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By Shape

Belleville Washer
A Belleville washer, also known as a disc spring or conical spring washer, is a specially engineered fastener with a conical shape. Unlike flat washers, it functions as a high-capacity spring element, providing substantial axial force and deflection within a compact space to maintain critical bolt preload and compensate for thermal expansion or relaxation in assemblies.
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  • Product details

    Typical Applications:

    • Bolted Joint Preload: Essential in high-pressure flanges, valve assemblies, and critical bolted connections where maintaining a precise, constant clamping force is paramount to prevent leakage or joint failure.

    • Vibration & Shock Absorption: Used in demanding environments such as heavy machinery, powertrains, and rail systems to dampen vibrations and absorb dynamic loads, preventing fastener loosening.

    • Thermal Expansion Management: Applied in systems with significant temperature fluctuations (e.g., engines, pipelines) to compensate for the differential expansion and contraction of materials.

    Our Product & Custom Capabilities:
    We supply Belleville washers in a range of standard sizes and materials, with extensive customization to meet specific load-deflection requirements. Our capabilities include:

    • Material & Performance: Carbon steel, alloy steel (e.g., 51CrV4), and stainless steel (e.g., 17-7PH) to achieve desired spring characteristics and corrosion resistance.

    • Geometric Customization: Precise control over key dimensions—including outer/inner diameter, cone height, thickness, and the presence of slots or flat segments—to tailor the spring's force curve (load-deflection characteristics).

    • Surface Treatment: Plating, phosphating, or specialized coatings to reduce friction and enhance durability in operation.

    Our Belleville washers deliver a reliable and space-efficient solution for applications requiring high spring force, controlled preload, and long-term performance stability under extreme conditions.