INDUSTRY COMPONENT

Seals/Shields

Seals and shields for linear bearings that prevent contamination and retain lubrication to extend bearing life.

Component Specifications

Definition
Seals and shields are protective components integrated into linear bearings to create barriers against external contaminants such as dust, dirt, moisture, and debris, while simultaneously retaining internal lubricants. They are critical for maintaining bearing performance, reducing wear, and preventing premature failure in industrial applications.
Working Principle
Seals and shields function by creating physical barriers through contact or non-contact designs. Contact seals (like lip seals) press against moving surfaces to block contaminants, while non-contact shields use tight clearances to deflect particles. Both types work by preventing ingress of foreign materials and egress of lubricants, ensuring smooth operation and longevity of linear bearings.
Materials
Common materials include nitrile rubber (NBR), polyurethane (PU), fluoroelastomer (FKM), and polytetrafluoroethylene (PTFE) for seals; stainless steel or aluminum for shields. Material selection depends on environmental factors like temperature, chemical exposure, and speed.
Technical Parameters
ParameterTypical rangeNotes & selection driver
IP RatingIP65/IP67
Seal TypeContact/Non-contact
Speed RatingUp to 5 m/s
Operating Temperature-40°C to 120°C
Lubricant CompatibilityGrease/Oil

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 10243, DIN 648

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Seal degradation from chemical exposure
  • Increased friction leading to overheating
  • Improper installation causing leaks
  • Contamination ingress due to seal failure
FMEA Triads
Trigger: Abrasive particles in environment
Failure: Seal wear and lubricant loss
Mitigation: Use high-durability materials like FKM and implement regular cleaning protocols
Trigger: High operating temperatures
Failure: Material hardening and cracking
Mitigation: Select temperature-resistant materials and ensure adequate cooling

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.1 mm for seal dimensions per ISO standards
Test Method
IP rating tests for ingress protection, accelerated life testing under simulated conditions

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Seals/Shields

Manufacturer profiles associated with Seals/Shields.

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Frequently Asked Questions

What is the difference between seals and shields in linear bearings?

Seals are typically contact-based components that physically block contaminants, while shields are non-contact with small clearances to deflect particles; seals offer better protection but may increase friction.

How often should seals be replaced in linear bearings?

Replacement intervals depend on operating conditions, but generally, inspect seals every 6-12 months and replace if signs of wear, cracking, or leakage are observed to prevent bearing damage.

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.

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