Replies

1. 
   JohnWW | Jun 12, 2006 07:09pm | #1

   A core box bit is basically a straight bit with a half round end and that isn't the bit being shown in the photograph on page 155.  The bit in the photo is a convex bit.  Most convex bits having a bearing on them, but MLCS sells one without a bearing as a horizontal crown molding bit:

   http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/bt_mold2.html#crown_molding_anchor

   You don't really need a convex bit to use the panel hollowing jig, though it may create a slightly smoother surface than other bits.  The shape of the panel is determined by the sweep of the router as it is guided by the jig.  Any bit, even a straight one would create the same final shape.  So before you go out and drop $50.00 on a new bit, try out the jig with some bit you already have.  A wide bit will make the job go faster, but other than that, any bit will work.

   John White

   
   

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   Edited 6/13/2006 2:21 pm ET by JohnWW

1. 
   woodsplicer | Jun 13, 2006 06:22pm | #2

   Thank you for your reply. Will take your advice.

2. 
   GaryW | Jun 14, 2006 07:39am | #3

   I don't see a core box bit in the link you provided. It's a grooving bit like this one http://www.woodcraft.com/search/search.aspx?query=core+box+bit&refcode=06INGOOG&keyword=core_box_bit, and here's another http://www.amanatool.com/bits-fv/45900.html. Another type is a "ball end," like this http://www.amanatool.com/bits-fv/45960.html. Sailboat mast makers use this one to to groove the aft side of a mast, where the groove contains the sail's bolt rope (which runs up the luff - the leading or forward edge of the main sail).

   Gary W

   gwwoodworking.com

   Edited 6/14/2006 1:13 am by GaryW

1. 
   JohnWW | Jun 14, 2006 04:47pm | #4

   Gary,

   You are correct, there isn't a core box bit on the page I linked to, but there is a reason for that. 

   As I explained in my first posting, Sandor, or his editor, misidentified the bit being used in the photo of the jig.  The bit he is using is a big wide bit with just a shallow curve across it's face, a convex bit, or a horizontal crown molding bit as it is called by MLCS.  That bit is at the top of the page I linked to.

   John W.

   Edited 6/14/2006 9:48 am ET by JohnWW

1. 
   GaryW | Jun 14, 2006 06:23pm | #5

   John,

   Thanks for your reply. My earlier post to you and Woodsplicer was to describe core box bits, since that was his original question.

   Shoot, I'd think Taunton's fine editors, especially Sandor, would have caught that one. Gary W

   gwwoodworking.com