Editorial Technical Reference

Motion Guide / Bearing

This page explains how Motion Guide / Bearing is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical component that provides precise linear or rotational guidance and reduces friction between moving parts in sorting mechanisms.

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Product Specifications

Technical details and manufacturing context for Motion Guide / Bearing

Definition
This component is a critical part of sorting mechanisms such as robotic arms and diverter gates. It enables smooth, accurate, and low-friction motion by combining guide rails, bearing elements (balls or rollers), and mounting blocks. These elements work together to constrain movement along a defined path while supporting loads and minimizing wear. The component is available in materials including chrome steel, stainless steel, and carbon steel, with material grade GCr15 as a common bearing steel option. Key parameters include dynamic load rating (5–50 kN), static load rating (10–80 kN), travel accuracy (±0.005–±0.02 mm), repeatability (±0.002–±0.01 mm), max speed (2–10 m/s), operating temperature (-20–80 °C), vibration amplitude (0.5–2.5 mm/s), noise level (40–60 dB(A)), lubrication type (grease), and weight (0.5–10 kg). These values are reference ranges and must be confirmed for the specific model and application. Standards such as ISO 14728-1, ISO 14728-2, ISO 230-2, ISO 10816-1, ISO 3744, ISO 6743-9, and GB/T 18254 are listed as procurement and verification references, not as proof of certification or compliance. The component is designed for sorting applications requiring high precision and repeatable positioning. Selection should consider load, speed, accuracy, and environmental conditions. Verification with the manufacturer is essential to ensure the chosen variant meets the required specifications. Maintenance signals include increased noise, vibration, or reduced accuracy, indicating potential wear or lubrication issues. Failure boundaries include exceeding load ratings or operating outside temperature limits, which can lead to permanent deformation or premature failure.
Working Principle
The component converts sliding friction into rolling friction by using rolling elements (balls or rollers) between precision-ground guide rails and bearing blocks. This allows for smooth linear or rotational motion with minimal resistance, high precision, and repeatable positioning. The rolling elements distribute loads and reduce wear, enabling consistent performance in sorting applications. The design supports both linear and rotational movements, depending on the configuration. Proper lubrication is essential to maintain low friction and prevent overheating. The operating principle is based on the mechanical advantage of rolling contact, which reduces energy loss and enhances accuracy.
Common Materials
Chrome steel, Stainless steel, Carbon steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Dynamic Load Rating5–50 kNDetermines bearing life under loadISO 14728-1
Static Load Rating10–80 kNMaximum load without permanent deformationISO 14728-1
Travel Accuracy±0.005–±0.02 mmHigher precision for high-speed sortingISO 14728-2
Repeatability±0.002–±0.01 mmCritical for consistent sortingISO 230-2
Max Speed2–10 m/sLimited by lubrication and heat
Operating Temperature-20–80 °COutside range may affect lubricationISO 14728-1
Vibration Amplitude0.5–2.5 mm/sExcessive vibration reduces accuracyISO 10816-1
Noise Level40–60 dB(A)Lower noise for indoor environmentsISO 3744
Lubrication TypeGreaseGrease or oil; affects maintenanceISO 6743-9
Material GradeGCr15Bearing steel; stainless availableGB/T 18254
Weight0.5–10 kgDepends on size and type

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
  • Guide rail Part
    Provides the precision track for linear motion, typically hardened and ground for durability
    Material: Chrome steel
  • Bearing block/slider
    Houses the rolling elements and attaches to the moving part, contains recirculating ball or roller system
    Material: Carbon steel
  • Rolling elements Part
    Balls or rollers that reduce friction between rail and block
    Material: Chrome steel
  • End seals Part
    Protect the internal components from contamination and retain lubrication
    Material: Rubber or polyurethane

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Motion Guide / Bearing.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 50 MPa static, 20 MPa dynamic
other spec: Max velocity: 5 m/s, Load capacity: 10 kN
temperature: -40°C to +120°C
Media Compatibility
✓ Clean air systems ✓ Lubricated metal surfaces ✓ Dry polymer components
Unsuitable: Abrasive slurry environments with >5% solids concentration
Sizing Data Required
  • Maximum load (radial/axial)
  • Required travel length/stroke
  • Operating speed and acceleration profile

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Surface fatigue (spalling)
Cause: Repeated cyclic loading beyond material endurance limit, often due to misalignment, overloading, or inadequate lubrication leading to subsurface crack propagation and material flaking.
Corrosion and contamination wear
Cause: Ingress of moisture, corrosive chemicals, or particulate contaminants (dust, metal chips) into bearing surfaces, typically from failed seals, improper storage, or operating in harsh environments without adequate protection.
Maintenance Indicators
  • Abnormal audible grinding or clicking noises during operation indicating internal damage or contamination
  • Excessive heat generation (beyond normal operating temperature range) detected by thermal imaging or touch, signaling lubrication failure or overload
Engineering Tips
  • Implement precision alignment during installation using laser alignment tools and maintain proper preload to prevent edge loading and uneven stress distribution
  • Establish condition-based monitoring with vibration analysis and lubricant sampling to detect early degradation signs before catastrophic failure occurs

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 14728-1:2004 (Rolling bearings - Linear motion rolling bearings) ANSI/ABMA 9:1990 (Load Ratings and Fatigue Life for Ball Bearings) DIN 636:2017 (Linear ball bearings and shaft assemblies)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter tolerance: H7 (e.g., 20mm bore: +0.021/0 mm)
  • Running parallelism: ≤0.02mm/100mm travel
Quality Inspection
  • Dimensional verification with CMM (Coordinate Measuring Machine)
  • Hardness testing (Rockwell C scale) for bearing components

Manufacturers of Motion Guide / Bearing

Manufacturer profiles associated with Motion Guide / Bearing.

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Frequently Asked Questions

What materials are available for this motion guide/bearing?

The component is available in chrome steel, stainless steel, and carbon steel. The material grade GCr15 is a common bearing steel option, but stainless steel variants may be available for corrosion resistance. Confirm the exact material and grade with the manufacturer for your application.

What is the dynamic load rating range?

The dynamic load rating is listed as 5–50 kN, according to ISO 14728-1. This range indicates the bearing life under load. The actual value depends on the specific model and size, so verify with the manufacturer.

How does travel accuracy affect sorting performance?

Travel accuracy is ±0.005–±0.02 mm, per ISO 14728-2. Higher precision is recommended for high-speed sorting to ensure consistent positioning. The required accuracy depends on the sorting application's tolerance, so confirm the needed value with the manufacturer.

What maintenance signals indicate potential issues?

Increased noise, vibration, or reduced accuracy can indicate wear, insufficient lubrication, or contamination. Regular inspection and proper lubrication (grease type per ISO 6743-9) are essential. If these signals appear, check the component and consult the manufacturer for service or replacement.

Data Basis

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

Preliminary Technical Classification
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