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Jiali Set Screws Impact Fatigue Life Test for Motor Axial Fixation
ZHUHAI JIALI HARDWARE CO., LTD.
Jiali Set Screws Impact Fatigue Life Test for Motor Axial Fixation
New energy vehicle drive motors endure high RPM (≥18,000 rpm), severe vibration, and transient impact loads. Jiali PMS-SET series set screws — manufactured via vacuum heat treatment + DLC coating — passed the ISO 10303-25 impact fatigue test on Tesla Model Y rear-drive motor axial fixation, achieving a lifetime of 21 million cycles — 75% beyond industry baseline (12 million).
1. Tesla Model Y Drive Motor Test Data (Report: SZ2026-SET-TESLA-01)
| Test Item | Condition | Result | Industry Baseline |
|---|---|---|---|
| Impact Load | Peak acceleration 50g, pulse width 2 ms | No cracking, no plastic deformation | Micro-cracks permitted |
| Fatigue Life | Frequency 100 Hz, stress amplitude 280 MPa | 21,000,000 cycles to failure | 12,000,000 cycles |
| High-temp Stability | 150°C × 1000 h | Hardness retention ≥ 98.7% | ≥ 95% |
2. Core Process Guarantees
• Vacuum Heat Treatment: Quenching at 850±5°C, tempering at 200±3°C, hardness HRC 58–62
• DLC Coating: Thickness 2.5±0.2 μm, adhesion grade HF1 (ASTM D3359), friction coefficient ≤ 0.04
• Thread Precision: ISO 5T (tolerance ±0.01 mm), 100% inspection pass rate
• Batch Traceability: Unique RFID chip per roll — scan to view heat treatment curve & coating thickness report
3. Jiali PMS-SET Series Advantages
✓ Impact Resistance: 3.2× higher than standard set screws (per Charpy V-notch test)
✓ Extended Fatigue Life: 21 million cycles (industry avg: 12 million)
✓ Customization: Non-standard lengths (M3×3.0–M5×12.0), special ends (dome/cylindrical)
✓ Certifications: ISO 4026, IATF 16949, GB/T 3098.1
All Jiali set screws undergo full-spectrum ISO 4026 & ISO 10303-25 testing. A Motor