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Re: repair/adjustment advice needed

Author: Chris P
Date: 2020-01-03 16:11

Please don't sand it down as that can leave the tenon ring with a dip or rounded off if overdone - I see that often and it's a shame they can end up like that and at worst they end up rocking as there's nothing solid to keep the joints fitting well together.

You can easily see the high spots as they'll be shiny where the tenon rings bind in the sockets when you've cleaned the grease off them. Just remove dust from the high spots and check the fit, then remove some more until the sockets fit well without binding nor rocking.

Ideally tenons should fit their respective sockets like the fit of a flute headjoint in its socket or tuning slides on a brass instrument even without the tenon cork fitted. Only this isn't an ideal world and wood wants to move about with humidity changes and you'll have to find the best compromise.

Chances are both the tenons and sockets are very slightly out of round as that's how quarter sawn timber naturally goes with humidity changes and there's not much you can do to prevent that happening. Plastic, ebonite, metal and Greenline instruments don't have this problem - even though Greenline is reconstituted grenadilla, it is in essence a composite made from wood dust and resin with no natural grain pattern.

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

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Author

Date

repair/adjustment advice needed new

m1964

2020-01-02 23:50