The LiftMaster 15-48B32QGH Sprocket, also referenced in LiftMaster parts documentation as 48B32LGH, is a genuine OEM replacement sprocket used in the drive train of select LiftMaster GH and LGH commercial hoist (jackshaft) door operators. It transmits power from the operator’s output shaft to the door shaft via roller chain, helping restore smooth, reliable motion when the original sprocket becomes worn or damaged. This factory part is intended for commercial and industrial door applications such as rolling steel and sectional doors where LiftMaster GH/LGH operators are installed.
Use this sprocket only on operators and configurations specified by LiftMaster; compatibility may vary by model, gear ratio, and mounting. For correct selection, confirm the part number against your operator’s manual or official LiftMaster parts diagram using the model and serial number of your unit. Installation should be performed by a qualified technician following lockout/tagout procedures: disconnect power, relieve chain tension, align the sprockets and chain, set proper chain tension and tracking, and secure fasteners as directed by the manufacturer. After replacement, verify proper operation and safety functions per the LiftMaster service instructions. Keywords: LiftMaster GH sprocket, 15-48B32QGH, 48B32LGH, commercial door operator replacement part, hoist operator sprocket, jackshaft operator repair.