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Linear Bearings/Sliders Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Linear bearings and sliders are mechanical components designed to facilitate precise linear movement along a fixed axis with minimal friction. They consist of a housing (slider) that contains rolling elements (balls or rollers) which move along a rail or shaft. These components are critical in guide systems for maintaining alignment, reducing wear, and ensuring accurate positioning in automated machinery and equipment.

Working Principle

Linear bearings operate on the principle of rolling contact, where balls or rollers circulate within a raceway to convert sliding friction into rolling friction. This reduces resistance and allows for smooth, controlled linear motion. The slider housing guides the movement along a rail, while preload adjustments minimize play and enhance rigidity.

Materials

Housings: Aluminum alloy, steel, or stainless steel; Rolling elements: Chrome steel, ceramic, or stainless steel balls; Seals: Rubber or polyurethane for contamination protection; Rails: Hardened steel or stainless steel with precision grinding.

Technical Parameters

Speed Up to 5 m/s
Lubrication Grease or oil, maintenance intervals: 500-2000 km
Load Capacity Dynamic: 500-5000 N, Static: 1000-10000 N
Repeatability ±0.01 mm to ±0.001 mm
Accuracy Grade Normal, Precision, High-Precision
Operating Temperature -20°C to 80°C

Standards

ISO 14728, DIN 645

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Linear Bearings/Sliders.

Parent Products

This component is used in the following industrial products

Guide System

A mechanical system within a continuous casting mold oscillator that precisely guides and stabilizes the mold's oscillatory motion along predetermined paths.

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Engineering Analysis

Risks & Mitigation

Contamination leading to increased friction and wear
Improper installation causing misalignment and reduced accuracy
Overloading beyond rated capacity resulting in premature failure
Inadequate lubrication causing overheating and seizing

FMEA Triads

Trigger: Contamination from dust, chips, or liquids
Failure: Increased friction, scoring of raceways, and eventual seizing
Mitigation: Use protective seals, implement regular cleaning schedules, and operate in controlled environments

Trigger: Misalignment during installation
Failure: Uneven load distribution, accelerated wear, and reduced positioning accuracy
Mitigation: Follow precise alignment procedures during assembly, use alignment tools, and verify with measurement instruments

Trigger: Overloading beyond specified limits
Failure: Plastic deformation of rolling elements or housing, leading to catastrophic failure
Mitigation: Design systems within load ratings, incorporate overload protection devices, and conduct regular load monitoring

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

ISO tolerance grades: IT5 to IT7 for precision applications, with runout tolerances as per ISO 1101

Test Method

Testing per ISO 14728 for load capacity, durability, and accuracy; vibration testing per ISO 10816; environmental testing for temperature and contamination resistance

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between linear ball bearings and linear roller bearings?

Linear ball bearings use balls for lower friction and higher speeds, ideal for light to medium loads. Linear roller bearings use cylindrical rollers for higher load capacity and rigidity, suitable for heavy-duty applications but with slightly higher friction.

How do I select the right linear bearing for my application?

Consider load capacity (dynamic and static), speed requirements, accuracy grade, environmental conditions (e.g., temperature, contamination), and compatibility with existing rails or shafts. Consult manufacturer datasheets and industry standards like ISO 14728.

What maintenance is required for linear bearings?

Regular lubrication every 500-2000 km of travel, inspection for wear or contamination, and cleaning of rails. Use recommended greases or oils, and replace seals if damaged to prevent debris ingress.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

Linear Bearings/Sliders