Replies

1. 
   lat_axe | Dec 13, 2020 10:40am | #1

   An interesting question, that.

   How about a scratch stock of some kind, run against a batten clamped over the side to be grooved? You'd probably have to make one, including the design of the scratch blade holder and fence.

   I can imagine a jig consisting of a batten with a 45 degree slope having embedded magnets to hold a saw blade aright, clamped across the workpiece, then cutting a 45 degree kerf on one then the other side of a knife-marked channel. A thin blade Japanese saw would make a cut smooth enough to not need refining, perhaps?

   I can't see any kind of chiselling being a good option unless you already have the steady hand and eye of a Chris Pye. :-)

   But perhaps someone makes a specialist plane with a pointy blade of the right profile. I could imagine a standard plough plane with such a blade but haven't come across one.

   Lataxe

1. 
   s_m_titmas | Dec 13, 2020 12:48pm | #4

   I tried using my Japanese pull saw set against a 45 degree guide block but the results were inconsistent because the cut is extremely shallow but long in length and there is zero room for error. I think we're onto something with the 45 degree plane blade that you mentioned.

2. 
   joeleonetti | Dec 17, 2020 12:47pm | #9

   I would try the second approach. I've seen folks use wooden jigs to either saw or chisel the female part for a sliding dovetail. I don't think it would be that diffcult if you try a few practice runs first just to get the hang of it.

2. 
   steambent | Dec 13, 2020 11:17am | #2

   You could experiment with attaching a router plane to an angled block. You may have to use a fence and possibly hand saw the center of the channel to free the grain depending on which direction you are cutting.

3. 
   elmaduro | Dec 13, 2020 11:54am | #3

   Maybe look into hand-cut japanese Kumiko techniques. Seems a dozuki and a 45-degree guide block might work.

1. 
   s_m_titmas | Dec 13, 2020 12:51pm | #5

   I agree, the Kumiko technique might be the way to go. I've seen plenty of pictures V groove planes that are used for Kumiko but nothing commercially available for purchase. I suppose getting a plane iron blank and grinding my profile and making a scratch block would be the way to go

4. 
   ray2357 | Dec 13, 2020 01:07pm | #6

   Matt Kenney published plans for making a marking gauge in FW about ten years ago. If you made just the bar and ran it along a guide block, that would make it run 90 degrees to the intended usage as a marker. And it would cut a v groove.

5. 
   MillstShop | Dec 13, 2020 01:55pm | #7

   Maybe cut the groove slightly under size and pare to fit?

6. 
   john_c2 | Dec 13, 2020 02:02pm | #8

   Use a shoulder or rabbett plane. Strike a line with a marking knife in the center of the groove. Tilt the shoulder plane to the right, and ride it through your knife line. Tilt the plane to the left. Alternate left and right till you hit your groove width. Takes less time than it took me to type this.