scarf joint jig - Router Forums
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post #1 of 13 (permalink) Old 10-20-2012, 11:31 AM Thread Starter
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Default scarf joint jig

I am making the gunwales for a cedarstrip canoe. They are to be 3/4" by 7/8" by 16' long. I have 12' stock. I want to make a scarf joint 1:12 ratio. Does anyone have a jig or preferred method to cut these angles. Repeatability is a problem.

thanks bearclaw
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post #2 of 13 (permalink) Old 10-20-2012, 03:49 PM
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In a couple of weeks I'm going to start building my first "stripper" too, but mine will be a kayak. A lot of builders make a jig for the tablesaw, but I think that I'm going to build one to use a router instead. My idea is similar to the jigs for using a router to surface plane large slabs, but the main difference (other than size) will be that the stock will be held at an angle to the router base (for the 1:8 or 1:12 slope). I'll use a down-shear mortising bit to get a smooth surface for a stronger glue joint. Some builders scarf across the width of the strip, and others across the thickness. I prefer the appearance of scarfing across the thickness, so that's how I'll build my jig. I haven't worked anything out in detail yet, but when I do I'll post the Sketchup model here. My idea is similar to this one, but not as wide because I'll be scarfing thin strips not wide planks.
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post #3 of 13 (permalink) Old 10-21-2012, 05:42 AM
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There's a jig here that might be a help to you, even if it's not a router jig.

talkbassDOTcom/forum/f57/scarf-joint-jigs-501205/#post6742621

If you search around guitar-building forums you'll get a lot of ideas because the neck-to-head joint, where there is one, is usually a scarf joint and some guys have come up with clever ideas for making good ones.
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post #4 of 13 (permalink) Old 10-21-2012, 06:29 AM
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post #5 of 13 (permalink) Old 10-21-2012, 06:54 AM
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Howdy Lex,
Woodhaven makes a fixture for making scarf joints that works very well. Thak a look.

Woodhaven 3400 Scarfing Sled : Scarfing Sled
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post #6 of 13 (permalink) Old 10-21-2012, 11:27 AM
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Just do a search. Use something like 'how to make a scarf joint jig' for your search phrase. That turned up a ton of info, plans, and how tos.

"It ain't what you're told, it's what you know." - Granny Weatherwax
Gather the villagers, pitchforks, torches; we march at dusk!
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.
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post #7 of 13 (permalink) Old 10-21-2012, 09:11 PM
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Another example:
How It's Made Drum Shells - YouTube
at 1:14 is where the action starts.

  • Accident free since 10/27/12 at 3:58 pm.
  • Cursing free since 10/27/12 at 3:59 pm.
  • ...it happened in Everett, WA USA
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post #8 of 13 (permalink) Old 10-22-2012, 05:03 AM
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Barry, when I made my gunwales, I took a small section of 3/4 x 7/8 stock and drew a diagonal line 9" from one side to the other which is the 3/4" x 12 scarf. I brought this to my table saw and clamped it to the miter and cut it until I came to a cut parallel to my line. This meant modifying my miter with a jig since it wont go to this angle. Once I made the jig I just clamped my longer stock which had the other end supported on a table and cut my scarf. It worked fine.
Fred
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post #9 of 13 (permalink) Old 10-22-2012, 12:38 PM Thread Starter
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Thanks. The only problems with guitar jigs is that they are using short stock. I am trying to scarf a 5foot piece onto a 12 foot piece and their jigs are too short. Still I might be able to adapt something
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post #10 of 13 (permalink) Old 10-22-2012, 12:43 PM Thread Starter
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Thanks but I am cheap and only need to make 4 joints.
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