 Topic: Synthetic/Rubber Rings
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smileyrichariho
Newbie
Joined: March.20.06
Location: United States
Online Status: Offline
Posts: 8
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| Posted: December.07.07 at 6:03pm | IP Logged
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Have any of you tried installing synthetic/rubber rings on clarinet tenons instead of using cork?
If so, Do you know a source for the rings?
What depth do you need to make the cut into the tenon?
I heard about it being done I just want to know the details that I have missed from people that have done it or tried it. I know you can give replacement rings to the player in case they break.
- Ryan
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DaveWeiner
Technician
Joined: January.19.05
Location: USA
Online Status: Offline
Posts: 10
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| Posted: December.19.07 at 9:38am | IP Logged
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This was covered at a recent NAPBIRT workshop I attended.
No specs were given, even though techs asked. The O-rings were just whatever seemed an appropriate fit and were purchased at a hardware store to fit. The i.d. of the ring needs to be a little less that the o.d. of the tenon cork channel after the cork's been removed.
3 rings were installed, one each at the extreme ends of the tenon cork channel, and one in the middle of these two. The ring channels were made by turning a channel in with a modified curved scraper. The scraper was ground into a round end with a radius equal to just a bit bigger than the O-ring radius. With the joint in a lathe and turning on a live center the modified scraper is used against a tool rest to turn the channel. You have to turn the channel in just deep enough to allow the ring to be installed for a snug fit against the receiver on the other joint.
Again, no specs were given. It was all done pretty much by guess and by golly, but with measurements and fitting taken and done along the way. My guess is that one could develop a repeatable method based on this very loosey goosey method if one was doing a lot of such joints.
It was also pointed out that these O-rings fall off and get lost quite a bit and the player needs to keep a supply on hand of a few spares. The advantage is that installation is as simple as can be and easily accomplished by even the youngest of players, and deteriorating cork that must be replaced by a technician is a thing of the past.
IMO, if done properly this can easily be undone by removing the rings and recorking the tenon. I think ring placement should certainly be done with this in mind.
Practice on junk.
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