INDUSTRY COMPONENT

Inner Raceway / Retainer

Precision inner raceway and retainer assembly for linear bearings, enabling smooth linear motion with minimal friction.

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Component Specifications

Definition
The inner raceway/retainer is a critical component of linear bearings, consisting of a hardened steel raceway with precisely machined grooves that guide rolling elements (typically balls or rollers) and a retainer that maintains proper spacing and alignment between these elements. This assembly ensures consistent load distribution, reduces friction, and provides accurate linear guidance in industrial machinery.
Working Principle
The inner raceway provides a smooth, hardened surface for rolling elements to travel along, while the retainer separates and spaces these elements to prevent contact and ensure even distribution. Together, they convert rotational motion of the rolling elements into precise linear motion with minimal energy loss through rolling friction.
Materials
High-carbon chromium steel (e.g., AISI 52100/SUJ2), case-hardened to 58-62 HRC; retainers made from steel, brass, or engineered polymers (POM, PA66) for corrosion resistance and low friction.
Technical Parameters
  • Load Capacity Dynamic: 5-50 kN, Static: 10-100 kN
  • Raceway Hardness 58-62 HRC
  • Surface Roughness Ra ≤ 0.2 μm
  • Temperature Range -30°C to +120°C
  • Diameter Tolerance ISO h6/h7
  • Retainer Clearance 0.05-0.15 mm
Standards
ISO 14728, DIN 636

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inner Raceway / Retainer.

linear bearing inner raceway retainer assembly precision linear motion ball bearing raceway industrial automation components CNC machine parts low friction guide Inner Raceway / Retainer Inner Raceway / Retainer in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Bearing

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

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Engineering Analysis

Risks & Mitigation
  • Premature wear due to contamination
  • Corrosion in humid environments
  • Misalignment causing uneven load distribution
  • Retainer fracture under excessive vibration
FMEA Triads
Trigger: Contaminant ingress (dust, chips)
Failure: Abrasive wear on raceway surface
Mitigation: Install proper seals, implement regular cleaning protocols, use protective covers
Trigger: Improper lubrication
Failure: Increased friction and overheating
Mitigation: Follow manufacturer's lubrication schedule, use compatible greases, monitor temperature
Trigger: Excessive preload or misalignment
Failure: Premature fatigue and brinelling
Mitigation: Proper installation alignment, correct preload adjustment, use alignment tools

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 286-1:2010 for dimensional tolerances, ISO 1101:2017 for geometric tolerances
Test Method
Coordinate measuring machine (CMM) verification, surface roughness testing per ISO 4287, hardness testing per ISO 6508

Buyer Feedback

★★★★☆ 4.7 / 5.0 (23 reviews)

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Inner Raceway / Retainer arrived with full certification."

"Great transparency on the Inner Raceway / Retainer components. Essential for our Machinery and Equipment Manufacturing supply chain."

"The Inner Raceway / Retainer we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

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Frequently Asked Questions

What is the difference between inner raceway and retainer in linear bearings?

The inner raceway is the hardened track where rolling elements move, providing the load-bearing surface, while the retainer is a cage-like structure that separates and spaces the rolling elements to prevent contact and ensure smooth operation.

How often should linear bearing raceways be inspected?

Inspect every 3-6 months under normal operation, or more frequently in high-load/dirty environments. Look for wear patterns, pitting, or corrosion that could affect performance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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