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Author Topic: Throat sizes  (Read 255 times)
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heinz gries

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« on: Aug 25, 2017, 11:20AM »

Hello,

Some manufacturers call their throat sizes in letters.
How is the diameter of an A, B, C, D, E, F, throat?
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T.Mittag custom alto
Helmut Voigt alto with modified 36 Bach slide and brassark copper leadpipe
Conn 34H alto in D
Courtois alto
Bach LT6,gold plated,with Hoelle copper tuningslide.
Getzen Super deluxe silver plated and copper rim bell
Getzen 3508
BGuttman
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« Reply #1 on: Aug 25, 2017, 12:21PM »

Many times these are the drill sizes used to make the throat.  An E drill is 0.250" (you can convert to metric yourself).

There are drill size charts for letter drills on line with metric equivalents.

Here is an example: http://www.csgnetwork.com/drillsizeconvert.html
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Bruce Guttman
Solo Trombone, Hollis Town Band
Merrimack Valley Philharmonic Orch. President 2017-2018
heinz gries

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« Reply #2 on: Aug 25, 2017, 12:26PM »

thanks Bruce
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T.Mittag custom alto
Helmut Voigt alto with modified 36 Bach slide and brassark copper leadpipe
Conn 34H alto in D
Courtois alto
Bach LT6,gold plated,with Hoelle copper tuningslide.
Getzen Super deluxe silver plated and copper rim bell
Getzen 3508
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