YRT / YRTS / YRTM Rotary Table Bearings

YRT/YRTS/YRTM Rotary Table Bearings Structure Diagram

YRT / YRTS / YRTM Dimensions and Fixing Holes

Product Overview

YRT, YRTS, and YRTM series are high-precision rotary table bearings specifically developed for machine tool rotary tables, indexing systems, direct-drive platforms, and precision positioning equipment.

These bearings integrate:

• Two axial needle roller thrust bearings
• One radial cylindrical roller bearing

into a single compact unit capable of simultaneously supporting axial loads, radial loads, and tilting moments.

Compared with conventional bearing arrangements, YRT series bearings provide significantly higher rigidity, better rotational accuracy, and superior positioning repeatability.

They are widely used in CNC rotary tables, 4-axis and 5-axis machining centers, semiconductor equipment, aerospace systems, measuring devices, and precision automation machinery.

Structural Features

Integrated Axial-Radial Bearing Structure

The YRT family combines:

• Upper axial roller raceway
• Lower axial roller raceway
• Radial roller raceway

within one bearing assembly.

This allows the bearing to withstand:

• Axial loads from both directions
• Radial loads
• Overturning moments

simultaneously.

High-Rigidity Design

The preloaded roller arrangement minimizes deformation under load.

Precision Ground Raceways

Raceways are precision ground and matched to achieve extremely low runout and high positioning accuracy.

Mounting Hole Structure

Both inner and outer rings are supplied with mounting holes, simplifying installation and improving assembly accuracy.

Difference Between YRT, YRTS and YRTM

YRT Series

Standard Precision Rotary Table Bearing

Structure:

• Two axial roller assemblies
• One radial roller assembly
• Standard preload design

Advantages:

• High rigidity
• High accuracy
• Excellent load capacity
• Cost-effective solution

Best For:

• CNC rotary tables
• Indexing tables
• General precision positioning systems

YRTS Series

High-Speed Rotary Table Bearing

Structure Improvements:

• Optimized raceway geometry
• Improved lubrication path
• Reduced friction torque
• High-speed cage design

Advantages:

• Higher rotational speed
• Lower operating temperature
• Reduced torque fluctuation
• Better dynamic performance

Best For:

• Direct-drive rotary tables
• High-speed machine tools
• High-speed positioning platforms

YRTM Series

Rotary Table Bearing with Measuring System

Structure Features:

• Integrated angle measurement system
• High-resolution encoder interface
• Precision positioning feedback

Advantages:

• Closed-loop control capability
• Higher positioning accuracy
• Real-time angle monitoring
• Improved automation performance

Best For:

• CNC machining centers
• Aerospace positioning systems
• Precision measuring equipment
• High-end automation systems

Why Choose YRT Series Bearings?

YRT bearings are ideal when applications require:

• High rigidity
• Precision positioning
• Large moment load capacity
• Long-term accuracy
• Stable rotational performance

These requirements are common in modern machine tools and automation systems.

Comparison with Other Rotary Bearings

YRT vs Cross Roller Bearings

Cross roller bearings provide compact dimensions and excellent rigidity.

YRT bearings provide:

• Higher axial load capacity
• Better rotary table performance
• Improved preload stability
• Greater resistance to machining forces

YRT vs ZKLDF Bearings

ZKLDF bearings use angular contact ball structures.

YRT bearings use roller structures.

Result:

• YRT = Higher rigidity and load capacity
• ZKLDF = Higher rotational speed and lower friction

YRT vs Slewing Bearings

Slewing bearings are optimized for heavy-duty rotation.

YRT bearings are optimized for precision positioning and machine tool applications.

Technical Specifications

Product Type:

Rotary Table Bearing

Series:

YRT / YRTS / YRTM

Structure:

Axial-Radial Combined Roller Bearing

Bearing Components:

• Two Axial Needle Roller Assemblies
• One Radial Cylindrical Roller Assembly

Material:

• GCr15
• GCr15SiMn
• 100Cr6

Accuracy Grade:

• P5
• P4
• P2

Operating Temperature:

-20°C to +120°C

Lubrication:

Grease Lubricated

OEM Service:

Available

Customized Design:

Available

Typical Models

YRT Series

YRT50

YRT80

YRT100

YRT120

YRT150

YRT180

YRT200

YRT260

YRT325

YRT395

YRT460

YRT580

YRT650

YRT850

YRT950

YRTS Series

YRTS150

YRTS200

YRTS260

YRTS325

YRTS460

YRTS580

YRTM Series

YRTM150

YRTM200

YRTM260

YRTM325

YRTM460

YRTM580

Custom dimensions are available upon request.

Typical Applications

• CNC Rotary Tables
• 4-Axis Machining Centers
• 5-Axis Machining Centers
• Direct Drive Turntables
• Indexing Tables
• Semiconductor Equipment
• Measuring Systems
• Aerospace Positioning Platforms
• Radar Systems
• Automation Equipment

Key Advantages

• High rigidity
• High positioning accuracy
• Large axial load capacity
• Excellent moment load resistance
• Low runout
• Long service life
• Easy installation
• Stable long-term performance

Quality Assurance

Certifications

• ISO 9001 Quality Management System
• Material Traceability Reports
• Hardness Inspection Reports
• Accuracy Inspection Reports
• Final Inspection Records

Manufacturing Process

1. Raw Material Inspection
2. Precision Turning
3. Heat Treatment & Cryogenic Stabilization
4. Raceway Grinding
5. Raceway Superfinishing
6. Roller Manufacturing
7. Precision Measurement
8. Deep Cleaning
9. Precision Assembly
10. Preload Verification
11. Torque Testing
12. Final Inspection
13. Laser Marking
14. Rust Prevention
15. Vacuum Packaging
16. Shipment

Packaging & Shipping

Standard Packaging

• Anti-rust Oil Protection
• Vacuum Packaging
• Shockproof Foam Protection
• Individual Carton Box
• Export Plywood Case

Shipping Options

• DHL
• FedEx
• UPS
• Air Freight
• Sea Freight
• DDP Available

Installation & Maintenance

Installation Recommendations

• Ensure mounting surfaces are flat and clean.
• Tighten mounting bolts evenly according to specified torque values.
• Verify preload and runout after installation.
• Follow lubrication recommendations.

Maintenance Guidelines

• Monitor operating temperature.
• Inspect lubrication condition periodically.
• Prevent contamination.
• Check rotational accuracy during scheduled maintenance.

Frequently Asked Questions

What is the main difference between YRT and YRTS bearings?

YRTS bearings are optimized for higher rotational speeds through improved raceway design and reduced friction torque.

When should I choose YRTM instead of YRT?

Choose YRTM when the application requires integrated angle measurement and closed-loop positioning control.

Why are YRT bearings widely used in CNC rotary tables?

Their combined axial-radial roller structure provides exceptional rigidity and positioning accuracy.

Are YRT bearings suitable for direct-drive systems?

Yes. YRTS and YRTM are especially suitable for direct-drive rotary tables and torque motor systems.

How do YRT bearings compare with ZKLDF bearings?

YRT bearings provide higher rigidity and load capacity, while ZKLDF bearings generally offer higher speed capability.

Can YRT bearings support axial, radial, and moment loads simultaneously?

Yes. The integrated roller structure is specifically designed for combined loading conditions.

What industries benefit most from YRT series bearings?

Machine tools, semiconductor manufacturing, aerospace systems, precision automation, radar platforms, and measuring equipment.

What precision grades are available?

P5, P4, and P2 precision grades are available.

Can LYDL provide customized YRT bearings?

Yes. LYDL offers custom dimensions, preload optimization, laser marking, lubrication solutions, and OEM manufacturing services.

Request a Quote

Looking for a reliable YRT, YRTS, or YRTM Rotary Table Bearing Manufacturer?

Contact LYDL today for technical drawings, pricing, customization services, and engineering support.