I’ve got a bunch of old drill bits that need resharpening, and I’m wondering if Drill Doctors really work or are a gimmick.
I bought one, tried it, packed it back up, and returned it, close to a decade ago. Later, took a manual machining course at Franciss Tuttle, and got instruction and practice in hand-grinding drill bits. Works well for larger bits. If you're careful! Kind of hard to do on tiny bits, though. Look for a "four facet sharpening jig." That should fix you up.I’ve got a bunch of old drill bits that need resharpening, and I’m wondering if Drill Doctors really work or are a gimmick.
You can supposedly set the angle on the higher end Drill Doctor. Most common angle is 118°, IIRC, some (usually more expensive bits) at 135°. In all the drill bits I've bought or scavenged over the years, I don't believe I've ever gotten one of the 135° bits. OTH, if you work with a lot of different metals, you may well want to grind to different angles. Working in brass, or sheetmetals other angles can save time and effort on finish work.IF the angle of DDr and bit are the same.
Same as sharpening anything else.
Mostly a gimmick, because angle is crucial.
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