Linear Ball/Roller Bearings: Speed Up to 5 m/s

Component Specifications

Definition

Linear ball/roller bearings are mechanical components designed to provide linear motion along a shaft or rail with minimal friction. They consist of recirculating ball or roller elements housed within a carriage that moves along a hardened steel shaft or rail. These bearings support high loads while maintaining precise positioning accuracy, making them essential for CNC machines, automation systems, robotics, and precision manufacturing equipment where repeatable linear movement is required.

Working Principle

Linear ball bearings operate on the principle of recirculating rolling elements (balls or rollers) that circulate within a closed loop inside the bearing housing. As the bearing moves along the shaft, the balls/rollers rotate, reducing sliding friction to near-zero levels. Linear roller bearings use cylindrical rollers instead of balls, providing higher load capacity and rigidity. Both types maintain consistent contact with the raceway through precision-ground surfaces, ensuring smooth motion and accurate positioning.

Materials

Bearing housing: Carbon steel (S45C), stainless steel (SUS440C, SUS304). Rolling elements: Chrome steel (GCR15), ceramic (Si3N4). Retainers: Polyamide (PA66), stainless steel. Seals: Nitrile rubber (NBR), fluoroelastomer (FKM).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Speed	Up to 5 m/s
Precision	±0.005 mm positioning accuracy
Lubrication	Grease (Aluminum complex, Lithium-based), Oil (ISO VG32-68)
Load Capacity	Dynamic: 500-20,000 N, Static: 800-30,000 N
Accuracy Grade	P0 (Normal), P5 (High), P7 (Ultra-high)
Operating Temperature	-30°C to +120°C

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 10285, DIN 636, JIS B 1539

Parent Products

This component is used in the following industrial products

Bearing block/slider

A housing unit that contains and supports linear bearings, enabling smooth linear motion along a guide rail.

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Engineering Analysis

Risks & Mitigation

Contamination leading to premature wear
Improper installation causing misalignment
Inadequate lubrication resulting in overheating
Overloading beyond rated capacity
Corrosion in humid environments

FMEA Triads

Trigger: Contamination from dust, chips, or liquids
Failure: Increased friction, scoring of raceways, premature wear
Mitigation: Install proper seals, implement regular cleaning protocols, use protective covers

Trigger: Misalignment during installation
Failure: Uneven load distribution, reduced accuracy, accelerated wear
Mitigation: Use precision alignment tools, follow installation torque specifications, verify parallelism

Trigger: Inadequate or incorrect lubrication
Failure: Metal-to-metal contact, overheating, seizure
Mitigation: Follow lubrication schedules, use recommended lubricants, monitor temperature

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 286-1:2010 tolerance classes (IT5-IT7), DIN 7172 form and position tolerances

Test Method

ISO 14728-1:2017 load testing, DIN 636 dimensional verification, vibration analysis per ISO 10816

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 Linear Ball/Roller Bearings

Manufacturer profiles associated with Linear Ball/Roller Bearings.

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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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Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

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

Linear ball bearings use spherical balls for lower friction and higher speed applications, while linear roller bearings use cylindrical rollers for higher load capacity and rigidity. Ball bearings excel in precision positioning, while roller bearings handle heavier loads in industrial machinery.

How often should linear bearings be lubricated?

Maintenance intervals depend on operating conditions: Continuous operation requires lubrication every 3-6 months, while intermittent use may extend to 12 months. High-speed or high-load applications need more frequent lubrication (1-3 months). Always follow manufacturer specifications.

Can linear bearings be used in contaminated environments?

Yes, with proper sealing. Sealed linear bearings with rubber or metal seals (IP54-IP67 rated) protect against dust, chips, and liquids. For harsh environments, consider stainless steel bearings with special seals and corrosion-resistant coatings.

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.

Linear Ball/Roller Bearings