Rexnord 91070125 NS8500-21T Thermoplastic Split Sprocket

Rexnord NS8500-21T 91070125 Thermoplastic Split Sprocket is a molded nylon (thermoplastic) sprocket in the 8500 Series designed for Rexnord MatTop and TableTop conveyors. It features 21 teeth with a pitch diameter of 5.1 inches (129 mm) and an outside diameter of roughly 5.1 inches (130 mm), delivering a compact yet durable drive for light- to medium-duty belt systems. The shaft-ready bore is 1-7/16 inches and comes with a round bore that includes a keyway and setscrew for secure mounting, with the PA thermoplastic (nylon) material providing belt compatibility for Rexnord’s KleanTop belts. Its split design allows installation around an existing shaft without disassembly, simplifying maintenance in conveyor setups. This sprocket is well-suited for material-handling applications where clean operation and low noise are important, offering a reliable, belt-compatible power transmission solution within Rexnord’s NS8500 molded-split lineup.