INDUSTRY COMPONENT

Sealing O-ring

A toroidal sealing ring used in lens mounts and housings to prevent fluid or gas leakage.

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Component Specifications

Definition
An O-ring is a mechanical gasket in the shape of a torus (doughnut-shaped ring) designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. In lens mounts and housings, it specifically prevents the ingress of dust, moisture, or other contaminants while maintaining internal pressure or vacuum conditions critical for optical performance.
Working Principle
The O-ring creates a seal through elastic deformation when compressed within a gland (groove). The resulting contact pressure between the O-ring and mating surfaces blocks the passage of fluids or gases. Its circular cross-section allows it to seal in both axial and radial directions, accommodating minor movements and thermal expansion.
Materials
Typically made from elastomers such as Nitrile Rubber (NBR), Fluorocarbon (FKM/Viton), Silicone (VMQ), or Ethylene Propylene Diene Monomer (EPDM), selected based on temperature range, chemical resistance, and compression set requirements.
Technical Parameters
  • Hardness 70-90 Shore A
  • Inner Diameter Varies by application (e.g., 5-50 mm)
  • Pressure Rating Up to 10 MPa static
  • Temperature Range -40°C to +200°C (material-dependent)
  • Cross-Section Diameter Commonly 1-5 mm
Standards
ISO 3601, AS 568, JIS B 2401

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sealing O-ring.

O-ring seal lens housing seal optical equipment gasket elastomer sealing ring ISO 3601 O-ring Sealing O-ring Sealing O-ring in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Lens Mount / Housing

A structural component that securely holds and positions the optical elements within a collimating lens assembly.

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Engineering Analysis

Risks & Mitigation
  • Chemical degradation from cleaning solvents
  • Extrusion under high pressure
  • Thermal expansion mismatch
  • Installation damage (nicking, twisting)
FMEA Triads
Trigger: Incorrect gland design (e.g., insufficient compression)
Failure: Leakage due to inadequate sealing pressure
Mitigation: Follow ISO 3601 gland design standards; verify compression ratio (typically 15-30%)
Trigger: Material incompatibility with optical lubricants
Failure: Swelling or cracking of O-ring
Mitigation: Test material compatibility with specific fluids; use FKM or FFKM for aggressive chemicals

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.10 mm on inner diameter per ISO 3601-1
Test Method
Leak testing via pressure decay or helium mass spectrometry; compression set testing per ASTM D395

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the most common cause of O-ring failure in lens mounts?

Compression set, where the O-ring loses elasticity over time due to continuous compression, leading to seal leakage.

How do I select the right O-ring material for a lens housing?

Consider operating temperature, exposure to UV light, chemical compatibility with lubricants or cleaning agents, and required compression set resistance. FKM is often used for high-temperature stability.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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