Kohei Fujii Guitars

Kohei Fujii Guitars

Sunday, July 13, 2025

Binding install

     I completed binding install except beveled edges. My beveled edge design is the Ruskin style. My beveled edge requires tiny 2x2 mm border to fill the 45 degree edge. This 2x2mm border will be 45degree cut before a veneer for the beveled edge install. 2x2mm material is the African black wood. Binding material is also the African black wood. Between the African BW binding and the body has a black-white trim. I carefully completed binding and purfling install without creating major gaps. I have good satisfactions from my successfull binding and purfling works.
     Next step is the beveled edge cut and the veneer install. This guitar has the African blackwood body and binding. This combination created a very unique blacky guitar. 

Sunday, July 6, 2025

Purfling install and binding material making

     I completed the purfling install work. This guitar has maple, Brazilian RW, maple, and black dyed maple purfling. I have been using my custom purfling channel cut jig for the Dremel. It is a simple jig; however, it enables to cut the purfling channel quite accurately without delicate work. 
     I also completed binding material making. This guitar has African black wood binding with a  black and white inlay border. I always glue the black and white inlay before bending the binding. 
     Purfling and binding install proceses are a time consuming work. Curve fitting work is the most important process. Before glue the purfling and binding, a perfect fitting makes a high quality gluing without any gaps. As you see the top has one coat of shellac. This is a prevention coat from the fiber tear off, when I remove clumping tapes. 

Sunday, June 29, 2025

Binding channel cut and purfling making

     I completed the binding channel cut and the purfling making. Binding channel cut for the top is a relatively easy work. However, the back side is a quite challenging work due to the domed back shape. I introduced an elevate ultimate binding jig for this challenging task. Using the elevate ultimate binding jig, the result is amazingly good. Form a single cut, the binding channel is precisely square at all locations including the neck heal section. 
     Besides the binding channel cut, I cut binding material from an African black wood plate. I also bend the purfling material. I will use maple, Brazilian RW, maple, and black dyed maple configuration for my purfling. I laminated those materials for the original purfling by myself.

Closing box

I closed the box. Before closing the box, I applied couple of coats of shellac for both the top and the back. Also, I did final shaping work for the sound board bracing. After glued the top and the back, I precisely trimmed the beveled edges. This body showed very strong and long tap tone. The tap tone last more than one second. This is a very good indication for the good tonal quality of this guitar. Next step is a bonding and purfling install. This is a very detailed work.

Sunday, June 22, 2025

Carbon fiber rod install and the sound board final shape

     I completed carbon fiber rod install. Carbon fiber rods are for preventing the body deformation over long time. Also, the carbon fiber rods improves the side rigidness for crisp sounds. Laminated side, solid lining, and the carbon fiber rods reinforcement are the best recipe for the best sound board vibration. This rock solid side maximizes the sound board vibration with minimum enagy loss. This is the most advanced steel strings guitar configuration.
     I also completed the final shaping for the sound board. I have tried different bracing patters. Now, my bracing pattern is quite traditional shape. I think the X-bracing is the best bracing design for steel strings guitars. After complete the sound board shaping, I applied two coats of shellac for improving the moisture sensitivity. I have been using the shellac coating for inside of my guitars.

Sunday, June 15, 2025

Beveled armrest and solid lining

I installed the beveled linings for the armrest and the neck joint. I also installed the solid lining. Beveled linings is made from Spanish cedar. The solid lining is made from three layers laminated mahogany. Making the beveled lining is a bit tricky work. I always use a band saw for the 45-degree angled cut. Also, glueing work for the beveled lining is a tricky work. I created custom designed cauls for holding the beveled object. This device works pretty good for this tricky work. The sound board side lining install work is completed. Next week, I will install carbon fiber rods for improving the body rigidness. 

Sunday, June 8, 2025

Block making and side assembly

I made head and tail blocks using Honduras mahogany. Also, I completed side assembly. This MD model will have a bolt on neck joint. Also, the MD will have a Carbon fiber rod body reinforcement bracing system. So, the block making is a little bit complicated work. Head and tail blocks were required to add many holes for the neck joint and carbon fiber reenforcement rods. 

Before installing blocks, I precisely shaped blocks to match to the side shape. Now, the guitar side assembly is done. I will shape the side thickness to the designed number. Next step is the lining and the kerfing install.