INDUSTRY COMPONENT

Recirculating Ball/Roller Bearings

Precision recirculating ball/roller bearings for smooth linear motion in guide systems with high load capacity and minimal friction.

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Component Specifications

Definition
Recirculating ball/roller bearings are precision linear motion components used in linear guide systems, where balls or rollers circulate through a raceway to provide smooth, low-friction linear movement. They consist of a bearing block (carriage), recirculating elements (balls or rollers), end caps, seals, and a guide rail. The design allows infinite travel length by continuously recirculating the rolling elements through a closed path within the carriage, maintaining consistent contact and load distribution.
Working Principle
The working principle involves rolling elements (balls or rollers) that circulate continuously within a closed loop inside the bearing carriage. As the carriage moves along the guide rail, the rolling elements roll between the carriage and rail surfaces, then recirculate through return channels to maintain continuous motion. This recirculation mechanism enables unlimited linear travel while minimizing friction and wear.
Materials
Bearing blocks: Carbon steel (S45C, S55C) or stainless steel (SUS440C, SUS304). Rolling elements: Chrome steel (GCr15), stainless steel, or ceramic (Si3N4). Guide rails: Carbon steel with induction hardening (HRC 58-62) or stainless steel. Seals: Nitrile rubber (NBR) or polyurethane.
Technical Parameters
  • Rigidity 200-800 N/μm
  • Travel Speed Up to 5 m/s
  • Load Capacity Dynamic: 10-100 kN, Static: 15-150 kN
  • Repeatability ±0.001-0.01 mm
  • Precision Grade Normal (C), High (H), Precision (P), Ultra-precision (UP)
  • Lubrication Interval 500-5,000 km depending on conditions
  • Operating Temperature -30°C to +120°C
Standards
ISO 14728, DIN 645, JIS B 1192

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Recirculating Ball/Roller Bearings.

linear bearing recirculating ball bearing roller bearing linear guide system precision bearing linear motion component machine tool bearing Recirculating Ball/Roller Bearings Recirculating Ball/Roller Bearings in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Linear Guide System

A precision mechanical system that provides smooth, accurate linear motion for machine tool components.

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Engineering Analysis

Risks & Mitigation
  • Contamination leading to premature wear
  • Inadequate lubrication causing seizure
  • Misalignment reducing precision and lifespan
  • Overload beyond rated capacity
  • Vibration-induced fatigue failure
FMEA Triads
Trigger: Contamination from dust, chips, or fluids
Failure: Increased friction, scoring of raceways, premature wear
Mitigation: Install proper seals, use protective covers, implement regular cleaning protocols
Trigger: Insufficient or improper lubrication
Failure: Metal-to-metal contact, overheating, seizure
Mitigation: Follow manufacturer lubrication schedules, use recommended lubricants, install automatic lubrication systems
Trigger: Misalignment during installation
Failure: Uneven load distribution, reduced precision, accelerated wear
Mitigation: Use precision alignment tools, follow installation procedures, verify parallelism within 0.01 mm/m

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 286-1:2010 for dimensional tolerances, ISO 1101:2017 for geometric tolerances
Test Method
ISO 14728-1: Dynamic load testing, ISO 14728-2: Static load testing, vibration analysis, precision measurement using laser interferometers

Buyer Feedback

★★★★☆ 4.7 / 5.0 (20 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Recirculating Ball/Roller Bearings meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Recirculating Ball/Roller Bearings arrived with full certification."

"Great transparency on the Recirculating Ball/Roller Bearings components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

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

Recirculating ball bearings use spherical balls as rolling elements, offering lower friction and higher speeds. Recirculating roller bearings use cylindrical rollers, providing higher load capacity and rigidity but slightly higher friction.

How often should recirculating bearings be lubricated?

Lubrication intervals depend on operating conditions: typically 500-5,000 km of travel. High-speed, high-load, or contaminated environments require more frequent lubrication (every 500-1,000 km), while clean, moderate conditions allow longer intervals (3,000-5,000 km).

Can recirculating bearings handle moment loads?

Yes, but capacity varies by design. Four-row ball bearings handle moderate moments, while roller bearings with multiple contact points provide better moment load resistance. Always check manufacturer specifications for specific moment load ratings.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Ram/Stem Recirculating Balls/Rollers