🔎Workpiece
- Quartz Glass
- Workpiece: D30 x 250mm
- Hole: D7.8 x 250mm
- Depth-to-Diameter Ratio 32:1
❌Challenges
- High requirement of hole parallelism and hole wall quality
- Hole edge chipping
- Long cutting tool of how rigidity
✅Benefits
- Hole wall roughness 0.122~0.232μm with ultrasonic machining
- Hole parallelism <0.0385mm (vs. required<0.8μm)