The LiftMaster 15-100B15TKK Sprocket is a genuine OEM drive component for select LiftMaster commercial door operators and openers. Identified by the industry designation 100B15T with a 1-1/2 in bore, it is a 15-tooth sprocket designed to run with ANSI #100 roller chain, transmitting power between the motor and door shaft in jackshaft and hoist configurations. Use this replacement part when your operator’s parts diagram specifies 15-100B15TKK to maintain proper gearing, dependable chain engagement, and smooth operation in demanding residential/commercial applications.
Compatibility depends on your operator’s shaft diameter and chain pitch; confirm that your unit calls for a 100B15T sprocket with a 1-1/2 in bore before purchasing. Installation typically involves mounting on the keyed shaft, aligning with the mating sprocket, and adjusting chain tension per LiftMaster service procedures. For safety, disconnect power and follow lockout/tagout and spring tension precautions; service should be performed by qualified personnel. This component is commonly referenced across manufacturer and distributor catalogs as LiftMaster 15-100B15TKK, 100B15T sprocket, or 1-1/2 in bore sprocket for ANSI #100 chain, making it a reliable, like-for-like replacement for compatible LiftMaster industrial-duty operators.