Seals / Wipers (if present): Hardness (Shore A) 70-90

Component Specifications

Definition

Seals and wipers are critical protective components in linear guide and bearing housing systems, designed to exclude contaminants (dust, chips, liquids) and retain lubricants within the bearing track. They form a physical barrier between the moving carriage/block and the external environment, significantly extending component life and maintaining precision by preventing abrasive wear and corrosion.

Working Principle

These components operate on the principle of creating a controlled interference fit or contact seal. Wipers (or scrapers) use a flexible lip or blade to physically scrape off contaminants from the guide rail as the carriage moves. Seals (often labyrinth or lip seals) create a tortuous path or direct contact barrier to block ingress of fine particles and fluids while containing grease or oil within the housing.

Materials

Common materials include Nitrile Rubber (NBR) for general oil resistance, Polyurethane (PU) for high abrasion resistance, Fluorocarbon Rubber (FKM/Viton) for chemical and high-temperature environments, and PTFE-impregnated fabrics for low friction and dry running. Some designs incorporate metal reinforcements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mounting	Integrated into end caps or carriage blocks, press-fit, or adhesive-backed
Seal Type	Lip Seal, Labyrinth Seal, Wiper Scraper
Hardness (Shore A)	70-90
Operating Temperature Range	-30°C to +120°C (varies by material)

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 6194, DIN 3760, DIN 3761

Parent Products

This component is used in the following industrial products

Linear Guide / Bearing Housing

A structural component that houses and supports linear bearings or guide rails, providing precise linear motion guidance within mechanical systems.

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Engineering Analysis

Risks & Mitigation

Seal degradation from incompatible chemicals
Increased friction and wear from hardened seals
System contamination leading to premature bearing failure
Lubricant washout leading to dry running and seizure

FMEA Triads

Trigger: Material incompatibility with process chemicals or extreme temperatures.
Failure: Seal hardening, cracking, or swelling, loss of sealing force.
Mitigation: Select material (e.g., FKM) based on a full chemical and thermal analysis of the operating environment. Implement regular inspection schedules.

Trigger: Abrasive contamination overwhelming the wiper's capacity.
Failure: Contaminant ingress, abrasive wear on guide rails and bearing balls/rollers.
Mitigation: Use multi-stage sealing (wiper + labyrinth seal), implement external chip guards or bellows, and establish a rigorous cleaning regimen around the guide.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per manufacturer drawings, typically IT7-IT9 for critical sealing surfaces. Interference fit for press-in seals must be controlled to prevent damage during assembly.

Test Method

Performance testing per ISO 6194 for rotary shaft seals (principles apply). In practice, tested via dust/water ingress tests (IP ratings), grease retention tests under load and cycle counts, and material verification against MSDS/Certificates of Analysis.

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 Seals / Wipers (if present)

Manufacturer profiles associated with Seals / Wipers (if present).

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Frequently Asked Questions

What is the difference between a seal and a wiper in a linear guide system?

A wiper (or scraper) is primarily designed to remove large, solid contaminants (like chips or dust) from the guide rail surface before they enter the system. A seal is designed to block the ingress of fine particles and liquids and to retain lubrication inside the bearing track. Many systems use both in combination.

How often should seals and wipers be replaced?

Replacement is condition-based, not time-based. Inspect regularly for signs of hardening, cracking, tearing, or permanent deformation. Typical service life ranges from 6 months to several years depending on the operating environment (cleanroom vs. abrasive machining), cycle speed, and material.

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.

Seals / Wipers (if present)