Structured Manufacturing Data (2026)

Linear Bearing

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Linear Bearing used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Linear Bearing is characterized by the integration of Outer Housing and Inner Raceway / Retainer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Chrome Steel (GCR15) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A precision mechanical component that provides low-friction linear motion along a guide rod or shaft.

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Product Specifications

Technical details and manufacturing context for Linear Bearing

Definition
A linear bearing is a critical component within a Guide Rod/Bearing Assembly that enables smooth, precise, and low-friction linear movement of a carriage or slide along a fixed guide rod or shaft. It constrains motion to a single axis while supporting radial loads.
Working Principle
It operates by using rolling elements (such as balls or rollers) contained within a housing. These elements circulate between the bearing's inner raceway and the outer surface of the guide rod, converting sliding friction into rolling friction to achieve smooth linear motion.
Common Materials
Chrome Steel (GCR15), Stainless Steel (e.g., 440C, SUS304)
Technical Parameters
  • The inner diameter (bore size) that matches the diameter of the guide rod. (mm) Per Request
Components / BOM
  • Outer Housing Part
    Provides structural support, contains the rolling elements, and often features mounting holes.
    Material: Steel or Aluminum Alloy
  • Inner Raceway / Retainer Part
    Guides and retains the rolling elements (balls/rollers) in their path.
    Material: Steel or Engineering Plastic
  • Rolling Elements (Balls/Rollers) Part
    Provide the rolling contact between the bearing and the guide rod, minimizing friction.
    Material: Chrome Steel or Ceramic
  • Seals / Shields Part
    Protect the internal components from contamination (dust, chips) and retain lubrication.
    Material: Rubber or Synthetic Polymer

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Linear Bearing.

chrome steel linear bearing for machinery stainless steel linear bearing guide rod low friction linear motion bearing precision linear bearing with seals linear bearing BOM inner raceway

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Guide Rod/Bearing Assembly
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Max 10 MPa (100 bar) radial load, 5 MPa axial load
other spec: Max velocity: 2 m/s, lubrication required for continuous operation
temperature: -20°C to +80°C (standard), up to +150°C with special materials
Media Compatibility
✓ Clean air environments ✓ Industrial machinery with oil lubrication ✓ Precision positioning systems
Unsuitable: Abrasive particulate environments without protective seals
Sizing Data Required
  • Shaft diameter (mm)
  • Maximum load capacity (N)
  • Required travel length (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wear and Scoring
Cause: Contamination ingress (dust, debris) or inadequate lubrication leading to abrasive damage on raceways and rolling elements.
Corrosion and Pitting
Cause: Exposure to moisture, corrosive chemicals, or improper material selection for the operating environment.
Maintenance Indicators
  • Increased friction or stick-slip motion during operation
  • Abnormal noise (grinding, scraping) or visible scoring on bearing surfaces
Engineering Tips
  • Implement strict contamination control with proper seals/wipers and regular cleaning of guide rails
  • Follow manufacturer's lubrication schedule using compatible lubricants and maintain proper alignment during installation

Compliance & Manufacturing Standards

Reference Standards
ISO 10285:2011 - Linear motion rolling bearings ANSI/ABMA 12.2 - Load ratings and fatigue life for ball bearings DIN 636:2014 - Linear ball bearings and shaft assemblies
Manufacturing Precision
  • Bore diameter tolerance: H7 (e.g., 20mm bore: +0.021/0 mm)
  • Running parallelism: ≤0.01mm per 100mm length
Quality Inspection
  • Dimensional accuracy verification using CMM (Coordinate Measuring Machine)
  • Hardness testing (Rockwell C scale) for bearing components

Factories Producing Linear Bearing

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 are the main materials used in linear bearings?

Linear bearings are typically made from Chrome Steel (GCR15) for high load capacity or Stainless Steel (e.g., 440C, SUS304) for corrosion resistance in harsh environments.

What components make up a linear bearing's BOM?

The bill of materials includes: Inner Raceway/Retainer, Outer Housing, Rolling Elements (Balls/Rollers), and Seals/Shields for protection against contaminants.

How do linear bearings provide low-friction motion?

Linear bearings use precision rolling elements (balls or rollers) between inner and outer components to minimize friction along guide rods or shafts, enabling smooth linear movement in machinery.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

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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