The LiftMaster 15-35B13GEF is a drive sprocket used in chain-driven LiftMaster door operators to transmit power from the motor shaft to the roller chain. Identified as 35B13T, this part is engineered for ANSI #35 roller chain with a 3/8 inch pitch and a 13-tooth profile, providing smooth, reliable engagement for consistent door movement. It serves as a direct replacement part for select LiftMaster commercial or industrial chain-drive operators where a #35 drive sprocket is specified, helping restore proper operation when the original sprocket is worn or damaged.
Typical use involves installation on the operator’s output shaft and alignment to the drive chain for correct tracking and minimal wear. For safety, power should be disconnected and the door secured before service; after replacement, verify chain tension and track alignment, and check travel limits per the operator’s manual. This LiftMaster sprocket is suitable for applications requiring dependable power transmission in chain-driven trolley or jackshaft/hoist configurations. Confirm compatibility with your operator’s parts list or service manual using the exact part number 15-35B13GEF and the 35B13T designation before ordering.