Adjustable Classical Guitar Tuner Drilling Jig

The tuning machine drilling jig is used to drill holes for tuning machine rollers in conjunction with the headpiece template which is part of the 4 piece template set also available from J.S. Bogdanovich Guitars. The jig is designed to drill holes for tuning machines rollers that are 35mm on center and require a diameter of 13/32". The jig comes with 2 shims to drill holes for tuners with base plate widths of 16 and 18mm. These will work for the Waverly bronze leaf, and stippled bronze tuning machines respectively, carried by Stewart Mac Donald and can be easily adapted for any size tuners by creating different size shims. When used in conjunction with the headpiece template the outline of the headpiece can be cut, the tuning machine holes drilled with the template still in place, and then immediately proceed to cut the slots for the strings without having to reattach and reposition the template. Just clamp the jig to the headpiece with template attached (as shown in the photo above), and set in a small vice to drill. The jig is designed to be used with a headpiece veneer stack of 4mm . Shims of any size can be easily made to replace the exiting shims or used in addition to the shims supplied to compensate for whatever veneer stack you may be using. The jig comes with 2mm and 3mm shims to be used with 16 and 18mm base plate width tuners respectively. The instruction includes a drawing of a headpiece layout for an 18mm wide base plate, and a headpiece veneer stack of 4mm. The hardened steel drill bushings are press fit and replaceable. The rest of the jig is handmade Made with quality hardwood beech.