How to do a bridge conversion from 6 to 12 holes 

Hello Pablo from Alabama USA. Thank you so much for the 12 hole conversion trick. I had a guitar that really needed converting due to a bad neck angle. I found a 12 inch long 1/16 inch drill bit and got it in one day. I made the jig as you suggested. I had the job completed with great success in less than 30 minutes. Wonderful idea. Thank you so much. Ernest Pattillo

In the United States, these long drill bits are known as aircraft drill bits. Thank you for sharing this technique!

Very well done, Pablo. This kind of improvement is quite frequent when guitars loses its optimum neck angle, resulting in a too low saddle to keep string action playable. I used to make string beads to solve this problem successfully, just because I didn’t find this extra long aircraft drill bit. But twelve hole bridge is the way to go to get the job done elegantly. Thanks for sharing.

Excellent video. Thank you for sharing.

Thank you for showing how to do this, that's very useful!

You are a master Pablo, thank you very much!

Thank you Pablo for demonstrating this useful modification from 6 to 12 hole bridge so clearly. The use of your jig and your explanations are brilliant. Cheers!

I always make 12 holes bridges as you taught me before Maestro and that works perfectly good. This video is excellent as all your previous ones to manage the conversion from 6 to 12 holes. The jig is a simple but a great one. Thank you for sharing Pablo.

Good explanation teacher.

Excellent video once again. I must try again to get this drill bit. I made my drill bit because I couldn't find one online. I would have felt it necessary to fix the error in string alignment, or speak to the client. This is a common problem.

Thank you, Pablo!

Though my bridge is not attached to the guitar now still this video is very very helpful for the job Thanks a Lot!

Bravo!

I'm glad you had the idea of finding a very long drill bit, as I was considering trying to remove a bridge in order to do these modifications. I've yet to do it, but I did find on Amazon a 1/16 x 12 inch bit, which as metric is 1.58 x 304 mm. That length would allow for more than enough for any conceivable classical guitar. Pack of 2 ("one to use, one to lose", or in this case one to break or bend) for about USD $10. I might consider an 18 hole modification (3 holes per string as illustrated by Beau Hannam's excellent videeo here on YT - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--oDlPbqQ2-Q.html), though I fear that might weaken the bridge a bit too much...

Hi, I would liked saw how you attach the strings, but thanks a lot for the tips.

maestro. im making my first guitar. i glued my bridge slightly away from the center. the strings are a bit away from the first string side. the distance between the 1st string and the downside edge is 8mm on the 12th fret, while the distance is 5mm between the 6th string and the upperside edge. but i dont want to take off the bridge and re glue it. so is it okay to put new holes in this position?

Do you have any tips on reducing the height of the saddle slot and possibly recarving the bridge profile in situ? Thanks for the video....so helpful!

Is it a concern to use carbon trebles such as Savarez Cantiga 510 AJ on a 12 hole bridge? Will they slip out and damage the top or the bridge??

Nicely done, but I don't understand how drilling a second hole parallel to the original hole actually changes the break angle. What am I missing? Are the new holes drilled slightly lower?

Hola. ¿Donde se compra esa broca? Gracias de antemano

Maybe you should not drill the holes at the same level, because you are redoubling the number of holes in the same line and weakening the structure of the wood by the perforation.