INDUSTRY COMPONENT

Bore / Raceway

Precision-machined cylindrical bore and raceway surfaces in linear guides and bearing housings that enable smooth, low-friction linear motion.

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Component Specifications

Definition
The bore/raceway is a critical precision-engineered component within linear guides and bearing housings, consisting of precisely machined cylindrical surfaces that serve as the contact interface for rolling elements (balls or rollers). These surfaces are designed with specific geometric tolerances, surface finishes, and hardness characteristics to minimize friction, distribute loads evenly, and maintain alignment during linear motion. The bore provides the mounting surface for the shaft or rail, while the raceway guides the rolling elements along a controlled path, ensuring consistent motion accuracy and load capacity.
Working Principle
The bore/raceway operates on the principle of rolling contact mechanics, where precision-ground surfaces reduce sliding friction by allowing rolling elements to travel along a defined path. The geometry of the raceway controls the contact angle and preload, optimizing load distribution and minimizing deformation under operational stresses. This design converts rotational or linear input into smooth, guided linear motion with minimal energy loss.
Materials
Typically made from high-carbon chromium bearing steel (e.g., AISI 52100/SUJ2), case-hardened steel (e.g., AISI 8620), or stainless steel (e.g., AISI 440C). Surface hardness ranges from 58-64 HRC, with core toughness maintained at 30-45 HRC. Optional coatings include black oxide, zinc-nickel plating, or titanium nitride for corrosion resistance and reduced wear.
Technical Parameters
  • Hardness 58-64 HRC
  • Temperature Range -30°C to +120°C
  • Roundness Tolerance ≤ 0.005 mm
  • Straightness Tolerance ≤ 0.01 mm/m
  • Bore Diameter Tolerance H6/H7 (ISO)
  • Load Capacity (Dynamic) 10-50 kN (varies by size)
  • Raceway Surface Roughness Ra 0.2-0.4 μm
Standards
ISO 14728, DIN 645, JIS B 1192

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bore / Raceway.

linear guide bore bearing raceway precision machining rolling contact surfaces linear motion components industrial bearings ISO 14728 Bore / Raceway Bore / Raceway in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Guide / Bearing Housing

A structural component that houses and supports linear bearings or guide rails, providing precise linear motion guidance within mechanical systems.

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Engineering Analysis

Risks & Mitigation
  • Surface wear from contamination
  • Corrosion in humid environments
  • Geometric deformation under overload
  • Misalignment during installation
FMEA Triads
Trigger: Contaminant ingress (dust, chips)
Failure: Abrasive wear on raceway surfaces, increased friction, reduced accuracy
Mitigation: Install seals or wipers, use closed housings, implement regular cleaning protocols
Trigger: Improper lubrication
Failure: Increased friction, overheating, premature wear or seizure
Mitigation: Follow manufacturer lubrication intervals, use compatible greases, monitor temperature
Trigger: Excessive load or shock
Failure: Raceway brinelling, permanent deformation, loss of precision
Mitigation: Design within load ratings, use shock absorbers, implement load monitoring systems

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Geometric tolerances per ISO 1101:2017; bore diameter tolerance H6/H7 per ISO 286-2
Test Method
Coordinate measuring machine (CMM) for geometry; surface roughness tester per ISO 4287; hardness testing per ISO 6508-1; load testing per ISO 14728

Buyer Feedback

★★★★☆ 4.7 / 5.0 (13 reviews)

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

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

"Found 41+ suppliers for Bore / Raceway on CNFX, but this spec remains the most cost-effective."

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Frequently Asked Questions

What is the difference between bore and raceway in linear guides?

The bore is the cylindrical mounting surface for the shaft or rail, ensuring proper fit and alignment. The raceway is the precisely ground track where rolling elements (balls/rollers) travel, controlling motion path and load distribution.

How does raceway geometry affect linear guide performance?

Raceway geometry (e.g., Gothic arch or circular arc) determines contact angle, load distribution, and stiffness. Optimal geometry reduces stress concentration, minimizes friction, and enhances accuracy and lifespan.

What maintenance is required for bore/raceway components?

Regular cleaning to remove contaminants, lubrication with appropriate greases (e.g., lithium-based), and inspection for wear, pitting, or corrosion. Avoid abrasive cleaners and ensure proper alignment during installation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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