The GST-ND series is engineered specifically for heat management and process stability in deep internal cladding. It adopts an internal-cavity spiral water-cooling system, providing stronger and more uniform cooling for long-duration operation in high-power cladding environments. To fit different bore geometries and process windows, the optics head supports multiple nozzle specifications, improving adaptability for internal diameters, access constraints, and application scenarios (ID build-up, sealing surfaces, internal wear rings, blind-hole repairs, etc.). For users who need better process visibility and quality control, the GST-ND can be configured with optional CCD monitoring, making it easier to observe the melt pool/cladding process and support more consistent results. With standardized interfaces and selectable focal configurations, the series is optimized for production lines and remanufacturing stations that require repeatability, stable cladding performance, and efficient integration.