Friction Washer: Temperature Range -40°C to +200°C

Component Specifications

Definition

A friction washer is a precision-engineered disc-shaped component designed to be installed between moving parts in yoke/hinge assemblies. It creates controlled frictional resistance through surface contact, preventing unwanted movement, backlash, or vibration while allowing smooth, controlled articulation. Unlike standard washers that primarily distribute load, friction washers are specifically engineered with surface treatments, materials, or geometric features to maintain consistent torque resistance and positional stability in dynamic applications.

Working Principle

The friction washer operates on the principle of surface friction and controlled resistance. When compressed between moving surfaces in a yoke/hinge assembly, it creates a predetermined frictional force that resists relative motion. This is achieved through: 1) Surface roughness/texture creating micro-interlocking, 2) Material properties providing consistent coefficient of friction, 3) Compression force from fasteners increasing normal force, and 4) Geometric design ensuring even pressure distribution. The washer maintains this resistance throughout the operational range, preventing spontaneous movement while allowing controlled adjustment when sufficient force is applied.

Materials

Common materials include: 1) Spring steel (EN 10270-1 SH, AISI 1074/1075) for high durability and consistent friction, 2) Stainless steel (AISI 304/316) for corrosion resistance, 3) Phosphor bronze (C51000) for non-sparking applications, 4) Aluminum bronze (C95400) for high strength, 5) Composite materials with embedded friction particles. Surface treatments: Zinc plating, phosphate coating, or specialized friction coatings (molybdenum disulfide, polymer-based).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	HRC 40-55
Thickness	0.5-3.0 mm
Inner Diameter	5-25 mm
Outer Diameter	10-50 mm
Surface Roughness	Ra 1.6-3.2 μm
Temperature Range	-40°C to +200°C
Compressive Strength	400-800 MPa
Friction Coefficient	0.15-0.35

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 7089, DIN 6796, ISO 8738, DIN 988

Parent Products

This component is used in the following industrial products

Yoke/Hinge Assembly

A mechanical assembly that connects and allows rotational movement between headband segments.

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Engineering Analysis

Risks & Mitigation

Incorrect torque application leading to premature wear
Material incompatibility causing galvanic corrosion
Surface contamination reducing friction effectiveness
Improper installation orientation affecting performance
Temperature extremes altering friction properties

FMEA Triads

Trigger: Insufficient surface roughness or contamination
Failure: Reduced friction coefficient leading to unintended movement
Mitigation: Implement surface quality inspection, proper cleaning procedures, and controlled storage environments

Trigger: Material fatigue from cyclic loading
Failure: Cracking or permanent deformation reducing effectiveness
Mitigation: Use fatigue-resistant materials, proper torque specification, and regular maintenance intervals

Trigger: Corrosion in harsh environments
Failure: Surface degradation and inconsistent friction
Mitigation: Select corrosion-resistant materials, apply protective coatings, and implement environmental controls

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on diameter, ±0.05 mm on thickness, surface roughness within ±10% of specification

Test Method

ISO 16047 for torque-tension testing, ASTM G115 for friction coefficient measurement, visual inspection per ISO 2859-1

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Friction Washer

Manufacturer profiles associated with Friction Washer.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a friction washer and a standard flat washer?

A friction washer is specifically engineered with surface treatments or materials to create controlled resistance to movement, while a standard flat washer primarily distributes load and prevents surface damage. Friction washers maintain consistent torque resistance in dynamic applications.

How do I select the right friction coefficient for my application?

Select based on required resistance: lower coefficients (0.15-0.20) for smooth adjustment applications, medium (0.20-0.25) for general hinge resistance, and higher (0.25-0.35) for vibration-prone or high-load applications where movement prevention is critical.

Can friction washers be reused after disassembly?

Generally not recommended. The surface characteristics and friction properties degrade with use. Reuse can lead to inconsistent performance, reduced resistance, and potential failure. Always replace with new washers during maintenance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Friction Washer