"George" george@least wrote in message
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"Dan" wrote in message
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On Mon 23 May 2005 05:18:59p, "George" george@least wrote in
:

Principle is well-known. Round peg in round hole splits. Square
edge,
breaks fiber to make passage.

Yah but, but, I thought the whole idea was to apply pressure on the
mortised board so the whole thing stayed together better. If you
deliberately whack the pin in so a piece of it actually breaks off, then
you basically got nothing but a pinned mortise, not a drawbored one.

No. The idea is to get the shoulders of the tenon to register against the
face of the mortised board and keep them there.

When you don't have clamps, or the clamps would be too large, as in house
framing, you draw bore.

You really need to learn some woodworking, and it will involve some
thinking.

If you drive a round peg into an undersized round hole it will split the
piece. Force is applied evenly around the peg, finds the weakest place -
along the grain - to gain room. With a traditional square or whittled
peg,
the force on the edges pushes fibers aside or even severs them to make
room
without splitting.