Rail/shaft: Diameter/Width 10-100 mm, Length 100-6000 mm

Component Specifications

Definition

A rail or shaft is a critical component in linear bearing/guide systems, providing a rigid, precisely machined pathway for linear motion. It ensures accurate positioning, minimal friction, and high load capacity in applications requiring straight-line movement, such as CNC machines, automation equipment, and 3D printers. The component typically features hardened surfaces, geometric accuracy, and mounting provisions for integration into machine frames.

Working Principle

Works by providing a smooth, hardened surface along which a bearing block or carriage slides or rolls, reducing friction through rolling elements (like balls or rollers) or sliding contact. It maintains alignment and distributes loads to enable precise linear translation with minimal deflection.

Materials

Typically made from high-carbon steel (e.g., AISI 1045, 1060) or stainless steel (e.g., 440C, 304), often hardened to 58-62 HRC for wear resistance. May include surface treatments like chrome plating or nitriding for corrosion protection and durability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	100-6000 mm
Hardness	58-62 HRC
Load Capacity	Dynamic: 5-50 kN, Static: 10-100 kN
Diameter/Width	10-100 mm
Surface Roughness	Ra ≤ 0.4 μm
Straightness Tolerance	≤0.01 mm/m

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 12090, DIN 645

Parent Products

This component is used in the following industrial products

Linear bearing/guides

Precision mechanical components that provide smooth, low-friction linear motion guidance in VCM actuators.

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Engineering Analysis

Risks & Mitigation

Wear and tear from friction
Misalignment causing binding
Corrosion in humid environments
Overloading leading to deformation

FMEA Triads

Trigger: Inadequate lubrication
Failure: Increased friction, overheating, and premature wear
Mitigation: Implement regular maintenance schedules with appropriate lubricants; use self-lubricating materials if needed.

Trigger: Improper installation or misalignment
Failure: Reduced accuracy, binding, and component damage
Mitigation: Follow manufacturer guidelines for mounting; use alignment tools and precision levels during installation.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Straightness tolerance ≤0.01 mm/m per ISO 12090; dimensional accuracy within ±0.005 mm

Test Method

Coordinate measuring machine (CMM) for geometric verification; hardness testing per Rockwell scale; load testing per ISO 14728

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 Rail/shaft

Manufacturer profiles associated with Rail/shaft.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a rail and a shaft in linear systems?

A rail is typically a profiled track (e.g., square or round) mounted to a surface, while a shaft is a cylindrical rod used as a guide. Rails often support higher loads and precision, whereas shafts are simpler for lighter applications.

How do I select the right rail/shaft for my application?

Consider load capacity, speed, accuracy requirements, environmental conditions (e.g., corrosion), and compatibility with bearing blocks. Refer to manufacturer catalogs and standards like ISO 12090 for specifications.

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.

Rail/shaft