Screwbell players!... Help!...

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greenbean
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Location: San Francisco

Screwbell players!... Help!...

Post by greenbean »

Can you folks who own a screwbell trombone please take some measurement for me? This information would be greatly appreciated!...

--Make/model
--Bell diameter
--Thickness of flare section
--Diameter of bell section threaded receiver
--Length of bell section
Tom in San Francisco
Currently playing...
Bach Corp 16M
Many French horns
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elmsandr
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Location: S.E. Michigan
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Re: Screwbell players!... Help!...

Post by elmsandr »

Bass player here with a Frankenbone with a Holton Flare...

Just under 10" diameter flare
Hair over 3.5" tall
Bit under 3.5" diameter at joint
Length of remaining bell section is ~23.25" with attachment tuning slides all the way in.

(FWIW, this fits in the Shires/Marco M hardcase)

Cheers,
Andy
bassbone721
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Location: Bay Area CA

Re: Screwbell players!... Help!...

Post by bassbone721 »

Pretty rough estimates because I wasn't smart enough to get a ruler for school.
Edwards bass bell (conversion done by Dan Oberloh 2 owners ago)
Bell Diameter: 9.5 in
Thickness (Height, I assume) of the flare section: ~ 4 in
Diameter of the ring: ~ 3.5 in
Length of bell section: ~ 22.5 in
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jacobgarchik
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Re: Screwbell players!... Help!...

Post by jacobgarchik »

Bach 42b
--Bell diameter 8.5
--Thickness of flare section 2.75
--Diameter of bell section threaded receiver 3
--Length of bell section 23.5

Bach 36
--Bell diameter 8
--Thickness of flare section 3
--Diameter of bell section threaded receiver 3
--Length of bell section 24

both done by Josh Landress using a French Horn ring (Alexander I think? I can't remember)

Part of the issue is these rings are made in bulk by horn manufacturers. They are a set size. To put them on a trombone you will have to fish for the best match between throat diameter and the ring. Different size trombones = different placement = more or less thickness. Not sure if Shires or Thein is making a ring just for trombones or if they use a French Horn ring.
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elmsandr
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Re: Screwbell players!... Help!...

Post by elmsandr »

jacobgarchik wrote: Mon Oct 12, 2020 8:51 am ...
Part of the issue is these rings are made in bulk by horn manufacturers. They are a set size. To put them on a trombone you will have to fish for the best match between throat diameter and the ring. Different size trombones = different placement = more or less thickness. Not sure if Shires or Thein is making a ring just for trombones or if they use a French Horn ring.
I believe Instrument Innovations is now making some, IIRC. Not on their website, but I believe they are making some in various diameters. For a while, they were mailing things with a set of calipers to make some measurements to make them custom for the flare.

Cheers,
Andy
Crazy4Tbone86
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Re: Screwbell players!... Help!...

Post by Crazy4Tbone86 »

elmsandr,

If you are looking to fit your horn with screwbell rings, you need to contact Mike Olsen at instrumentinnovation.com. He has a very precise method of measuring bells with plastic rings and calipers and custom makes each ring set to order. There really is no “one size fits these models” system. You should do it the right way and have rings made specifically for your trombone.
Brian D. Hinkley - Player, Teacher, Technician and Trombone Enthusiast
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greenbean
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Re: Screwbell players!... Help!...

Post by greenbean »

Thanks for post measurements, guys! I appreciate it.

Anyone else?...
Tom in San Francisco
Currently playing...
Bach Corp 16M
Many French horns
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Burgerbob
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Location: LA
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Re: Screwbell players!... Help!...

Post by Burgerbob »

I have a bell and case... but they aren't with me! I'll see what I can do.
Aidan Ritchie, LA area player and teacher
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bkessler
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Location: Ann Arbor area, MI

Re: Screwbell players!... Help!...

Post by bkessler »

Lawler Model 2
--Bell diameter (s) - 7.5, 7.75, 8
--Thickness of flare section - 2.75
--Diameter of bell section threaded receiver - just under 3
--Length of bell section - 24 with tuning slide all the way in
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greenbean
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Location: San Francisco

Re: Screwbell players!... Help!...

Post by greenbean »

I appreciate all these responses, guys! This is very helpful.
Tom in San Francisco
Currently playing...
Bach Corp 16M
Many French horns
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