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Jiali Locking Screws Torque Decay Report on Industrial Robot Joints
ZHUHAI JIALI HARDWARE CO., LTD.
Jiali Locking Screws Torque Decay Report on Industrial Robot Joints
Industrial robot joints demand extreme long-term locking reliability from fasteners. Jiali PMS-LK series locking screws underwent continuous 10⁷ reciprocating motion tests on the KUKA KR10 robot’s Axis 4 joint — torque decay rate was only 1.8%, far superior to industry average (≥7.2%).
1. KUKA KR10 Joint Test Data (Report: SZ2026-LK-KR10-01)
| Test Item | Initial Value | After 10⁷ Cycles | Decay Rate | Industry Avg |
|---|---|---|---|---|
| Preload Torque (N·m) | 4.2 | 4.12 | 1.9% | ≥7.2% |
| Axial Tensile Force (N) | 6200 | 6120 | 1.3% | ≥5.8% |
| Joint Positioning Accuracy (μm) | ±1.2 | ±1.25 | +0.05μm | +0.8μm |
2. Core Process Guarantees
• Nylon Insert: High-temp formulation (Tg=125°C), 100% thermal melt coverage of threads
• Torx Drive: Hexalobular structure, 32% larger contact area → reduced cam-out risk
• Surface Finish: Eco-friendly trivalent chromium passivation (GB/T 9799 Class 2)
• QC Flow: 100% torque-tensile curve scanning per batch + pre/post-vibration dual inspection
3. Jiali PMS-LK Series Advantages
✓ Torque decay ≤ 2.0% (10⁷ cycles)
✓ Supports high-frequency reassembly (>20 cycles without performance loss)
✓ Customization: Non-standard lengths (M4×8–M6×25), special heads (flange/countersunk)
✓ Certifications: ISO 10664, ISO 9001, ISO 14001
All Jiali locking screws undergo full-spectrum ISO 10664 testing. A Torque