Brass Musical Instruments

How to reduce labor-intensive hand polishing while achieving a consistent, high-polish finish on brass trumpet frames and trombone horns. Bel Air Finishing utilized the Horizontal Drag Finisher — a custom-designed system capable of processing long, large parts in multiple automated steps — to transition from traditional hand finishing to a more efficient, repeatable process.

To reduce the labor-intensive hand polishing process, Bel Air implemented the Horizontal Drag Finisher, a custom-designed system specifically engineered to handle long, complex brass components such as trumpet frames and trombone horns. The multi-step process began with an initial media pass to remove heavy sanding and grinding marks, followed by a second pass to achieve a uniform, high-polish finish.

The automated drag finishing system ensured repeatable, consistent results while minimizing manual labor and maintaining precise control over surface quality. The load/unload design further streamlined throughput, allowing operators to process multiple parts efficiently without sacrificing finish quality.

If you are unsure what equipment and media you require to achieve your desired surface finish, then send us your part, and we will evaluate it and provide you with a metrology report.