Industry-Verified Manufacturing Data (2026)

Linear Bearing

Based on aggregated insights from multiple verified 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
    Provides structural support, contains the rolling elements, and often features mounting holes.
    Material: Steel or Aluminum Alloy
  • Inner Raceway / Retainer
    Guides and retains the rolling elements (balls/rollers) in their path.
    Material: Steel or Engineering Plastic
  • Rolling Elements (Balls/Rollers)
    Provide the rolling contact between the bearing and the guide rod, minimizing friction.
    Material: Chrome Steel or Ceramic
  • Seals / Shields
    Protect the internal components from contamination (dust, chips) and retain lubrication.
    Material: Rubber or Synthetic Polymer
Engineering Reasoning
0-150°C temperature, 0-1000 N load, 0-2 m/s velocity
Ball deformation at 1200 MPa contact stress, cage fracture at 200°C glass transition temperature, lubricant breakdown at 180°C
Design Rationale: Hertzian contact stress exceeding ball material yield strength (SAE 52100 steel: 1900 MPa ultimate), polymer cage thermal expansion exceeding dimensional tolerances (PEEK: 47×10⁻⁶/°C CTE), lubricant oxidation at Arrhenius reaction rate doubling per 10°C rise
Risk Mitigation (FMEA)
Trigger Contaminant particle (≥10 μm) ingress into ball-raceway interface
Mode: Brinnelling damage with 0.1 mm permanent indentation, 15 dB vibration increase at 500 Hz
Strategy: Triple-lip contact seals with 0.5 μm filtration, positive-pressure purge system at 0.1 bar
Trigger Misalignment exceeding 0.1° per 100 mm length
Mode: Edge loading with 300% stress concentration, retainer fracture at 10⁷ cycles
Strategy: Self-aligning housing with ±2° adjustment, laser alignment verification to 0.01 mm/m

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
View system integration details

Industrial Ecosystem & Supply Chain DNA

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

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

P Procurement Specialist from United Arab Emirates Jan 19, 2026
★★★★★
"Testing the Linear Bearing now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
T Technical Director from Australia Jan 16, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
P Project Engineer from Singapore Jan 13, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Linear Bearing meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

6 sourcing managers are analyzing this specification now. Last inquiry for Linear Bearing from USA (22m ago).

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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 Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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