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*.
john mackay > Wichita SamJanuary 8, 2017 at 2:43pm
thanks.I'm only interested in 1,2 or 3 strings any more you can buy.but thats just me.
its highly unlikely a 3 string will break it neck maybe mine but not the wood!
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*.
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
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.
Hi, just for the record. I have a couple of Martin guitars in the shop for repair that have 15deg peghead angle.
Taff
Hal Robertson > Taffy EvansJanuary 7, 2017 at 9:09pm
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?
Replies
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*.
thanks.I'm only interested in 1,2 or 3 strings any more you can buy.but thats just me.
its highly unlikely a 3 string will break it neck maybe mine but not the wood!
found the details I needed see pics above.
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*.
20160911_172605-1024x768.jpg
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
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.
20170107_142319.jpg
20170107_143008.jpg
20170107_143146.jpg
20170107_150354.jpg
Taff
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?