Disc Spring Washer vs Disc Washer: Butterfly Washers Anti-Loosening Industrial Solutions

Disc Spring Washer vs Disc Washer: Industrial Anti-Loosening Solutions

Many engineers and buyers often ask: Is a disc washer the same as a disc spring washer? The answer is yes—“disc washer” is simply a shortened term for disc spring washer.

Also known as butterfly washers, disc spring washers are a type of tapered spring washer designed to improve the reliability of bolted joints. Their unique tapered geometry and serrated surface ensure superior anti-loosening and anti-vibration performance compared to standard flat or spring washers.

How Disc Spring Washers Work

A disc spring washer is naturally tapered, and when the nut or bolt is tightened:

1. The washer flattens under axial load.

2. The taper generates a reactive elastic force, pressing      the nut firmly against the joint.

3. The serrated ribs on the washer surface bite into the      connected parts, increasing resistance to loosening.

This design ensures uniform force distribution, strong vibration resistance, and reliable preload maintenance.

Disc spring washers are commonly manufactured from 65Mn spring steel, which provides high elasticity and long service life.

Standard Specifications and Materials

Typical disc spring washer specifications include:

• 36 × 71 × 4.0 mm

• 22.5 × 45 × 2.5 mm

• 14.2 × 28 × 1.5 mm

• 12.5 × 25 × 1.5 mm

Material: 65Mn spring steel (commonly), other options include stainless steel or heat-treated alloys for specialized applications.

Standards:

• DIN 2093 – Disc spring washers      (primary industrial standard)

• DIN 6796 – Anti-loosening conical      washers

Installation Guidelines for Butterfly Washers

Proper installation is critical to ensure the washer performs as intended:

1. Orientation: The concave side      should face the connector, the convex side toward the nut.

2. Tightening: As the nut is      tightened, the disc spring washer deforms, creating a reactive surface      that locks the fastener.

3. Teeth Alignment:

• Inner teeth: For smaller screw heads

• Outer teeth: For bolts and nuts

 Note: Adjustable toothed washers are highly effective but should not be used for components that require frequent disassembly, as repeated tightening may reduce effectiveness.

Industrial Applications of Disc Spring Washers

Thanks to their low cost, ease of installation, and high reliability, disc spring washers are widely used in industries such as:

• Automotive manufacturing

• Electrical and power equipment

• Construction machinery

• Machine tools and precision equipment

• Aerospace and aviation

• Defense systems

• Medical devices

In all these applications, butterfly washers ensure bolt preload stability and vibration resistance, even in demanding environments.

Why Use Disc Spring Washers?

Disc spring washers are preferred over other washer types for the following reasons:

• Excellent anti-loosening and anti-vibration performance

• Compact size with high axial load capacity

• Cost-effective manufacturing and easy installation

• Durable under dynamic or cyclic loads

By selecting the appropriate DIN 2093 or DIN 6796 washer, engineers can optimize bolt performance and joint safety in industrial machinery.

If you are looking for high-quality fastener screws, disc spring washers, or technical support for structural design, please contact us:

Email: adelajonly@gmail.com
Website: www.juxinfasteners.com