Replies

1. 
   furnituremaker | Oct 22, 2007 04:59pm | #1

   Hi Jack,

   I assume you need clean results becuase your mortises are exposed?

   When my hollow chisel mortiser is tuned up, sharp, and working properly I can achieve good clean results - but often-times a variety of things can come together to produce less than optimum results.  For perfectly clean results you are on the right track and your idea will work if your registration is right on.   If I want guranteed  results I do a couple of varitions of what you suggest.

   Option 1.

   Using a router (in my case the multi-router)  route out the mortise to full length.
   Making sure the hollow chisel is very sharp- set up the mortiser with just the hollow chisel (no bit).  The mostiser is then used, without the motor running,  to plunge and square the round ends up.

    

   Option2.

   Route the mortise to full length then use the hollow chisel ( again very sharp is a must) as a hand held tool to square the corners up. This option will damage the shank and render the hollow chisel unusable  for use in the mortiser. We have a set of hollow chisels in my shop that are marked and kept separate for this work.   

   Please let me know if this is was of help (and makes sense).

   good luck,

   Darrell

1. 
   jockooo | Oct 22, 2007 06:31pm | #2

   Darrell, thanks.
   Yes, it's the face side of the mortise on through tenons that I want to be crisp
   Both suggestions certainly make sense but since I'm not quite ready to sacrifice
   a chisel I'm going to play with #1.
   Regards,
   Jack