Sinowon Ultrasonic Hardness Tester for New Energy Vehicle Motor Shaft Hardness Testing

Motor shafts in new energy vehicles (NEVs) are typically made of low-carbon or medium-carbon alloy steel, where Rockwell hardness serves as a critical mechanical property indicator. Conventional hardness testing methods face challenges such as high investment costs for automated Rockwell testing lines and large indentations (≈80μm at 60HRC) that damage precision components, making on-site rapid testing impractical. Addressing these pain points, Sinowon’s self-developed SIG 3N Electric Ultrasonic Hardness Tester delivers a high-efficiency, precision solution with non-destructive testing as its core advantage.

Why Hardness Testing Matters for NEV Motor Shafts

NEV motor shafts require strict hardness control to ensure durability and performance. Traditional methods present two key drawbacks:

• High capital expenditure: Automated Rockwell hardness testing lines are cost-prohibitive.
• Destructive testing: Rockwell testers leave deep indentations (≈80μm at 60HRC), compromising assembly precision and forcing scrap disposal of tested parts.

Technological Breakthrough: SIG 3N Ultrasonic Hardness Tester

Sinowon’s SIG 3N introduces innovative advancements:

• Micro-indentation (4μm at 60HRC/697HV0.3): 95% shallower than Rockwell testers, preserving part integrity.
• 3N test force: Ensures accuracy while minimizing workpiece impact.
• Non-destructive testing: Enables 100% inspection with zero scrap.

Comparison: Traditional vs. SIG 3N

Practical Benefits

• Quality assurance: 100% hardness inspection for motor shafts guarantees consistent quality.
• Cost savings: Eliminates scrap losses, reducing annual quality costs significantly.
• Process optimization: Provides comprehensive data for heat-treatment improvements.
• Efficiency gain: 3–5x faster testing speeds versus traditional methods.

Client Testimonial

A leading NEV motor manufacturer reported:
"After adopting Sinowon’s ultrasonic hardness tester, we achieved 100% shaft inspection, saving over ¥2 million annually in scrap costs. The detailed hardness data also empowered our process upgrades."

Key Features

• Near-invisible indentations: 4μm-depth marks ensure no functional impact.
• Smart calibration: Auto temperature compensation and curvature correction.
• Industry 4.0 ready: Seamless MES integration for data traceability.
• Ergonomic design: Streamlined for continuous production-line operation.

Sinowon’s ultrasonic hardness tester offers a cost-effective, high-precision solution for NEV motor shaft testing, meeting stringent QC requirements without product waste.

Contact our technical team for SIG 3N specifications or customized application support!