dcrane wrote:"I agree! It's a lost art though! If you ask most people if they can sharpen drill bits they will say no. It was one of the first things I learned as a machinist in the Airforce . I sharpen brand new bits because I feel like they are shaper when I sharpen them than they are new! In fact I really pride myself In sharpening bits I am stilling usin the same set of bits that I use for stainless . I usually never have to buy drill bits.
OMG...I did the same thing when opening new bits the first thing i'd do is put my own taper on them and reduce the angle of the cutting edge (better then brand new and cut like a hot knife through butter) Thats funny to learn someone else did the same tricks I did when i was a kid (drill manufacturers must not have tested their bits to much or you think they would have realized what worked best )[/quote]
The thing is as im sure you allready know is you can increse the angle for faster cutting in soft material but if you have to have a lower angle for harder material so i figure they just factory grind them to cut everything halfway well.
Did you know if you sharpen one side a little more than the other it will cut oversized, that can be handy to know if you are making bushings that need a little bit of slop but you dont want to buy the correct ream.