Release time：2020-01-16 18:44 Browse：
### 1. **Product Portfolio** Specialized manufacturer of customized extra-long steel hexagonal cup head screws, paired with new energy motor spring pads and plain finish flat washers for integrated fastening solutions. ### 2. **Key Design Features** #### - **Extra-Long Bolts** - Custom lengths from 50mm to 1,000mm, ideal for deep assemblies in new energy motor stators/rotors or multi-layer battery pack structures. - Diameters: M6–M30 (metric) / 1/4"–1" (imperial), with 6g thread tolerance for precise engagement. #### - **Hexagonal Cup Head** - Internal hex drive for high-torque transmission (20% more efficient than standard bolts), compatible with Allen keys and automated tools. - Rounded chamfer reduces stress concentration under motor vibration-induced alternating loads. #### - **New Energy Motor Spring Pads** - Material: 60Si2Mn spring steel (quenched & tempered, HRC42–48), fatigue life ≥10⁶ cycles. - Wave/disc shapes available, providing 10–50N·m elastic preload to compensate for thermal expansion in motors. #### - **Plain Finish Flat Washers** - Q235 carbon steel or 304 stainless steel, uncoated (plain finish) for dry indoor use or post-installation coating. - Dimensions per ISO 7089 (e.g., M12 bolt with φ24mm washer), thickness 1–5mm adjustable. ### 3. **Materials & Surface Treatments** - **Bolts**: - Carbon steel: 45# (tensile ≥600MPa) or 40Cr (≥980MPa) for load-bearing motor components. - Stainless steel: 316L for marine-grade motor compartments (salt spray test ≥1,000hrs, ASTM B117). - **Optional Coatings**: - Upgrade from plain finish to zinc plating, Dacromet, or chrome-free passivation for enhanced corrosion resistance. ### 4. **Manufacturing Processes** - **Bolts**: Hot forging (large diameters) / cold heading (small diameters), rolled threads (30% higher fatigue strength than cut threads). - **Spring Pads**: Stamped & shot-peened for surface compressive stress ≥300MPa, minimizing fatigue failure. - **Precision Control**: Dimensional tolerances within ±0.1mm (e.g., bolt length, spring pad free height) per ISO 4762. ### 5. **New Energy Applications** - **EVs**: Drive motor stator bolts, battery pack fasteners for Tesla/BYD platforms. - **Energy Storage**: Battery rack connections in energy storage cabinets, inverter housing with IP67 requirements. - **Wind Power**: Small turbine generator shaft bolts, spring pads absorbing blade vibration. ### 6. **Quality Assurance** - **Mechanical Tests**: Tensile testing (break load ≥110% of standard), torque-preload curve analysis for each batch. - **Spring Performance**: Load-deflection testing to ensure ≤5% force decay at rated compression. - **Certifications**: ISO 9001:2015 reports, PMI (material composition analysis), RoHS compliance available. ### 7. **Customization Services** - **Engineering Support**: CAD/3D modeling to optimize bolt length & spring pad stiffness. - **Special Requirements**: Non-standard heads (e.g., countersunk hex), anti-loosening designs (thread adhesive/serrated washers), laser marking. - **Low-Volume Prototyping**: 50–100-piece minimum orders for R&D-stage new energy projects. ### 8. **Packaging & Logistics** - Anti-collision packaging: PE bags + cartons for bolts/washers, moisture-proof paper for spring pads. - Lead Times: 3–7 days for standard items, 15–25 days for custom parts, international shipping via DHL/UPS.
