The Thrust Washer is used to support the elevator speed reducer shaft sun gear assembly, which supports axial load by creating a stable thrust surface between the sun gear and adjacent components. It helps maintain correct gear spacing, preventing metal‑to‑metal contact that could cause friction, overheating, or premature wear. The washer keeps the sun gear aligned during rotation, ensuring consistent engagement with planetary gears and smooth power transfer through the reducer system.Attributes:• Maintains proper spacing and alignment.• Reduces friction between rotating components.• Ensures smooth and stable operation.• Hardness Rockwell C 46-50.Applications: The Thrust Washer is used in the elevator speed reducer shaft sun gear assembly to support axial loads and ensure smooth rotation between contacting components.