Posted by JDseller on October 20, 2012 at 20:08:09 from (220.127.116.11):
In Reply to: Drill Doctor posted by Popinjohn on October 18, 2012 at 17:30:13:
There is NO BODY in the world that can free hand a drill bit on a grinder and get it to cut evenly with both sides. One side or the other will be slightly longer/taller than the other. With a fixture you can do a pretty good jump keeping them even but they will not have a relief taper unless you grind it separately.
For those saying that a Drill Doctor take a long time to setup. How does it take a long time to setup???? I have one I can take it off the shelf an slide a drill bit into the setup holder and sharpen it in less than two minutes. Nice even sharp drill bit with the correct reliefs. Almost all of my high speed drill bits are all the same angle. If they are not they are after I sharpen them the first time. I will take them on my bench grinder and get the angle close and then finish it on the Drill Doctor.
I have a display case that was in a hardware store for retailing drill bits. It has small drawers for each size of bit from real small up to 5/8. So I have many drill bits of each size sorted in a handy storage place. I then have a box right below that display. If I dull a bit or it is not cutting correctly I pitch it into the box. Every now and then I sharpen every drill bit and sort them back into the display case.
Tip for repairing broken drill bits. Just grind them slowly on your bench grinder until they are close to being even. Then finish them in the Drill doctor.
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