RobF -> RE: How to fix new tuners (Aug. 21 2020 15:11:16)
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Those are nice tuners, good quality. If you don’t have a sharp chisel or the means to do a proper clean-up job, then I would only fill any old holes that line up with the holes for the new tuners. The wood dowel used for filling should be glued in. I would just leave any old holes that aren’t close to the new tuner’s holes alone. They can always be filled later by someone who has the tools to cut the filler flush without scratching up the surrounding finish. You definitely need to drill new guide holes where needed. Choose a drill bit that is the same size as (or a little bit smaller than) the inner solid portion of the screws, not the width of the outer flanges. Measure the width of the wood between the tuner slot and tuners and mark the drill bit at a little bit less than that length. This is to avoid drilling right through into the tuner slot. Also measure how much the screws stick out from the new tuners for the same reason; you don’t want the screw end to punch through into the tuner slots, either. If the screw is too long then snip the end off it with wire cutters. It also helps to put a smidgen of soap or wax on the end of the screw thread to help lubricate it so it doesn’t bind. Don’t overtighten! As soon as the screw gives firm resistance, stop, there is no gain in continuing - the flanges will either strip the hole or the screw head will snap off. The screws provided with tuners are notoriously flimsy, I think most of them are made with pot metal, and the heads can snap off with surprising ease. Drinks and music are the traditional final step, hopefully the music is provided by you on your newly updated guitar! [sm=Smiley Guitar.gif]
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