There's the brute force method, where you just hammer them in and pray you don't whack the finish in the process. I'd attach the bridge and mark the six holes. bit. Joined: Oct 19, 2003 Location: Albuquerque, USA. Finally, there's the drill press method, which is what we'll illustrate here. This isn't the thread you're looking for but here's the way I drill the holes for the StewMac flush ferrules I mentioned above. Then, some like to use a soldering iron, heating the ferrule up and pressing it into the hole. Given the possibility of damage caused by the use of inferior drill bits and the fact that you have no lips on your string ferrules the purchase of a quality brad point bit is a small price to pay. Drill 1/8" (3.00mm) diameter string holes through the guitar body for all ferrules. * Drilling String Through Holes * Aug 14, 2011 #13. I mount and drill directly through the bridge using the largest diameter drill that will fit through the bridge string holes. If I were drilling string through holes without a drill press I'd get one of these guides. Posts: 18,425. There are generally 3 ways DIY builders put in string ferrules. About This Item. Then I drill for the ferrules using the drill press with a pin mounted into the drill press table (actually it's the drill bit used in the … For mounting the strings through the body of a non-tremolo solidbody guitar. I'd remove the bridge and drill the two outside holes all the way through using a 1/8 in. It should work much better than a piece of plywood with a hole it in. A new brad point bit used in a drill press will give you the precision you'd like. A better match on vintage guitars: the Relic Nickel plating has an aged look, perfect for repairing old guitars, when shiny hardware looks out of place. Jack Wells Doctor of Teleocity Ad Free Member.