Replies to This Discussion

Permalink Reply by Moritz Voegeli on January 7, 2017 at 12:46am

Setup for doing exact low angle scarf joints with a handsaw: check

 

https://www.dictum.com/en/tools/woodworking-metalworking/saws/scrol...

 

http://z-saw.co.jp/en/Sawguide.html

 

a japanese carpenters tool to cut dimensional lumber at various angles, to get the idea.

 

For horizontal cuts square guides will allow an even better guidance of the saw. When you begin to saw, for a kerfed saw their teeth must run outside of the guides, once they dissapeared into the wood, you lower the guides for even better accuracy.

 

DIY!

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Permalink Reply by Stoney King on January 7, 2017 at 3:16am

http://www.cigarboxnation.com/profiles/blogs/cutting-a-scarf-joint-...

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Permalink Reply by john mackay on January 7, 2017 at 7:02am

not working

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Permalink Reply by Rick Alexander on January 7, 2017 at 9:55am

In that video, Glenn Watt shows how he does it. He measures 3 inches twice, then draws a line corner to corner. It's how I do mine. Try to find the video on youtube if you can.

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Permalink Reply by Taffy Evans on January 7, 2017 at 2:56pm

Hi, just for the record. I have a couple of Martin guitars in the shop for repair that have 15deg peghead angle.

Taff

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Permalink Reply by Hal Robertson on January 7, 2017 at 3:09pm

Well, Wikipedia and I have both been know to be wrong... from time to time...:-)

Out of curiousity, just measured a knockoff Hummingbird (12ish) and an Ovation Al Dimeola Signature (12-13ish). Granted, my measuring device was eyballing a rafter square, but it was in the ballpark.

Anyone interested in seeing how to cut a 17-18 degree scarf joint on a Harbor Freight $12 miter box?

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Permalink Reply by Ron "Oily" Sprague on January 7, 2017 at 3:50pm

Yeah! We want a scarf vid, Hal!

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Permalink Reply by Hal Robertson on January 7, 2017 at 4:11pm

Sorry, no video, but I do have pix.

Here's how to cut a farily steep (17 degrees or so) scarf joint using nothing more than a simple Harbor Freight $12 miter saw.

Place the stock in the miter jig with the corner directly in the 45 degree saw slot furtest away from you (see pic). Pull the other end toward you till it hits the jig wall. Hold firmly and saw away.

Assuming your stock is more than long enough, flip it around and repeat on the other end.

Flush saw one end to your chosen headstock length (this one is around 5 1/2") and, voila! One scarf joint.

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Permalink Reply by Hal Robertson on January 7, 2017 at 4:12pm

Attachments:

• 20170107_150354.jpg, 115 KB

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Permalink Reply by darryl kernaghan on January 7, 2017 at 4:45pm

A very useful tool for this is a simple sliding bevel gauge or bevel square, just mark your angle on the edge of the bench top with a length of wood placed at the angle you chose to the joint to be, then set your bevel to that angle,and that's your  back cut angle. you can get cheap bevel squares for a couple of dollars at the big box hardwares, even the ones with a plastic body are up to this task 

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Permalink Reply by Hal Robertson on January 7, 2017 at 5:02pm

Thos is how I usually cut them...

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• 20160911_172605-1024x768.jpg, 197 KB

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Permalink Reply by Wichita Sam on January 7, 2017 at 5:44pm

rule of thumb.  The higher degree of angle in the scarf joint, the more down pressure on the nut.  The lower degree of angle in the scarf joint, the stronger the joint.

That's why more Gibsons break at the headstock than Martins.  Anything between 9* and 15* is workable.  I prefer 10-11*.

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