drawbore pin design

[Ken S]

Does anyone have either the Lie-Nielsen or lee Valley drawbore pins?  My question is are they tapered concentrically or eccentrically?

Thanks,

Ken

[Ken S]

I guess no one here uses drawbore pins.  Drawbore pins are used in mortise and tenon construction.  Holes are drilled for wooden pegs through the mortise board.  The tenon board is drilled with the hole intentionally set a little tight (generally a sixteenth or a bit more).  The tenon is inserted and a tapered steel rod is pushed through to force the holes to line up.  This pulls the joint together very tightly.  No glue is actually necessary for assembly, although these joints are often still glued.  The joint is very strong, and will not fail when the glue does.

Ken