Release time：2020-01-16 18:44 Browse：
### 1. **Strength & Material** - **8.8 Grade Certification**: - Tensile strength ≥800 MPa, yield strength ≥640 MPa (per ISO 898-1), ensuring reliable performance in high-stress applications like motor mounts. - Manufactured from medium-carbon steel (e.g., 45# steel) or boron steel (e.g., 10B21), heat-treated to achieve optimal hardness (24-30 HRC) and toughness balance. ### 2. **Design Features** - **Extended Shank Geometry**: - Customizable lengths (e.g., 50mm–300mm) for deep penetration through thick motor bases, gearboxes, or multi-layered structural components. - Threaded portion (typically 1/3 to 1/2 of total length) optimized for engaging nuts or tapped holes securely. - **Integral Flange**: - Flange diameter 1.5–2x bolt shank diameter (e.g., M12 bolt with 18–24mm flange) for uniform pressure distribution. - Prevents surface damage to soft materials (e.g., aluminum motor housings) and reduces the risk of loosening under vibration. - **Pan Head**: - Flat head with rounded edges (height ~0.7x bolt diameter) for flush mounting in confined spaces. - Ideal for applications where protrusions could interfere with moving parts (e.g., cooling fans). ### 3. **Drive & Compatibility** - **Hexagon Drive**: - Standard 6-point hex head (size matched to bolt diameter, e.g., M12 bolt uses 19mm wrench) for efficient torque application. - Precision-machined flats ensure minimal slippage during installation, even with power tools. - **Thread Specifications**: - Coarse threads (e.g., M12 x 1.75) for faster assembly in soft materials; fine threads (e.g., M12 x 1.5) for high-precision applications. - Thread tolerance 6g (external) for smooth engagement with 6H internal threads in motor components. ### 4. **Surface Treatment** - **Zinc Plating**: - 8–12μm thick zinc coating (ASTM B633 Type II) provides corrosion resistance for indoor/dry environments. - Optional trivalent chromium passivation for enhanced salt spray resistance (≥72 hours to white rust per ASTM B117). - **Specialty Coatings**: - Phosphate coating for improved paint adhesion in motor assemblies requiring additional finishing. - Dacromet® or Xylan® coatings for extreme corrosion resistance in marine or chemical environments. ### 5. **Applications** - **Motor Mounting**: - Secures electric motors (up to 100kW) to frames, reducing vibration-induced loosening. - Used in HVAC systems, industrial pumps, and conveyor drives. - **Heavy Machinery**: - Fastens gearboxes, couplings, and bearings in high-torque applications (e.g., construction equipment). - Suitable for flanged joints in pipelines or structural steel connections. ### 6. **Performance Advantages** - **Vibration Resistance**: - Flange design increases friction between mating surfaces, reducing self-loosening under dynamic loads. - Tight thread tolerance minimizes backlash in vibrating environments. - **Load Distribution**: - Flange spreads clamping force over ~3x larger area than standard bolt heads, preventing material deformation. - Extended shank reduces stress concentration at thread-root junctions. ### 7. **Compliance & Standards** - **Quality Assurance**: - Manufactured per ISO 4017 (hex bolts) and ISO 7045 (flange bolts). - Certified to meet GB/T 3098.1 (China) or DIN 267 (Germany) standards for mechanical properties. - **Testing**: - Mandatory tensile, hardness, and torque tests for each production batch. - Non-destructive testing (e.g., magnetic particle inspection) for crack detection in critical applications. ### 8. **Installation Guidelines** - **Torque Recommendations**: - For M12 bolts: 55–70 Nm (dry) or 40–50 Nm (lubricated) to prevent over-tightening and thread stripping. - Use torque wrenches or angle-tightening methods for precision. - **Pre-Installation Checks**: - Verify thread cleanliness and apply anti-seize compound in high-temperature environments (e.g., engine mounts). - Ensure flange surface is free of debris to maintain uniform clamping. ### 9. **Industry Certifications** - **Common Approvals**: - CE marked for compliance with EU machinery directives. - RoHS-compliant coatings for environmental safety. - **Specialized Use**: - ATEX-certified options available for explosive atmospheres (e.g., mining or chemical plants). ### 10. **Packaging & Storage** - **Corrosion Prevention**: - Packaged in sealed poly bags with desiccants to prevent moisture ingress during storage. - Recommended storage in dry environments (<60% relative humidity). - **Traceability**: - Batch numbers printed on packaging for full material traceability from raw steel to finished product.
