Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Results 1 to 2 of 2

Thread: Comb joint router jig

  1. #1
    Supporting Member Philip Davies's Avatar
    Join Date
    Dec 2015
    Location
    Reading, Berks, UK
    Posts
    691
    Thanks
    911
    Thanked 895 Times in 296 Posts

    Philip Davies's Tools

    Comb joint router jig

    Comb joint router jig-957e68bd-f9db-4a36-a411-cea9714ee84f.jpeg
    I have cut a lot of combs this afternoon, using this jig, which straddles a Triton router table.
    I did not enjoy it much.
    Comb joint router jig-f3178c6f-2457-42ca-ae49-38f0d7bd7b1d.jpeg
    This is a view of the jig. It is made from wood salvaged from broken furniture. It is in two parts. The saddle slides on the table. It has a hole for a vacuum , but this is useless. So is the spigot beneath, nearest the cutter. The front part slides within the saddle and is used to sandwich the material between the two false fences. There is a piece of 6 mm acrylic across the top
    Comb joint router jig-1b99a2c2-68c6-4078-b6af-5a77bf2e9b99.jpeg

    Comb joint router jig-74382b00-616b-47b9-83c0-1e80460421d4.jpeg
    Comb joint router jig-aa5cb03c-eb31-46c8-ba73-e6f945257228.jpegClick image for larger version. 

Name:	F3178C6F-2457-42CA-AE49-38F0D7BD7B1D.jpeg 
Views:	48 
Size:	1.13 MB 
ID:	43589

    In the first, third and fifth pictures above you can just make out the notch, which is just slightly narrower than the cutter and is offset by the same amount from the cutter. The notch is screwed to the front fence and slides into a hole in the back fence opposite. You can see all the chippings, from just one pass, which the extractor does not remove.
    It will be seen, fourth picture, that the workpiece has to be clamped between the fences. If not, the cutter will kick it askew.
    So after each tine, or finger, is cut, the clamp is unscrewed and the workpiece moved up over the notch. But since the debris has already accumulated, it has to be removed, so the front fence is slid towards me and the dust has to be brushed away. Clamp again, switch on again, cut the next tooth.
    Very tedious.

    Why bother with the front fence? Why not just hold the material with my fingers? Like you see in lots of videos.


    Whatever the deficiencies of this jig (there are others), at least the cutter is FULLY GUARDED -, per Woodworking Machinery Regulations 1974.
    I wince every time I see a film of an operative passing their hands near, or even, over an unguarded circular saw blade. When magazines publish pictures of machine operations without guards, they warn readers “Guards removed for clarity!”
    Any accident in a commercial workplace, where many videos are made, would result in prosecution under Health and Safety laws.
    You can troll me if you like for being priggish, or hypocritical, or over sensitive, but I am aware as I grow older that my concentration is deteriorating. Mistakes are a frequent occurrence. If you routinely have guards in place, would they protect you if you tripped when you moved round the machine?

    I made the jig not because I wanted to make boxes, but to make battlements for a toy fort! But I thought that I might as well make an accurate comb jointer. I still have in the attic the toy fort my father made me for Christmas 65 years ago. He cut all the crenellations by hand with a fretsaw, mitred the edges of hardboard walls using a rasp: walls, keep, gatehouse, towers, ramp and drawbridge, all made on a little wooden stepladder, with just 2” fret clamps and less than 10 tools.

    2000 Tool Plans
    Last edited by Philip Davies; Aug 30, 2022 at 12:24 PM. Reason: Correct typos. Supplement info.

  2. The Following User Says Thank You to Philip Davies For This Useful Post:

    Jon (Sep 2, 2022)

  3. #2
    Content Editor
    Supporting Member
    Altair's Avatar
    Join Date
    Aug 2013
    Posts
    8,627
    Thanks
    1,127
    Thanked 21,451 Times in 6,925 Posts


    Thanks Philip Davies! We've added your Comb Joint Router Jig to our Jigs category,
    as well as to your builder page: Philip Davies's Homemade Tools. Your receipt:




    186 More Best Homemade Tools eBook

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •