Assembly Turntable Bearing: High-Precision Rotary Solutions for Advanced Manufacturing
Product Overview
As a professional manufacturer specializing in rotational motion solutions, ZZ understands that the heart of any precision machine tool is its rotary table. Our Assembly Turntable Bearings (often categorized under the YRT series) are engineered to provide the ultimate stability for high-speed and high-precision machining.
Unlike standard bearings, an assembly turntable bearing is a complex unit designed to handle combined loads—axial, radial, and moment loads—simultaneously. These bearings are the "steady backing" for modern CNC machinery, ensuring that whether you are milling complex aerospace components or grinding optical lenses, the rotation remains true, rigid, and vibration-free.
Our turntable bearings feature a unique design with one radial row of rollers and two axial rows, all arranged to ensure optimal load distribution. This structure allows for high rigidity and precise guidance, making them indispensable for direct drive motor applications and high-precision indexing tables.
Performance and Quality Characteristics
At ZZ, we don't just manufacture bearings; we engineer reliability. Our assembly turntable bearings are built to withstand the rigors of continuous industrial operation while maintaining micron-level accuracy.
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Exceptional Rigidity and Load Capacity: The internal geometry utilizes a full complement of cylindrical rollers. The two axial rows of rollers handle thrust loads in both directions, while the radial row supports radial forces. This ensures the bearing can withstand significant tilting moments without deformation.
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High Rotational Accuracy: Precision is paramount. Our bearings are manufactured with tight tolerances, offering high radial and axial runout accuracy (often within microns). This translates to superior surface finishes on machined parts.
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Low Friction and Heat Generation: Despite their high load capacity, our bearings are designed for smooth operation. The precision-ground rollers and optimized raceways minimize friction, reducing heat generation during high-speed rotation, which is critical for maintaining thermal stability in machine tools.
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Integrated Sealing: To protect the internal components from coolant, chips, and dust—common hazards in machining environments—our bearings are equipped with high-quality, multi-lip seals. This extends the service life and maintenance intervals.
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Pre-loaded Design: Supplied with a specific axial preload, these bearings eliminate internal clearance, providing immediate rigidity upon installation without the need for complex adjustments.
Technical Specifications
While we offer custom solutions, our standard assembly turntable bearings (YRT Series) follow a robust specification framework designed for interchangeability and performance.
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Parameter
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Specification / Description
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Product Series
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YRT / YRTS / HRTG Series
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Structure
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Triple-row roller assembly (1 Radial + 2 Axial)
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Roller Type
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Full complement cylindrical rollers
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Accuracy Class
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P4 / P2 / SP (Super Precision)
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Material
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High-Carbon Chromium Bearing Steel (e.g., 100Cr6 / SAE 52100)
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Hardness
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Raceways: 58-62 HRC
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Sealing
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Double-sided contact seals (Rubber/NBR)
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Lubrication
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Pre-greased (Lithium complex) with relubrication holes
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Mounting
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Bolted connections via threaded holes or through-holes
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Note: Dimensions (ID, OD, Height) vary by model number (e.g., YRT100, YRT260, YRT460).
Certifications and Standards
Quality is not a promise; it is a verified standard at ZZ. Our manufacturing processes and final products adhere to rigorous international standards to ensure compatibility and safety in global markets.
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ISO 9001:2015: Our facility operates under a certified Quality Management System, ensuring consistency in every bearing produced.
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DIN / ISO Dimensional Standards: Our bearings are manufactured to match global interchangeability standards (compatible with major international brands), facilitating easy replacement and integration.
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Material Traceability: We utilize only certified bearing-grade steel with full material traceability reports (MTRs) to guarantee metallurgical integrity.
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Precision Testing: Every unit undergoes strict dimensional inspection and rotational accuracy testing using high-precision air electronic gauges before leaving the factory.
Product Service and Support
We know that choosing the right bearing is only half the battle; support is the other half. ZZ is committed to being more than just a supplier.
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OEM & ODM Capabilities: Whether you need a specific flange modification, a custom grease specification for extreme temperatures, or a private label, our engineering team can adapt our designs to your needs.
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Technical Consultation: Our engineers are available to assist with bearing selection, calculating equivalent dynamic loads, and advising on housing and shaft fits to maximize bearing life.
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Rapid Prototyping: For specialized machinery, we offer rapid prototyping services to get your project moving without long lead times.
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After-Sales Support: We provide detailed installation manuals and are available to troubleshoot any operational issues, ensuring your machinery stays up and running.
Product Applications
Our assembly turntable bearings are the preferred choice for industries requiring high dynamic loads and precise positioning.
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CNC Machining Centers: Specifically for 4th and 5th-axis rotary tables and indexing heads.
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Vertical Grinding Machines: Providing the rigidity needed for precision grinding operations.
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Direct Drive Motors (DDR): The YRT series is the standard mounting interface for high-torque motors.
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Robotics: Used in the joints of heavy-duty industrial robots requiring high moment load capacity.
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Precision Milling & Boring: Ensuring stability during heavy cutting operations.
Frequently Asked Questions (FAQ)
Q1: What is the difference between YRT and YRTS series bearings?
A: While both are high-precision turntable bearings, the YRTS series is specifically designed for higher speeds. It features a different internal cage design and lower friction, making it ideal for applications with higher RPM requirements compared to the standard YRT series.
Q2: Can these bearings be re-lubricated?
A: Yes. Our assembly turntable bearings feature lubrication holes in both the inner and outer rings, allowing for periodic re-greasing to extend service life without disassembly.
Q3: Do you offer bearings with integrated angle measurement systems?
A: Yes, we offer specialized series (similar to the HRTGM) that integrate angle measurement systems directly into the bearing, simplifying the axis structure for CNC rotary tables.
Q4: What is the typical lead time for standard models?
A: For standard models (e.g., YRT100 to YRT460), we typically maintain stock or have a short production lead time of 7-15 days, depending on quantity.
Q5: How do I ensure the mounting surface is correct?
A: To achieve the rated accuracy, the mounting surfaces (shaft and housing) must be machined to tight tolerances (usually IT5 or IT6) and have high parallelism. We recommend consulting our installation drawings for specific surface finish requirements.
