hello everyone! remember me. my garage/shop has been too cold to work in for a while, but I am back now.
I have started building scarfed joint necks, mostly because i wanted to build an all Sapele bass. Well, all except the pickguard which will be Walnut. The pickguard will be inlaid, flush with the top. Why make a flush pickguard? you might ask. several reasons:
- It is a way to incorporate contrasting woods, or just give an accent.
- It allows me to have active pups and wiring without a separate hole for a battery.
- It gives access to the controls/wiring for repairs.
- It makes my instruments unique, thus more valuable.
- I just like them
anyway, I digress... this post is part 1 of how this mediocre builder makes scarfed joint necks.
my necks will be 40mm or some 38mm at the nut and 60mm at the heel. 3/4 thick with a 4" wide x 1/2" thick headstock. C shape body.
Part 1 is about how to make the scarf joint.
First, I need a couple fixtures or jigs... I will make everything from 6/4 lumber (1-1/2" thick). In this example I used a piece of sapele 7" wide by 48" long.
first jig... I need to assure that My pieces are all uniform sizes. Rather than trusting my cheap table saw fence to be consistent, and my eye to be true, I made a fence that uses the guide slot in the saw table to assure that it is always the same. the plywood fastened to the side fits down into the slot, holding the jig in place.
View attachment 4655473View attachment 4655474 After ripping the board 4 times i have 4 pieces of wood 7/8" x 1-1/2" x 48" and about 1/2" thick piece left over.
Now i need to cut a 15degree angle.... not an easy thing to do consistently with any normal shop tools.
Jig number 2... a way to cut 15Degree angles...
Many builders use a band saw for this, others use a miter saw.
I chose to use my table saw. Here is how I do it.
First i hand cut a piece of wood at a 15 degree angle. Then I attached a piece of 5/8" plywood to it to follow the table slot. I then hold a piece of wood against it(or attach it with double stick tape), and slide the entire assembly through the saw, jig and all. see below.
View attachment 4655471 View attachment 4655472 View attachment 4655477
To get the fit flip the part that will become the headstock over as shown above. But this is just to check our accuracy. We don't make the actual joint until a little later.
Note that the 1-1/2" dimension is vertical for this cut, and the 7/8" dimension is horizontal.
After cutting the pieces to my predetermined sizes. (2 pieces are glued side to side to make a neck blank, and 3 to make a headstock.) you can see that my one board yielded the material to make:
- 2 full size necks. (top)
- 1 short scale neck (bottom)
- 2 headstocks (above short scale neck pieces)
- 2 pieces toward a third headstock ( middle, arranged to show how the joint is made.)
View attachment 4655476