Lots of people seem to like the bridges I make for my builds, and I've often said they're quite simple to make. It's not really my design - it's similar to a banjo bridge and there are a few other builders on CBN who use similar bridges. I've been meaning to do a how-to for a while, so here we go:
I start off with a bit of scrap wood, most likely an offcut from the fretboard. For these two I am using walnut and maple, but any hardwood is fine. The little bone pieces are from a 80x10x3mm bridge blank which I cut into 4 pieces. I mark the bridge's full length, then mark where to drill to make the slope on the top and the 'arches' on the bottom. I work out the height the bridge needs to be first, then subtract the 3mm for the bone and mark it out on the wood.
I carefully drill out the holes with the piece clamped to a scrap of wood to prevent tear out.
Now the bridges are cut out and are beginning to take shape. Next the bone pieces are glued onto the tops of the bridges. I use superglue for this.
The bone is glued on and the tape is removed. Time for some sanding.
I clamp a piece of 60 grit sandpaper to my bench and sand the bridge at an angle to blend the bone and wood, and to make a 'sharp' peak along the top of the bone. This is also handy for flattening the bottom of the bridge. the curves are done with the rounded corner of a sanding block.
These are both finished now after being sanded to 180 grit.
A few coats of Danish oil and they're done! Measure the string spacing you want to use and carefully file some shallow grooves with a triangle needle file.
Of course there is plenty of opportunity for individual expression with this design. In the photo above I doubled up the thickness, so the blank was 1/2" thick, and used half a bone nut blank. I also went without the centre 'foot'.
I hope this has been of some use!
-Richey Kay
