Inner Raceway / Retainer: Temperature Range -30°C to +120°C

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

Parameter	Typical range	Notes & selection driver
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

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 14728, DIN 636

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

Typical Suppliers & Equivalents

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

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Inner Raceway / Retainer

Manufacturer profiles associated with Inner Raceway / Retainer.

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Related Components

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

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.

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.

Inner Raceway / Retainer