Screw Rims for Trumpet and French Horn

We can do a screw rim modifications of your own trumpet or cornet mouthpiece.

Custom rims are $155, including scanning, programming, and plating. We can also convert your mouthpiece to accept a screw rim for $35. Stainless steel rims are also available. Call Dr Dave to discuss the details of your order.

Screw rim modifications are done as follows:

1. The mouthpiece is placed in the CNC machine and the cup is measured with a digital probe.
2. The original rim and upper 0.1" of the cup are removed.
3. 766-36 threads, found on Bach screw rims, are added to the remaining under-part.
4. A new Wedge screw rim is programmed and milled based on the measurements of the original cup. The rim is designed so as to retain the cup depth of the original mouthpiece.
5. The original mouthpiece under-part and new rim are then placed in a lathe together, and the two are adjusted by hand in order to achieve a perfect, almost invisible blend.
6. Both the underpart and new rim are then plated.

 

 French Horn

French horn screw rims are available using 750 - 36 (Moosewood, Giardinelli, Osmun, Warburton) and 800-36 (Paxman and Halstead-Chidell) threads. 

Stock Rims

Stock rims are $95 for silver and $118 for gold and $115 forstainless steel. These rims are made as needed. Call or email to discuss your order.

Stock PHC sizes with 800-36 threads include US1, US2, N, S, S18, AN, AS-18. Other stock rims with 750-36 threads currently include Bach 7, Stork 0 4.75, Laskey 80G, and Moosewood 5.

Custom Rims

Custom French horn screw rims are available in either PHC 800-36 or Giardinelli / Moosewood compatible 750-36  threads. Custom rims are $155 for silver and $178 for gold and $175 for stainless steel. This price includes programming, machining, and plating a new rim to your specifications.

The best results are obtained if you send your complete mouthpiece, or at least the rim, to be scanned. However, if you choose not to send your mouthpiece we can make a custom rim if you provide the following information:

1. ID of your cup where it joins the rim.

2. ID of the rim as specified by the manufacturer. This is usually .03 to .04 inches below the crest height of the rim.

3. OD of the rim.

4. Exact length of the mouthpiece measured with a digital caliper with and without the rim attached.

5. The bite radius of the rim is also helpful.

If your current mouthpiece does not have threads we can convert it to accept a screw rim with either thread type for $35. Call Dr Dave to discuss the details of your order.