How to measure bore size

Tubas, euphoniums, mouthpieces, and anything music-related.
Forum rules
This section is for posts that are directly related to performance, performers, or equipment. Social issues are allowed, as long as they are directly related to those categories. If you see a post that you cannot respond to with respect and courtesy, we ask that you do not respond at all.
Post Reply
User avatar
bort2.0
Posts: 5258
Joined: Thu Aug 13, 2020 9:13 am
Location: Minneapolis
Has thanked: 336 times
Been thanked: 1001 times

How to measure bore size

Post by bort2.0 »

Aw jeez, I forgot...

I know it's the 2nd valve slide... But is it the inside or outside diameter? And of the slide itself, or the receiving tubes attached to the valve casing.

Obviously wasn't paying attention, but now that I have calipers it's all of a sudden relevant... :bugeyes: :laugh:
These users thanked the author bort2.0 for the post:
jtm (Sat Sep 24, 2022 8:30 pm)


User avatar
LeMark
Site Admin
Posts: 2840
Joined: Wed Aug 12, 2020 8:03 am
Location: Arlington TX
Has thanked: 77 times
Been thanked: 822 times

Re: How to measure bore size

Post by LeMark »

ID of the inner slide as far as I know
These users thanked the author LeMark for the post:
Yorkboy (Tue Sep 27, 2022 10:07 pm)
Yep, I'm Mark
User avatar
bort2.0
Posts: 5258
Joined: Thu Aug 13, 2020 9:13 am
Location: Minneapolis
Has thanked: 336 times
Been thanked: 1001 times

Re: How to measure bore size

Post by bort2.0 »

LeMark wrote: Sat Sep 24, 2022 8:55 pm ID of the inner slide as far as I know
Ah, the least convenient place, then... thanks!

I seem to recall hearing before that Rudy Meinl bores are measured as the outer diameter of the slide tubes... Which slightly inflated the bore size. Maybe I'm wrong, but seem to remember this now. Wish I'd have tested that out... :facepalm2:
York-aholic
Posts: 1440
Joined: Thu Aug 13, 2020 10:39 pm
Location: SoCal
Has thanked: 1570 times
Been thanked: 468 times

Re: How to measure bore size

Post by York-aholic »

Your Martin Eb has the same bore through all 3 valves. .625” if I recall.
Some old Yorks, Martins, and perhaps a King rotary valved CC
User avatar
bort2.0
Posts: 5258
Joined: Thu Aug 13, 2020 9:13 am
Location: Minneapolis
Has thanked: 336 times
Been thanked: 1001 times

Re: How to measure bore size

Post by bort2.0 »

York-aholic wrote: Sun Sep 25, 2022 2:23 pm Your Martin Eb has the same bore through all 3 valves. .625” if I recall.
Jeez that's small

Wonder what the 1895 Conn is?
York-aholic
Posts: 1440
Joined: Thu Aug 13, 2020 10:39 pm
Location: SoCal
Has thanked: 1570 times
Been thanked: 468 times

Re: How to measure bore size

Post by York-aholic »

I pulled out a top action set from a Martin medium. It is .625.

Yes, small, but it isn’t a big horn so the bore is pretty proportional.

You like how it plays, so who cares what the bore is?
:tuba:

However, I will say that bugle plays pretty dang good with a .689 King cluster on it, especially with a miraphone 183 rotor hanging off the back of the cluster.
:smilie7:
Some old Yorks, Martins, and perhaps a King rotary valved CC
User avatar
bloke
Mid South Music
Posts: 19412
Joined: Thu Aug 13, 2020 8:55 am
Location: western Tennessee - near Memphis
Has thanked: 3871 times
Been thanked: 4136 times

Re: How to measure bore size

Post by bloke »

I’m really bored, so my bore is extra extra large.
User avatar
Yorkboy
Posts: 851
Joined: Thu Aug 13, 2020 9:47 am
Has thanked: 255 times
Been thanked: 131 times

Re: How to measure bore size

Post by Yorkboy »

bort2.0 wrote: Sun Sep 25, 2022 3:43 pm
York-aholic wrote: Sun Sep 25, 2022 2:23 pm Your Martin Eb has the same bore through all 3 valves. .625” if I recall.
Jeez that's small

Wonder what the 1895 Conn is?
If it’s that pipsqueak little E flat, also .625
User avatar
bort2.0
Posts: 5258
Joined: Thu Aug 13, 2020 9:13 am
Location: Minneapolis
Has thanked: 336 times
Been thanked: 1001 times

Re: How to measure bore size

Post by bort2.0 »

Yorkboy wrote: Tue Sep 27, 2022 10:07 pm
bort2.0 wrote: Sun Sep 25, 2022 3:43 pm
York-aholic wrote: Sun Sep 25, 2022 2:23 pm Your Martin Eb has the same bore through all 3 valves. .625” if I recall.
Jeez that's small

Wonder what the 1895 Conn is?
If it’s that pipsqueak little E flat, also .625
Thanks... And yes, that's the one. It's playable, but rough shape. Part of me is curious how much can be done for, say $200, so it'll be at least stable enough (and not jagged) so I can take it to Tuba Christmas or something.

I think I paid $30 for it. So really, no big deal either way. The best thing about that tuba is the engraving, anyway!
User avatar
bloke
Mid South Music
Posts: 19412
Joined: Thu Aug 13, 2020 8:55 am
Location: western Tennessee - near Memphis
Has thanked: 3871 times
Been thanked: 4136 times

Re: How to measure bore size

Post by bloke »

I have seen Conn, Blessing, Buescher, and King ancient E-flat instruments with a 5/8 inch bore.
These users thanked the author bloke for the post:
Yorkboy (Wed Sep 28, 2022 2:03 pm)
donn
Posts: 1351
Joined: Mon Oct 26, 2020 2:31 pm
Location: Portugal
Has thanked: 6 times
Been thanked: 169 times

Re: How to measure bore size

Post by donn »

Of course bearing in mind that we're talking about instruments that in principle follow a conical size progression from the same mouthpiece bore, so any conceivable "bore size" is represented at some point in there. Not saying it's immaterial, but it isn't a measure of the tuba, only of the valves.
User avatar
iiipopes
Posts: 1060
Joined: Thu Aug 13, 2020 4:26 pm
Has thanked: 138 times
Been thanked: 189 times

Re: How to measure bore size

Post by iiipopes »

bloke wrote: Tue Sep 27, 2022 8:52 pm I’m really bored, so my bore is extra extra large.
Would that be your primary or secondary bore? :smilie3:
Jupiter JTU1110 - K&G 3F
"Real" Conn 36K - JK 4B Classic
User avatar
bloke
Mid South Music
Posts: 19412
Joined: Thu Aug 13, 2020 8:55 am
Location: western Tennessee - near Memphis
Has thanked: 3871 times
Been thanked: 4136 times

Re: How to measure bore size

Post by bloke »

iiipopes wrote: Wed Sep 28, 2022 8:46 am
bloke wrote: Tue Sep 27, 2022 8:52 pm I’m really bored, so my bore is extra extra large.
Would that be your primary or secondary bore? :smilie3:
Mowing (particularly when the mower has been out-of-service PLUS I've been slammed with repairs - with no time to either repair the mower nor use it) is probably my primary bore - PARTICULARLY when the mower (once finally repaired, and I finally have time to use it) must serve as a bush hog, and I must cut acres (of what have become two-feet-tall "meadows") back down to one-inch lawns...B-O-R-I-N-G...as well as dumping endless 12' x 6' x 2' trailer-loads of thatch into ravines and washes.
These users thanked the author bloke for the post:
iiipopes (Wed Sep 28, 2022 12:46 pm)
Post Reply