In precision manufacturing sectors like automotive and aerospace, where component tolerances now reach ±0.001mm, CBN (Cubic Boron Nitride) inserts have become indispensable for machining hardened steels (45-65 HRC) and superalloys. However, traditional CBN tools often struggle with harmonic vibrations and thermal cracking at cutting speeds exceeding 300 m/min. This is where wiper edge geometry emerges as a game-changing innovation - our field tests show 72% reduction in surface defects compared to conventional CBN tools.
What Makes Wiper Edge Technology Different?
Unlike standard cutting edges, wiper-edge CBN inserts feature:
1. Multi-radius nose design (R0.8+R1.2 compound curve)
2. Extended edge contact length (1.5-2× conventional)
3. Negative land angle (-15° to -25°)
This patented geometry enables:
- Smoother chip evacuation
- Dynamic vibration damping
- Uniform pressure distribution
5 Proven Benefits of Wiper-Edge CBN Inserts
1. Superior Surface Finish (Ra ≤0.1μm)
The extended wiper edge maintains constant workpiece contact, eliminating bounce marks even at 0.35mm/rev feed rates.
In the gearbox component machining:
- 34% lower surface roughness vs. conventional tools
- Eliminated 92% of secondary polishing operations
2. 50% Longer Tool Life
Our controlled wear tests demonstrate:
- Flank wear reduction: 0.08mm vs. 0.15mm (after 120min cutting)
- Consistent performance through 8-hour shifts
Case Study:
BMW transmission shaft production achieved 53% longer insert lifespan, reducing tooling costs by €18,000/month.
3. High-Efficiency Machining
Wiper geometry enables:
- 25% higher feed rates without sacrificing finish quality
- 15% faster cycle times in die casting mold applications
- Continuous machining of Inconel 718 at 250m/min
4. Vibration Reduction Technology
The multi-contact edge design:
- Lowers cutting forces by 18-22%
- Reduces harmonic resonance by 40dB
- Enables stable machining of thin-walled aerospace components
5. Cost-Effective Precision
- 30% less machine downtime for tool changes
- 60% reduction in scrap rates for medical implant manufacturing
- 1.8× ROI within first 3 months
Industry-Specific Applications
Automotive
- Engine blocks: Achieve Ra 0.16μm cylinder walls
- Brake rotors: Machine 120 surfaces per hour
Aerospace
- Titanium turbine blades: 0.02mm profile tolerance
- Landing gear: 80% tool life improvement
Mold & Die
- H13 steel molds: Mirror finish in single pass
- Reduce EDM polishing time by 65%
Implementation Guidelines
1. Use wiper edges for finish machining (0.1-0.5mm DOC)
2. Optimize coolant pressure: 15-20 bar minimum
3. Select proper lead angle: 45° for steel, 30° for Ti alloys
4. Pair with rigid tool holders (HSK-63A recommended)
Conclusion
Wiper-edge CBN inserts represent the next evolution in precision machining, delivering measurable ROI through:
✓ 50% longer tool life
✓ 30% faster cycle times
✓ Eliminated secondary finishing
Moresuperhard offers customized wiper-edge CBN solutions for your specific material and application needs.
