12 hole tie block repair (Full Version)

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Andrew -> 12 hole tie block repair (Mar. 6 2012 21:14:57)

Hi,

I'm repairing a 12 hole tie block were there was not enough wood between the string holes and over time the strings have distorted some of the holes leaving sharp edges which causes string breakage. I'm thinking of cutting out the wood where the bone strips normally are and putting back a piece of bone that i will redrill the string holes thru.

Can anybody see any problems with having the string holes running thru bone?

Thanks,



Anders Eliasson -> RE: 12 hole tie block repair (Mar. 6 2012 22:00:12)

Its difficult to see the problem without a photo. Theoretically, I cant see a problem with strings running through bone.
Maybe another solution would be shaving 1mm of the string block and laminating a 2mm piece of hardwood to that, thus having a string block which is 1mm higher. This should give you some more space for working.



Andrew -> RE: 12 hole tie block repair (Mar. 8 2012 10:08:24)

I've already cut away the outside part of the tieblock but the inside is still there so I've taken a photo so you can see what's happening. There is several problems here;

1) ebony strips used instead of bone
2) string hole pairs too close together
3) tie block could be a bit meater all round
4) this indian rosewood might be a bit soft

I've done some research and found that Smallman uses bone the full depth of the tie block to reduce string hole wear. A lot of his bridges are made of paduak, so it's probably not a bad idea. Here's a couple of shots of a Smallman bridge;

Wether I use bone or timber I've got to find a good way to drill the holes and get good alignment with original holes, any suggestions?







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