The LiftMaster K10-10191-GR Brake Disc is a genuine OEM replacement component for select LiftMaster commercial door operators. Designed for the electromechanical brake assembly, this disc engages with the brake hub to deliver consistent stopping and holding force, helping safely stop and secure overhead doors in warehouses, loading docks, and other commercial or industrial applications. It is a direct-fit service part used to restore braking performance on operators that employ a mechanical holding brake, including common jackshaft, hoist, and trolley configurations.
Use this replacement brake disc when braking performance declines, when the disc shows wear or glazing, or as part of scheduled preventive maintenance. Installation is mechanical and does not require programming; follow the LiftMaster service manual for your specific operator to disconnect power and perform proper lockout/tagout, remove the brake cover, replace the disc, inspect mating friction surfaces, set the correct air gap and spring tension as specified, and test-run the operator to verify stopping distance and holding torque. Compatibility varies by operator model; confirm with the operator’s parts diagram or by referencing the K10-10191-GR part number with LiftMaster/Chamberlain support or an authorized distributor. For safety, perform all adjustments according to manufacturer instructions and applicable codes for commercial door operators.