I have a Black & Decker drill sharpener back when B&D made good products (1960's). It has two adjustable rails and is powered by a very old but good Millwaukee 3/8's drill. it was my dads. It has an angle setting which I'm pretty sure I set at 45 degrees. I only sharpened a cheep set of Chinese bits that were given to me as a gift. Completely useless on many levels. I agree I set them on the wrong angle. The new ones will start to cut but even on a slow speed and diamond cutting oil they will break off. Solution the trash recycle bin has a full set. Now I know how to sharpen a 1906-1907 complete set that a machinist that worked for Stanly Steamer gave me about 40 years ago in two solid oak chests along with huge & long bits. I have only used a few of them and they cut like a laser, well almost. My question is are different larger sizes of bits sharpened at a different angle? Thank you yar for the U tube lesson. Doc
