Busbar Joint Belleville Washer with Zinc-plated Surface
Model | Material | Hole Diameter | Surface Treatment |
φ37*3mm | 65Mn | φ8.5mm | Galvanized Treatment |
φ74*4mm | 65Mn | φ13mm | Dacromet Treatment |
φ75*5mm | 65Mn | φ13mm | Dacromet Treatment |
φ76*5mm | 65Mn | φ13mm | Dacromet Treatment |
φ90*6mm | 65Mn | φ13mm | Dacromet Treatment |
This is a specialized Belleville washer designed for busbar trunking / busduct connections, featuring a zinc-plated surface. Its primary function is to provide sustained elastic loading at the connection point.
Key Technical Features
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Material Specifications
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Main material: 65Mn spring steel
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Thickness range: 3–6 mm
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Outer diameter: φ37–90 mm
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Inner diameter (hole): φ8.5–13 mm
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Surface Treatment
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Zinc galvanizing (Galvanized Treatment)
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Optional Dacromet coating (Dacromet Treatment)
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Excellent corrosion resistance
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Functional Characteristics
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Elastic load: Conical design generates reactive spring force under compression
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Load distribution: Evenly spreads clamping pressure, preventing local stress concentration
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Thermal-expansion compensation: Accommodates busbar expansion/contraction caused by temperature changes
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Anti-loosening & anti-vibration: Maintains constant preload, preventing connection loosening
Application Scenes
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Busbar joint connections
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Electrical-equipment connection points
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Conductive joints requiring thermal-expansion compensation
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Electrical connections in high-vibration environments
Installation Guidance
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Normally used in pairs, one on each side of the bolt
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Recommended torque: 70 N·m – 90 N·m
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Must be used with matching shear-off bolts
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Ensure full surface contact during installation
Advantages
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High reliability: Delivers long-term stable connection performance
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Strong adaptability: Suitable for diverse environments; passes 300-hour salt-spray test
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Easy maintenance: Simple to install and remove
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Cost-effective: More economical than alternative connection methods
