I always thought it would be great somebody made a bit that was a sort of
oversized high speed steel rabbeting bit that you could grind the shape you
wanted into. If it exists, I've never seen it. Duh, time to googlesearch
"custom router bits."
On 12 Aug 2004 14:40:59 GMT, firstname.lastname@example.org (BUB 209) wrote:
such a thing will likely never be offered to the consumer market. the
odds of getting the geometry wrong are high and the conscequences of
that failure are gonna make the lagal department shit a brick.
On Thu, 12 Aug 2004 11:30:49 -0700, email@example.com wrote:
Probably so. But you could make your own by annealing an existing bit.
Grind the new shape into it, then harden and retemper.
Depending on what you are trying to do, you might be able to manage
with a shaper head for a table saw. I have made very delicate moldings
that way, by cutting one blade in "oil-hardening die stock" from an
I put blank pieces slightly short in the other two slots to try to
balance the head. Not perfect, but usable.
But, if you are not doing large production, making a scratch tool for
the exact shape involves little setup time.
Between those extremes is making or modifying a wooden molding plane.
The hand-tool options have obvious safety advantages, and are really
more pleasant if you don't have to do it all day.
Rodney Myrvaagnes NYC
"Curse thee, thou quadrant. No longer will I guide my earthly way by thee." Capt.
Something that hasn't been mentioned. If you want to grind your own router
bits, you better have a cutter grinder. If you try to freehand it, it may
work but it will vibrate like hell and trash your bearings in short order.
Consider the speed we are talking about here.
I've done it so many times with good results using a 1/2" HSS rabbeting bit,
quarter inch shank. But I would like
to see a larger blank bit with a half inch
shank. What I do is to lay out the
profile on a piece of stiff paper and cut
it out with an xacto knife to match the
height of the blank cutting surface. Then
I transfer the profile from the paper to
the bit using a fine permanent marker,
then sit at the grinder or dremel with
the reading specs on and a bowl of
ice cubes next to me to quench the
bit frequently as I grind away. Takes
about 45 minutes.
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