Santa dropped off a Drill Doctor 500X.
For years I have been waiting for Drill Doctor to come out with the
sharpener that would sharpen a brad point bit.
I gave up.
After buying some COLT 5 Star brad point bits and seeing all the grind
angles to produce that cutting tip I think the machine would be too
expensive if it ever surfaces.
The Drill Doctor 500X is stupid simple and fast and will sharpen most any
common twist drill bit including carbide tipped masonry bits.
The results I was getting yesterday on my first through last, about 30,
yielded results that felt sharper than a "never been used" set of Hitachi
A sharpened 1/4" bit through 1/4" steel was relatively quick and with out
heat. The steel was mildly warm as was the bit after making the through
hole with out lubrication.
That same bit through a rabbet without bottom support, to reduce tear out,
on a piece of oak yielded an entry and exit hole with less tear out on both
sides than any of my "common" brad point bits have ever been able to
produce. The COLT 5 Star brad point bits still produce holes similar to
those cut with a Forstner bit.
Using a sharpened 1/2" twist bit on the piece of oak yielded the same
results on entry, I did not go through however.
This particular model sharpener also lets you add a split point to any
normal twist bit. The split point helps prevent the bit from wandering at
the beginning of the cut and reduces the need for a punch point normally
used as a starting position in steel.
Soooo it looks like I may go back, after 25 years, to using regular twist
bits for those odd sized holes when drilling holes in wood. AND because
the sharpening operation is so quick and easy I may resharpen every bit
before it goes back in the box.