Rexnord DB00149 is a Thomas Disc coupling component, model 451.DBZB, with a 3.00 inch bore A and 4.75 inch bore B, overall length of 7.28 inches. This disc coupling part is designed for high-torque, all-metal flexible coupling applications requiring precise misalignment accommodation.

Rexnord Thomas DBZ disc couplings are legacy general purpose high-speed, high-torque couplings. Typical applications include mixers, compressors, agitators, blowers & fans, centrifugal pumps, and conveyors. DBZ couplings are available in three configurations to maximize application flexibility:

• DBZ: Both hubs are inverted inside the disc pack for minimal shaft-to-shaft spacing
• DBZ-A: One hub is extended to accommodate taper bores and larger shaft gaps
• DBZ-B: Both hubs are extended for maximum shaft-to-shaft spacing

DBZ couplings are available in 13 sizes ranging from size 50 through 451, and are designed to accommodate maximum continuous torque loads up to 43, 400 (lb-in) and shaft diameters up to 4.63 inches.