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Re: non-aligning splits

Author: Chris P
Date: 2014-09-13 03:00

Depending which section is the better fit to the tenon will determine the outcome - if the larger portion of the broken bell is still the correct size, then the smaller portion will have to be compressed to bring the radius down and clamped with a Jubilee clamp or similar (as described above) to keep it in place while being glued and carbon fibre banded around the socket and just below it.

If the larger section is now too tight on the tenon, then a tapered mandrel can be used to gently open this up until it fits and can be glued to the smaller broken section, then held in place with a Jubilee clamp while slots are cut for carbon fibre banding.

Any steps within the bore can be filed down and papered up smooth, likewise with the outside and any voids can be filled in with superglue and wood dust.

The CT bell I banded was held together with cable ties which did the trick, but a suitable sized Jubilee clamp and wedges (and something placed in between them and the bell itself to protect it from scratches) should do the trick.

Repairing something like this is always good practice and even better still if the repair is successful as you will then know what you're capable of doing when some things may appear beyond hope.

Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.

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