Custom Finger Spring Washer Superior Stainless Steel Finger Disc Springs Washer

توضیحات

What is a Finger Spring Washer?

A finger spring washer, also known as a finger washer or spring finger washer, is a type of spring washer designed with multiple protruding “fingers” that provide controlled spring tension and vibration resistance. These washers are used to maintain preload, absorb shock, and compensate for thermal expansion in bolted assemblies. The fingers act as independent springs, allowing for even load distribution and flexibility under dynamic conditions.

Materials

Finger spring washers are manufactured from various high-performance materials to suit different environmental and mechanical requirements:

• Carbon Steel (SAE 1070/1095) – Offers high strength and durability for general-purpose applications.

• Stainless Steel (AISI 302/304/316) – Provides excellent corrosion resistance, making it ideal for marine, chemical, and food-processing industries.

• Phosphor Bronze (C51000/C52100) – Used in electrical applications due to its conductivity and resistance to fatigue.

• Beryllium Copper (C17200) – Combines high strength with corrosion resistance, often used in aerospace and defense.

• Inconel (X750/718) – Suitable for extreme temperatures and high-stress environments like jet engines and nuclear reactors.

Surface Treatments

To enhance performance and longevity, finger spring washers undergo various surface treatments:

• Zinc Plating (Yellow/Blue/Black Zinc) – Improves corrosion resistance and provides a decorative finish.

• Passivation (Stainless Steel) – Removes free iron particles to enhance rust resistance.

• Phosphate Coating (Manganese/Zinc Phosphate) – Increases wear resistance and lubricity.

• Nickel Plating – Offers a hard, corrosion-resistant surface for harsh environments.

• Black Oxide – Provides mild corrosion protection and reduces light reflection.

Specifications

Finger spring washers come in a range of sizes and specifications to fit different applications:

• Inner Diameter (ID): 2mm to 100mm

• Outer Diameter (OD): 5mm to 120mm

• Thickness: 0.2mm to 3mm

• Number of Fingers: 4 to 24 (varies based on load requirements)

• Load Capacity: 5N to 500N per finger (depending on material and thickness)

Applications

Finger spring washers are widely used in industries where vibration damping, thermal expansion compensation, and secure fastening are critical:

• Automotive: Engine mounts, transmission systems, and suspension components.

• Aerospace: Jet engine assemblies, landing gear, and avionics.

• Electronics: PCB mounting, connectors, and heat sinks.

• Industrial Machinery: Pumps, compressors, and heavy equipment.

• Renewable Energy: Wind turbine gearboxes and solar panel mounting systems.

Excellent Case: Finger Spring Washers in Wind Turbine Gearboxes

Challenge:

Wind turbine gearboxes experience extreme vibrations and dynamic loads due to fluctuating wind forces. Traditional washers often fail to maintain bolt tension, leading to loosening and premature wear.

Solution:

High-grade stainless steel finger spring washers were integrated into the gearbox assembly. The washers provided:

• Continuous Spring Action: The fingers maintained consistent pressure, compensating for thermal expansion and vibration.

• Vibration Damping: Reduced micro-movements between bolted joints, preventing fretting corrosion.

• Longevity: The corrosion-resistant material withstood harsh weather conditions.

Result:

The gearbox showed a 40% reduction in maintenance downtime and a 25% increase in service life, significantly lowering operational costs.