Rifling on Conn 3?
- paysonmcc
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Rifling on Conn 3?
I was going through some mouthpieces for students to use and found a Conn 3 in the pile. I checked to see if it was clean enough to play and found something really cool in the throat of the mouthpiece: rifling! Has anyone seen this on any other mouthpieces?
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- ghmerrill
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Re: Rifling on Conn 3?
Brand Turbobore: https://www.mundstuecke.ch/en/
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Re: Rifling on Conn 3?
Glenn Zottola mouthpieces hade riffled backbore. Some of us tried them in the 60s.
Yes that´s right JohnL, not riffled. stepped.
Yes that´s right JohnL, not riffled. stepped.
Last edited by Olofson on Sat Apr 13, 2024 3:49 am, edited 2 times in total.
- harrisonreed
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Re: Rifling on Conn 3?
Best Brass also has mouthpieces like this.
- JohnL
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Re: Rifling on Conn 3?
That's a really tight twist.
https://patents.google.com/patent/US2798402A
Are those cut in a spiral? It looks more like they're simple circumferential grooves.
I thought Zottola used a stepped backbore. That's certainly what the patent says.
https://patents.google.com/patent/US2798402A
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Re: Rifling on Conn 3?
At one time, I had a lot of the Elkhart Conn mouthpieces. I don’t remember “rifling” marks like that in any of those. Perhaps someone made some aftermarket modifications with a reamer or a drill bit?
Brian D. Hinkley - Player, Teacher, Technician and Trombone Enthusiast
- BGuttman
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Re: Rifling on Conn 3?
I'm certain it was aftermarket. My Conn 3 has no rifling in the aperture (or anywhere else on the piece).
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Re: Rifling on Conn 3?
That really looks like a failed attempt at reaming out the throat. Maybe they used a cylindrical file?
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- JohnL
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Re: Rifling on Conn 3?
I'm thinking maybe a tap?Crazy4Tbone86 wrote: ↑Fri Apr 12, 2024 4:29 pm At one time, I had a lot of the Elkhart Conn mouthpieces. I don’t remember “rifling” marks like that in any of those. Perhaps someone made some aftermarket modifications with a reamer or a drill bit?
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Re: Rifling on Conn 3?
Off topic a bit, but a tap and die set can be useful.
I just helped assemble a handicapped ramp for a neighbor who'd had surgery. It's an assortment of pieces to be used temporarily so gets moved fairly often. The crew ran a tap down every threaded hole and a die across every threaded piece before assembling. That avoided a lot of frustration over munged up or just dirty threads.
I just helped assemble a handicapped ramp for a neighbor who'd had surgery. It's an assortment of pieces to be used temporarily so gets moved fairly often. The crew ran a tap down every threaded hole and a die across every threaded piece before assembling. That avoided a lot of frustration over munged up or just dirty threads.