Rexnord NS815-21T Conveyor Sprocket NS815-21T

Rexnord NS815-21T is a 21-tooth molded-split nylon sprocket from the 815 Series, designed for Rexnord TableTop (flat-top) conveyors and built to engage 21-tooth drive chains with precise alignment. This variant features a shaft-ready bore of 1-7/16 inch with a dual-bore capability (1KW for a keyed bore and 1SS for a setscrew mount) in a molded nylon PA material finished gray (PA_GR), suitable for light- to medium-duty service. The sprocket has a pitch diameter of 129.3 mm (5.09 inches) and an outside diameter of 129.5 mm, providing secure tooth engagement and predictable wear characteristics across Rexnord’s table-top chain profile. Its split-molded construction reduces installation time and allows removal without dismantling the chain, making it a practical choice for automated packaging and general material-handling lines that require easy serviceability and corrosion resistance. Compatible with Rexnord’s flat-top chain geometry and existing NS815 catalogs, NS815-21T helps maintain drive efficiency and minimize downtime in typical conveyor installations.