The Clarinet BBoard
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Author: Chris P
Date: 2010-01-29 12:01
It takes the same amount of time to cut a grooved or wavy tenon slot as it does to cut a smooth one as the cutter is either specially shaped or programmed to cut the slot accordingly. The tenon slots are usually cut automatically by machine (along with other shaping).
But with impact adhesives there's no need for a tenon to have grooves or waves as that decreases the contact area on the back of the tenon cork - it's only the peaks of the grooves or waves that are in contact with the underside of the cork. Much better to have a completely smooth slot or one that's slightly domed but still with a smooth surface.
In the days when they used to use shellac to glue tenon corks on with, they may have needed more surface area for the shellac to adhere to by having deep grooves in the tenon slots, but with modern impact adhesives it's best to have a smooth surface so maximum bond can be achieved.
If you remove a tenon cork from an R13 you'll find it as only stuck to the peaks of the waves and the troughs are untouched - only having dried glue in them. Likewise with grooved slots - the tenon cork has only stuck to the peaks which is the minimum surface area of the slot.
On instruments with deep grooves I remove them (by turning them down) so I can have a smooth surface to glue a tenon cork onto.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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clarnibass |
2010-01-29 05:51 |
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Gordon (NZ) |
2010-01-29 08:01 |
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skygardener |
2010-01-29 09:03 |
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clarnibass |
2010-01-29 10:32 |
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clarnibass |
2010-07-17 08:12 |
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Chris P |
2010-01-29 12:01 |
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Lelia Loban |
2010-01-29 14:04 |
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Gordon (NZ) |
2010-01-29 23:46 |
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skygardener |
2010-01-30 02:50 |
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Tony F |
2010-07-17 08:37 |
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BobD |
2010-07-17 12:34 |
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skygardener |
2010-07-17 12:55 |
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Chris P |
2010-07-17 12:59 |
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