INDUSTRY COMPONENT

Rail Body

Rail Body is the stationary structural component of a linear guide rail system that provides precision guidance for moving carriages.

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Component Specifications

Definition
The Rail Body is the foundational structural element in a linear guide rail assembly, typically a hardened and ground steel bar with precisely machined raceways. It serves as the stationary reference surface along which recirculating ball or roller carriages travel, enabling smooth, low-friction linear motion with high accuracy, rigidity, and load capacity. Its geometric precision directly determines system performance in terms of straightness, parallelism, and positional repeatability.
Working Principle
The Rail Body operates on the principle of constrained linear motion through precision-ground raceways. These raceways guide rolling elements (balls or rollers) within the carriage, minimizing friction and converting rotational drive forces into precise linear displacement. The rail's rigidity prevents deflection under load, maintaining alignment and ensuring accurate motion transfer along its entire length.
Materials
Typically made from high-carbon chromium bearing steel (e.g., SUJ2, AISI 52100) or case-hardened steel, hardened to 58-62 HRC. Stainless steel (e.g., SUS440C) versions are available for corrosive environments. Surface treatments may include black oxide coating or chrome plating for corrosion resistance.
Technical Parameters
  • Width 15-100mm
  • Height 15-60mm
  • Length Standard: 500-4000mm, Custom: up to 6000mm
  • Precision Grade Normal (N), High (H), Precision (P), Ultra-Precision (UP)
  • Raceway Hardness 58-62 HRC
  • Surface Roughness Ra 0.4μm max
  • Parallelism Tolerance ≤5μm
  • Straightness Tolerance ≤3μm/100mm
Standards
ISO 14728-1, DIN 645, JIS B 1192

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rail Body.

linear guide rail body precision rail hardened steel guide linear motion component machine tool rail industrial automation guide Rail Body Rail Body in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Guide Rail

A precision mechanical component that provides smooth, low-friction linear motion along a fixed path.

View Product Details

Positioning Guide Rails

Linear guidance components that ensure precise alignment and movement of machine parts along a defined path.

View Product Details

Alignment Guide Rails

Precision linear guidance components that ensure proper alignment and smooth movement of carriage systems.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Misalignment during installation
  • Corrosion in humid environments
  • Fatigue failure under cyclic loads
  • Contamination of raceways
  • Thermal expansion mismatch with base material
FMEA Triads
Trigger: Improper mounting surface flatness
Failure: Reduced accuracy, premature wear, increased friction
Mitigation: Verify surface flatness (<0.01mm/100mm), use alignment tools, apply proper mounting torque sequence
Trigger: Inadequate lubrication
Failure: Increased friction, overheating, scoring of raceways
Mitigation: Follow manufacturer's lubrication schedule, use compatible greases, implement automatic lubrication systems
Trigger: Contaminant ingress
Failure: Abrasive wear, pitting, reduced lifespan
Mitigation: Install protective covers or bellows, maintain clean environment, use sealed carriage designs

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Straightness: ≤0.003mm/100mm (P grade), Parallelism: ≤0.005mm, Height variation: ≤0.005mm
Test Method
Coordinate measuring machine (CMM) verification, laser interferometry for straightness, surface profilometry for roughness, Rockwell hardness testing

Buyer Feedback

★★★★☆ 4.7 / 5.0 (11 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Rail Body meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Rail Body arrived with full certification."

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Frequently Asked Questions

What is the difference between rail body precision grades?

Precision grades (N, H, P, UP) indicate manufacturing tolerances for straightness, parallelism, and surface finish. Higher grades (P, UP) offer better accuracy for精密 applications like semiconductor manufacturing or metrology equipment.

Can rail bodies be customized for specific applications?

Yes, manufacturers offer custom lengths, hole patterns, special materials (stainless steel), and coatings. Some provide pre-drilled mounting holes or integrated sensor tracks for position feedback systems.

How do you properly install a rail body?

Installation requires a flat, rigid mounting surface with proper alignment using precision levels or laser alignment tools. Bolts should be tightened in a cross pattern to specified torque values to prevent distortion. Parallel installation of multiple rails requires careful measurement to maintain consistent spacing.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Rail Rail Mounting Surface