Replies

1. 
   trialnut | Jun 30, 2011 09:31am | #1

   Get out the mics

   I would drill a hole with just the auger, no chisle, and then measure the hole to see if it is exactly the same diameter as the auger. If it is larger then the auger is not sharpened equally on each side and will drill oversize, thus leaving the marks.

2. 
   gpssam | Jun 30, 2011 01:22pm | #2

   Hone Them Down

   Mine did that also. I just put the chisel and bit in the machine started it up and held the edge of an old sharpening stone against the side of the chisel. Any part of the rotating bit that was proud of the side of the chisel was quickly removed. I actually pressed hard enough to deflect the chisel a little bit just to make sure that that auger was smaller than the chisel.

1. 
   skeezaroonie | Sep 13, 2011 03:47pm | #10

   Awesome sugggestion, solved my problem

   Thanks gpssam.  I found myself needing to chop some 5/8" square holes, not oblong mortises, in some pecan and mesquite.  These will not be covered with a shoulder or escutcheon.  I found and ordered the 5/8" chisel & bit and I was most discouraged on trying it by the scallop left by the auger bit.   Thanks to your suggestion and my internet ferret (aka significant other, who can find what year the first refrigerator was sold to Eskimos, not to mention brand) I gave my bit your sharpening stone treatment.  Figured what the hey, it's worthless to me anyway unless I can drill truly square holes and voila!, now I can.  Made my day but, hey, I'm pretty easy.  Thanks again.

3. 
   RalphBarker | Jun 30, 2011 06:56pm | #3

   chuck check?

   Before doing any grinding, you might also want to check your chuck. If the auger isn't centering properly, you might be getting some run-out/wobble that would explain the auger grooves. Check the chisel alignment, as well.

4. 
   stantheman | Jul 13, 2011 08:54pm | #4

   thanks for bringing this up

   Steve25

   Thanks for bringing this up.  I thought it was just my problem. 

5. 
   Routerman | Jul 17, 2011 11:09pm | #5

   Not something you asked for, just a picture.

   Have not seen a perfect mortice hand or machine-chisel cut mortice, tho Ian Kirby is damn good. Have had success routing. Sample is typical. http://patwarner.com/images/508_a.jpg

1. 
   Willie | Jul 24, 2011 07:07pm | #6

   Very nice cut.

   Would you mind posting up how you do that, home made jig, how you hold the stock?

1. 
   Routerman | Jul 25, 2011 11:02pm | #8

   Rough description here:

   http://patwarner.com/router_morticing.html

2. 
   Willie | Jul 24, 2011 07:10pm | #7

   Very nice cut.

   Would you mind explaining how you do that with your router, what kind of jig, how you clamp the stock?

6. 
   Willie | Jul 31, 2011 08:11am | #9

   Hollow chisel mortises are never smooth as with routered mortises. The problem with smoothing using a chisel afterwards is you loose the time you are supposed to save, as hand finishing the mortice would mean also tuning each tenon to fit.

   I don't bother about the chisel lines, I just make my fit a little tighter than compared to a router mortise, the lines allow glue dispertion.