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1. 
   SgianDubh | Aug 23, 2002 05:37am | #1

   fleetian, have you ever heard one run? Or a square headed spindle moulder? The howl of crazed blood gorging banshees in your ear should put you off for one as all those corners on the block displace air. But seriously, the problem with them is that between each cutter mounted in the block to cut in an appropriate arc there follows a set back corner (of the block). The square corner of the block must, due to necessary geometry sit some way behind this cutting arc. Therefore, after the cutter has passed a line horizontal to the infeed table-- of the jointer, there follows a significant set back as the corner of the block reaches the same position. if you're unlucky this is the prime time for the timber to be snatched by the block, tilted vertical, and sucked into the guts of the machine. If you, as the operator, are unlucky to be hanging on to the timber just wrong, your fingers and hand can be sucked in too. Those, now obsolete and defunct, square blocks on old fashioned spindle moulders have a similarly fearful reputation. They have been replaced by circular 'safety' blocks for decades. Slainte, RJ. 

   RJFurniture