Turn-Mill Composite Rotary Table Bearings | BY Bearings

Rotary Table Bearings for Turn-Mill Composite Machines | High-Precision & High-Rigidity Slewing Bearing Solutions

Turn-mill composite machines are core equipment for modern precision mechanical manufacturing. Integrating turning, milling, drilling, boring, tapping and other processing procedures, they enable full-process machining of complex workpieces in a single clamping setup. These machines are widely applied in high-end sectors including aerospace, automotive manufacturing, medical devices and precision molds. Such equipment imposes stringent requirements on the rotary components in terms of precision, rigidity, load capacity and operational stability. As a key supporting part for CNC rotary tables, C-axis indexing mechanisms and 5-axis swing heads, rotary table bearings directly determine the overall machining accuracy and service life of the machine tools.

A rotary table bearing is an integrated precision slewing bearing capable of bearing radial loads, axial loads and overturning moments simultaneously. Unlike standard conventional bearings, it features a special roller/ball arrangement and is preloaded with negative clearance upon delivery. It boasts outstanding performance such as high rotary accuracy, compact structure, excellent vibration resistance and high protection class. A single rotary table bearing can replace combined assemblies of multiple conventional bearings, greatly simplifying the mechanical design of equipment. It is also an essential foundational component for high-end CNC machine tools to achieve high-precision indexing and stable rotation.

Adaptation Advantages of Rotary Table Bearings for Turn-Mill Composite Machines

Turn-mill composite machining involves complex working conditions: the bearing needs to support high-speed and smooth operation during turning, while milling generates intermittent impact loads and substantial overturning moments. Machining sites are also harsh with cutting fluid and metal dust. Rotary table bearings are perfectly tailored to such operating conditions in both structure and performance:

• Superior composite load capacity: It withstands radial forces, axial forces and overturning moments concurrently, coping with variable loads caused by switching between turning and milling and preventing component deformation.

• Micron-level rotary accuracy: High-precision models control radial and end runout within the micron range, guaranteeing the coaxiality, roundness and repeat positioning accuracy of workpieces and eliminating machining errors.

• High rigidity and excellent vibration damping: Standard preload design eliminates bearing clearance and enhances overall rigidity, effectively suppressing vibration generated in milling and improving the surface finish of machined workpieces.

• Compact structure for easy assembly: The integrated flange design comes with pre-machined mounting holes, lubrication holes and sealing structures, conforming to the trend of integration and miniaturization of turn-mill composite machines and shortening assembly cycles.

• Environmental resistance and long service life: Equipped with composite sealing structures, it effectively blocks cutting fluid and dust from entering the bearing interior, meeting the demands of long-term continuous operation of machine tools.

Rotary table bearings have extensive applications in the turn-mill composite industry, including CNC rotary tables for 5-axis linkage turn-mill machines, high-speed direct-drive indexing tables, heavy-duty horizontal rotary tables, equipment C-axis support mechanisms, power turrets and 5-axis swing heads. Bearings with different structures are selected according to load, rotational speed and precision requirements:

• Cross roller rotary table bearings feature an ultra-thin structure and strong overturning resistance, ideal for 5-axis swing heads and compact precision rotary tables.

• Three-row roller rotary table bearings deliver heavy load capacity and high rigidity, suitable for heavy-duty milling of large workpieces.

• Thrust angular contact ball rotary table bearings are characterized by low friction and low heat generation, making them the top choice for high-speed rotary tables.

BY Bearings Rotary Table Bearings: Exclusive Products for Turn-Mill Composite Industry

As a professional manufacturer of precision bearings, BY Bearings devotes itself to the R&D and production of rotary table bearings. We have developed a full range of products customized for the working conditions of turn-mill composite machines, realizing domestic substitution of high-end bearings. Our core strengths are as follows:

1. Comprehensive product portfolioWe offer three main series

   BRT three-row roller bearings, BLDF thrust angular contact ball bearings and CRB cross roller bearings. The full product lineup covers diverse application scenarios including high-speed operation, heavy load, ultra-thin design and high precision, with performance comparable to imported equivalents.

2. Multiple precision grades available

   We regularly provide products in P5, P4 and P2 precision classes. The highest grade achieves a rotary accuracy within 1 μm with excellent indexing performance, fully meeting the requirements of high-end precision machining.

3. Premium material with superior fatigue resistance

   Manufactured from high-carbon chromium bearing steel and carburizing bearing steel with professional heat treatment, our bearings feature high hardness, outstanding wear resistance and impact resistance, capable of enduring alternating loads from machine tools over long periods.

4. Mature craftsmanship and high stability

   All products are precisely preloaded before delivery for enhanced overall rigidity. They operate clearance-free with low vibration, perfectly adapting to the continuous working mode of turn-mill composite machines. Standard dual-lip and labyrinth combined sealing ensures a high protection class for reliable performance in harsh machining environments.

5. Customization & one-stop supporting services

   We support non-standard customization for bore sizes ranging from 50 mm to 2000 mm, as well as special precision and sealing requirements. Meanwhile, we provide one-stop technical services including type selection guidance, installation commissioning and routine maintenance to reduce customers’ operational costs.

6. Cost-effective domestic solutions

   With independently controlled core production technologies and processes, our products match the performance of world-renowned brands. We optimize costs while maintaining premium quality, helping machine tool manufacturers in the turn-mill composite sector cut costs and improve efficiency.

Nowadays, high-precision rotary table bearings have become core accessories for the upgrading and iteration of turn-mill composite machines. Featuring reliable quality, complete product range and professional services, BY Bearings rotary table bearings have established long-term partnerships with numerous domestic and foreign machine tool manufacturers, delivering dependable slewing support solutions for the turn-mill manufacturing industry.