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I saw a few different answers in some posts...........but anyone know for SURE what shank the 51 D is....or does it come in multiple shank sizes. Would like to use it on an 842S Yamaha Euph

Thanks

Perfect, thanks! I found the correct size I wanted ! Its apparently a Bass Trombone mouthpiece (L. Shank) according to the sticker. Hmm....its a LOT longer than the shank on my 53HL Yamaha mpc that came with the horn. Does that make a difference at all? Either way I'm sure its the right size.....just designed around a different instrument.

Reynold Schilke believed that having slightly more length in the (conical) mouthpiece backbore and slightly less length in the (cylindrical) tuning slide was better for intonation on trombone, therefore the Schilke bass trombone stem mouthpieces have historically been a little longer than pretty much everything else. In my opinion this never really worked on euphonium and had mixed results on trombone. When I was playing a 51D, I had mine cut down and replated by Schilke for about $75 and it made a big positive difference. I've heard that the newer Schilke mouthpieces are standard "Bach" length but I haven't bought one recently to check.

Interesting fact. At least I know I'm not completely insane now. This makes me very eager to experiment with some new mouthpieces if I ever get the chance. All I've ever known is a 12C (hahahaa! Old school horn). And the 51D . I don't like the bulky feel and response of the 53HL that came with the horn, however I do produce a stronger lower ranger and a better tone in some partials with it. There are compromises... I need to find something I like all around.

My own experiments convinced me that a longer shank than the standard Bach-size is slightly less satisfactory for euphonium. Many years ago in a conversation with Brian Bowman, he related that he liked to shave down even a standard shank a bit. He said the response was better this way. I have found that to be true, but going to far either way may have odd effects on intonation, so I would be a little cautious about modifications. If you are comparing, be sure to include intonation in your tests (who knows... it may improve!)