|Forum topic by DrPuk2U||posted 10-24-2012 04:59 PM||2110 views||0 times favorited||7 replies|
10-24-2012 04:59 PM
My Holtzappfel bunch is nearing the end (thank goodness). I am mounting the Twin Screw Veritas vise. Because of the thickness of my top (3 3/4”), the vise chop ended up very tall – almost 8 1/2”. It is made out of very hard maple. All has gone well until I tried to drill the dog holes. In the chop for the end-vise, I cut a little slot. as suggested by the Schwarz, That was fine as the chop was only about 4 1/2” high. Also, it was relatively easy to drill the dog holes on the drill press with a Forstner bit.
With this bomber though, it was more of a problem. I just decided to drill the dog holes all the way through the chop from top to bottom. So I drilled as far as I could from top to bottom on the drill press, but that was only about 3”. Since the chop is 8 1/2” that means that there is 2 1/2” of really hard maple still to drill through.
So I got out my brace and bit and started drilling. Phew! Really hard work. Good aerobic exercise. But the real problem is that after a little while the bit won’t cut anymore. In two of the holes it was after the spur broke through, so I a half inch or so from success. On the other two I am not close to breaking through, but the bits just refuses to cut down further. I tried sharpening the bit but that didn’t seem to help.
Note that this is a single-spur bit from Irwin.
Any suggestions would be welcome. TIA
-- Ric, Northern Illinois, "Design thrice, measure twice, cut once... slap forehead, start over"