Thomas (Rexnord) DG00065 10172084 is a Series 71 high-performance disc coupling hub, size 300, with a rough bore of 5.00 inches. This torsionally rigid, all-metal hub requires no lubrication and accommodates angular, parallel, and axial misalignment. Ideal for maintenance-free flexible disc coupling applications.

The Rexnord Thomas S71 spacer type disc coupling is a general purpose high-speed, high-torque coupling designed applications requiring spacer-type couplings such as ANSI, API and other similar process pumps. Series 71 couplings are most commonly used on motor, turbine and gear driven pumps, compressors and blowers and when specified can meet all API 610 or API 671 requirements. The Series 71 is characterized by a simple three-piece design with a unitized center member assembly and two piloted hubs, available as Black Oxide, Zinc, Cadmium or Manganese Phosphate coated. The hubs are piloted fit to the factory assembled center member to enable easy assembly of components for better dynamic balance characteristics. The center assembly 'drops out' for fast installation or removal without special tools. 4 & 6 bolt designs feature stainless steel disc packs with alternate materials available. The 4-bolt design is available in 2 sizes while the 6-Bolt design is available in 9 and 12 sizes respectively. The Thomas S71 spacer type disc coupling is engineered to accommodate maximum continuous torque loads up to 91,700 lb-in and shaft diameters up to 7.810 inches for the 750.