The Boston Gear CMBA140TR-3 Brake is a double C‑face AC brake designed to bolt directly to a motor shaft via a splined hub and standard NEMA mounting, part of Boston Gear's CMBA series. It is a direct-acting, spring-set brake that is electromagnetically released, providing instantaneous release when energized and immediate engagement to hold the shaft on power loss; the unit includes a manual release knob. The TR suffix denotes a through-brake-to-motor configuration used in CMBA TR variants, and the family supports horizontal and vertical mounting, continuous duty operation, a splined hub, and standard mounting patterns for quick installation.
