Bearing Rails for Linear Guidance

Product Specifications

Technical details and manufacturing context for Bearing Rails

Definition

Bearing rails are precision-engineered linear guide components integrated into carriage beam systems. They serve as the primary load-bearing and guidance interface, enabling smooth, low-friction linear motion of carriages, sliders, or other moving assemblies while maintaining precise alignment and distributing operational loads across the beam structure. These rails are manufactured from carbon steel, alloy steel, or stainless steel, with material grades such as GCr15 (per GB/T 18254) available. They are typically induction hardened to a hardness of 58–62 HRC (per ISO 683-17) to resist wear. Key dimensional parameters include rail width (15–60 mm), rail height (20–45 mm), and rail length (500–6000 mm), with custom lengths available. Mounting hole pitch ranges from 60–120 mm, and weight per meter is 3–15 kg/m. Performance specifications include dynamic load capacity (10–120 kN) and static load capacity (20–200 kN) per ISO 14728-1, as well as straightness (0.005–0.02 mm/m) and parallelism (0.01–0.03 mm/m) per ISO 1101. Operating temperature range is -40 to 85°C. These rails are designed to work with bearing blocks or carriages that contain rolling or sliding elements, ensuring precise motion and load distribution. For any specific application, it is essential to verify model-specific values and standards with the legal manufacturer or supplier, as the listed ranges are reference values and may vary by product configuration.

Working Principle

Bearing rails operate by providing a hardened, precision-ground surface along which bearing elements (such as ball bearings, roller bearings, or sliding pads) travel. The rails maintain geometric accuracy and surface finish to minimize friction and wear, while their structural design ensures load distribution to prevent deformation under operational stresses. They work in conjunction with bearing blocks or carriages that contain the rolling/sliding elements. The rail's profile and mounting hole pattern allow secure attachment to the carriage beam, and the hardness and surface finish are critical for long service life. Proper lubrication and alignment are necessary to achieve the specified performance.

Common Materials

Carbon steel, Alloy steel, Stainless steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rail Width	15–60 mm	Determines load capacity and compatibility with carriage.
Rail Height	20–45 mm	Affects rigidity and mounting space.
Rail Length	500–6000 mm	Custom lengths available; longer rails require more supports.
Dynamic Load Capacity	10–120 kN	Maximum allowable load under dynamic conditions.ISO 14728-1
Static Load Capacity	20–200 kN	Maximum load without permanent deformation.ISO 14728-1
Straightness	0.005–0.02 mm/m	Critical for precision applications.ISO 1101
Parallelism	0.01–0.03 mm/m	Ensures smooth motion and even load distribution.ISO 1101
Hardness	58–62 HRC	Induction hardened to resist wear.ISO 683-17
Material Grade	GCr15	Bearing steel; other grades available on request.GB/T 18254
Operating Temperature	-40–85 °C	Outside this range, lubrication and material properties degrade.
Mounting Hole Pitch	60–120 mm	Standard pitch; custom pitch available.
Weight per Meter	3–15 kg/m	Affects handling and structural support requirements.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Rail body Part
Primary structural element providing the guiding surface and load-bearing capacity

Material: Hardened steel
Reference edge Part
Precision-ground surface used for alignment during installation

Material: Same as rail body

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bearing Rails.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Carriage Beam

View system integration details

Manufacturers of Bearing Rails

Manufacturer profiles associated with Bearing Rails.

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Frequently Asked Questions

What materials are bearing rails available in?

Bearing rails are available in carbon steel, alloy steel, and stainless steel. Material grade GCr15 is listed as a standard option, but other grades may be available on request. Always confirm the specific material grade with the manufacturer for your application.

What is the typical hardness of bearing rails?

The listed hardness range is 58–62 HRC, achieved through induction hardening, per ISO 683-17. This hardness provides wear resistance. However, the exact hardness may vary depending on the material and manufacturing process, so verify with the supplier.

How do I determine the correct rail size for my application?

Key parameters include rail width (15–60 mm), height (20–45 mm), and length (500–6000 mm). Load capacities (dynamic 10–120 kN, static 20–200 kN) and straightness/parallelism tolerances are also critical. These values are reference ranges; you must consult the manufacturer to ensure the selected rail meets your specific load and precision requirements.

What standards apply to bearing rails?

The listed standards include ISO 14728-1 for load capacities, ISO 1101 for geometric tolerances, ISO 683-17 for hardness, and GB/T 18254 for material grade. These standards serve as verification references, but they do not guarantee that a specific product is certified. Always request documentation from the supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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pressure:	Up to 50 MPa static load capacity
other spec:	Max linear speed: 5 m/s, Max acceleration: 50 m/s²
temperature:	-40°C to 120°C

Bearing Rails

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards