The Wiper (OEM Part No. 0665923501) is a replacement sealing component designed for Epiroc / Atlas Copco rock drill and rotation unit assemblies. It is compatible with COP 1638 and COP 2560 rock drills, DHR 6H and DHR 6H-SH rotation units, and selected FlexiROC D65 and SmartROC D65 drilling equipment. The 0665923501 Wiper helps prevent dust, water and other contaminants from entering critical internal surfaces while supporting reliable sealing performance around moving components. It is suitable for routine maintenance and replacement when the existing wiper becomes worn, hardened, damaged or no longer provides effective contamination protection. The 0665923501 Wiper helps protect adjacent seals and internal components and supports reliable drilling-system operation.