31 March 2011

The Roubo Base


No philosophising today, just a progress report.  The 8 M&T joints of the base were drawbored and glued up.  I used a 2mm offset for the drawbored holes.  In hindsight I would have gone for a greater offset for such a big joint.  (Chris Schwarz tells us to 1st practice as the offset varies according to the size!). The dowels were 3/8" in diameter, made by hand as follows: I placed the blank on a V-Block and planed it into a hexagon with my fore plane.  I then hammered the piece through a LN imperial dowel plate.  My friend Manuel alternates  between the metric & the imperial dowel plates as a kind of a half size.  After this experience, I would do the same-it's less aggressive on the dowel. 

Next my son will be turning four 5" long, 30mm diameter dowels which will be the method of attaching the top to the base.  I will glue the dowels into the top, but not into the base.  Instead I will drill a dowel through to hold it in place.  In this way the bench can be disassembled in case I need to move.   There is light showing at the end of the tunnel.