INDUSTRY COMPONENT

Ball or Roller Bearings

Precision rolling elements that reduce friction and support loads in linear guide systems for smooth, accurate motion.

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Component Specifications

Definition
Ball or roller bearings are critical components in linear guide and bearing systems that facilitate precise linear motion by converting sliding friction into rolling friction. They consist of hardened steel balls or cylindrical rollers contained within raceways, enabling smooth movement with minimal resistance while supporting radial, axial, and moment loads in industrial machinery.
Working Principle
Operates on rolling contact mechanics where balls or rollers rotate between inner and outer raceways, distributing loads across multiple contact points to minimize friction, wear, and energy loss during linear motion.
Materials
Typically made from high-carbon chromium steel (AISI 52100/SUJ2) or stainless steel (AISI 440C) with hardness of 58-65 HRC; ceramic (Si3N4) variants for high-speed or corrosive environments; cages from steel, brass, or polymers.
Technical Parameters
  • Lubrication Grease (NLGI 2) or oil (ISO VG 32-68)
  • Speed Limit Up to 50 m/s for balls, 30 m/s for rollers
  • Load Capacity Dynamic: 5-50 kN, Static: 10-100 kN
  • Precision Grade ABEC 1-9 (ISO P0-P2)
  • Operating Temperature -30°C to +120°C (standard), up to +200°C (special)
Standards
ISO 14728, DIN 636

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ball or Roller Bearings.

linear bearing ball bearing roller bearing linear guide system precision motion industrial components load capacity friction reduction Ball or Roller Bearings Ball or Roller Bearings in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Guide / Bearing System

A precision mechanical system that provides smooth, low-friction linear motion along a defined axis.

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Engineering Analysis

Risks & Mitigation
  • Contamination leading to premature wear
  • Improper installation causing misalignment
  • Overloading beyond rated capacity
  • Inadequate lubrication increasing friction
FMEA Triads
Trigger: Contaminant ingress (dust, chips)
Failure: Increased friction, pitting, and eventual seizure
Mitigation: Use seals or shields; implement regular cleaning protocols
Trigger: Misalignment during installation
Failure: Uneven load distribution and accelerated wear
Mitigation: Follow alignment procedures; use precision mounting tools

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Radial runout: ≤0.005 mm for precision grades; axial clearance: 0.002-0.020 mm
Test Method
ISO 14728-2 for dynamic load testing; DIN 636 for dimensional accuracy verification

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 difference between ball and roller bearings in linear guides?

Ball bearings offer lower friction and higher speed capability, ideal for precision applications; roller bearings provide higher load capacity and rigidity, suitable for heavy-duty machinery.

How often should linear bearings be lubricated?

Lubrication intervals depend on operating conditions: typically every 3-6 months for standard environments, or based on manufacturer's guidelines (e.g., after 100 km of travel).

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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