INDUSTRY COMPONENT

Rotary Bearing

A precision mechanical component that enables smooth rotational motion between machine parts while supporting axial and radial loads.

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Component Specifications

Definition
A rotary bearing is a specialized rolling-element bearing designed to facilitate controlled rotation between stationary and moving components in machinery. It consists of inner and outer rings with precisely engineered raceways, rolling elements (balls or rollers), and a cage or separator. This component minimizes friction, supports combined loads (radial, axial, and moment loads), maintains alignment, and ensures precise rotational accuracy in industrial applications.
Working Principle
Operates on the principle of rolling contact, where rolling elements (balls or rollers) rotate between inner and outer raceways, converting sliding friction into lower rolling friction. This reduces energy loss, heat generation, and wear while distributing loads evenly across contact surfaces. Lubrication (grease or oil) further minimizes friction and prevents metal-to-metal contact.
Materials
Typically made from high-carbon chromium steel (AISI 52100/SUJ2) or stainless steel (AISI 440C) for corrosion resistance. Ceramic (silicon nitride) or hybrid (steel rings with ceramic balls) variants exist for high-speed or extreme environments. Retainers are often steel, brass, or polymer (PEEK, nylon).
Technical Parameters
  • Sealing Contact (rubber) or non-contact (labyrinth) seals
  • Clearance C0-C5 (radial internal clearance)
  • Speed Rating Up to 20,000 rpm (depending on type and lubrication)
  • Load Capacity Dynamic: 15-200 kN, Static: 10-150 kN
  • Precision Class ABEC 1-9 or ISO P0-P2
  • Operating Temperature -30°C to +120°C (standard), up to +200°C (special)
Standards
ISO 15, ISO 76, ISO 281, DIN 625, DIN 628

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotary Bearing.

rotary bearing rotating bearing slewing ring turntable bearing axial-radial bearing precision bearing industrial bearing bearing specifications Rotary Bearing in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Rotating Worktable

A precision rotating platform that holds and positions workpieces during machining operations on a CNC vertical lathe.

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Engineering Analysis

Risks & Mitigation
  • Overloading leading to premature fatigue failure
  • Contamination from dust/debris causing abrasive wear
  • Improper installation causing misalignment and uneven load distribution
  • Inadequate lubrication resulting in overheating and seizure
  • Corrosion in humid or chemical environments
FMEA Triads
Trigger: Insufficient or contaminated lubrication
Failure: Increased friction, overheating, and eventual bearing seizure
Mitigation: Implement scheduled lubrication maintenance with clean, appropriate lubricants; use sealed bearing designs in dirty environments
Trigger: Misalignment during installation
Failure: Uneven load distribution, accelerated wear, and reduced bearing life
Mitigation: Use precision alignment tools during installation; follow manufacturer torque specifications; verify runout after installation
Trigger: Excessive axial or radial loads beyond rated capacity
Failure: Brinelling, raceway spalling, or catastrophic fracture
Mitigation: Calculate operational loads accurately; select bearings with appropriate safety factors; install overload protection devices

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 492 (Normal class) or ABEC 1-9 for precision; radial runout tolerance typically 0.005-0.02 mm
Test Method
ISO 15242 (vibration testing), ISO 76 (static load rating verification), ISO 281 (dynamic load rating and life calculation)

Buyer Feedback

★★★★☆ 4.8 / 5.0 (34 reviews)

"The Rotary Bearing we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

"Found 14+ suppliers for Rotary Bearing on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Rotary Bearing is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the difference between a rotary bearing and a standard ball bearing?

Rotary bearings are designed to handle combined loads (axial, radial, and moment) simultaneously, often with larger dimensions and higher load capacities, while standard ball bearings typically handle primarily radial loads and are smaller in size.

How often should rotary bearings be lubricated?

Lubrication intervals depend on operating conditions: typically every 6-12 months for standard applications, or continuously lubricated in high-speed/heavy-load environments. Follow manufacturer specifications based on speed, load, and temperature.

Can rotary bearings be used in vertical orientations?

Yes, but orientation affects load distribution and lubrication. Special designs with enhanced sealing and lubrication systems are recommended for vertical applications to prevent lubricant leakage and ensure even load support.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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