chainsaw sharpener.
A grinding disk about twice the size of a dremel one does the cutting.
To make sure all is even the drill is aligned so its center is right on the edge of the grinding disk.
On the free side is a simple stpping plate.
Might work somehow but something tells me tht the center of the drill will never be perfect.