Application Background
Aerospace turbine components are commonly coated with Thermal Barrier Coatings (TBCs) to provide excellent heat resistance and insulation.
A typical TBC structure includes Yttria-Stabilized Zirconia (YSZ) as the top coat, with an underlying Ni/Co-based MCrAlY alloy layer that provides oxidation and fatigue protection.
However, during turbine manufacturing processes, the coating may unintentionally penetrate cooling holes or cover areas that should remain uncoated, resulting in overspray.
If not thoroughly removed, this overspray can block cooling passages, reduce heat dissipation efficiency, and ultimately affect turbine performance and service life.
Machining Challenges
Extremely small and deep hole diameters, making it impossible for conventional grinding pins to enter due to dimensional limitations.
High hardness of TBC materials—traditional tools lack sufficient cutting force to remove coatings effectively.
Laser or EDM cleaning, although possible, may cause heat-affected zones, cracks, or deformation of hole geometry.
Our Solution
Micro-Diameter Deep-Hole Electroplated Grinding Pins
- pecifically designed for micro-hole coating removal, capable of accurately removing overspray and restoring hole dimensions to maintain proper cooling performance.
- Manufactured with precision and using electroplated technology, ensuring both durability and high efficiency.
- Particularly suitable for hard thermal barrier coatings such as YSZ.
- Diamond abrasives ensure no contamination or damage to surrounding components.
- Faster, cleaner, and more precise than conventional grinding methods.
- Significantly improves the reliability and service life of turbine blades and engine components in aerospace applications.
- Custom dimensions are available to meet both OEM and MRO requirements.
Product Features
Micro-Diameter Deep-Hole Electroplated Grinding Pins
- Minimum diameter down to 0.4 mm, ideal for ultra-small cooling holes.
- Effective cutting length up to 30 mm, enabling easy access to deep-hole machining areas.
- Heat-treated shank material provides excellent flexibility and break-resistance, reducing the risk of tool fracture.
