Flugelhorn Mouthpiece Specs
Unlike trumpet shanks, there is no single standard for the taper of flugelhorn mouthpieces. To determine the shank required by your flugelhorn carefully measure the outside diameter (OD) of the shank on your current mouthpiece at the "set point", the spot the shank stops in the receiver (see pic on right). The following are guidelines only; carefully measure the set point OD on your current mouthpiece for best results.
Bach shank ~
Based around the Small Morse taper, the Bach-sized shank is 9.3mm OD at set point and .335" OD at exit point. It fits most Callet, Bach, B&S, Kanstul 725 & 1025 plus newer Kanstul 1525 along with Courtois, Besson Sovereign 947-2, FE Olds, Jupiter, Holton/LeBlanc (including Sandoval), B&S, Schilke, Taylor, and some other European brands. Most flugelhorns designed for a Bach taper will also accept a standard Yamaha shank; it will just stick out of the receiver approximately 8mm further. For suitable gap, look for engagement of at least 2cm. Jerome Callet Superchops mouthpieces with Bach-sized shank include a "B" at the end of the model name.
Yamaha shank ~
Yamaha flugelhorns use the Large Morse taper which is 9.6mm OD at the set point and .336" OD at exit point. This shank is the most common fit for Yamaha, Getzen, Phaeton, Adams, Stomvi, UMI Benge-King-Conn, Interbinen, Weril, Blessing, Lawler, Van Laar, Holton, and older Kanstul 1525 flugelhorns. Jerome Callet Superchops mouthpieces with Yamaha-sized shank include a "Y" at the end of the model name.
French shank ~
A non-tapered French-sized shank with 10mm OD fits Couesnon and some other European brands including F. Besson 15BF Brevette, F. Besson 60 MF-Meha, plus Flip Oakes-Kanstul, and Kanstul CCF 925. Jerome Callet Superchops mouthpieces with French-sized shank include a "C" at the end of the model name; these are available by special order only.
German shank ~
Rarest of the flugelhorn shanks, the German size starts at 10mm (.394") OD at the set point and tapers down from there. Flugelhorns with this taper are easily spotted because they accept a trumpet mouthpiece. Though sometimes used on European horns, especially Miraphones from Germany, it's rarely used on American flugs. Harrelson and Carol Brass often ship two pipes with their flugelhorns: a 10mm pipe with tapered German shank to use trumpet mouthpieces in a pinch plus a 9.6 large Morse tapered pipe for Yamaha receivers. Superchops mouthpiece with German shank is a special order only.