Crossed Roller Slewing Bearings For Cnc Machine Tools

Crossed Roller Slewing Bearings For Cnc Machine Tools
Crossed Roller Slewing Bearings For Cnc Machine ToolsCrossed Roller Slewing Bearings For Cnc Machine ToolsCrossed Roller Slewing Bearings For Cnc Machine Tools
    In the world of high-end CNC machining, particularly in 5-axis milling and turning centers, the difference between a mirror-like surface finish and a part that requires re-work often comes down to a single component: the rotary bearing. When a spindle is cutting titanium or aerospace aluminum at high speeds, any minute deflection, vibration, or backlash in the rotary table is directly transferred to the workpiece. Standard slewing bearings simply cannot handle the dynamic loads and precision requirements of modern CNC machine tools.
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Product Overview: Precision Engineering for the Shop Floor

Our crossed roller slewing bearing series is not an off-the-shelf commodity; it is a precision instrument designed for the heart of your machine tool.
  • Optimized Roller Geometry: We utilize ground cylindrical rollers arranged in alternating perpendicular directions. This configuration allows a single bearing unit to simultaneously support radial, axial, and moment loads, eliminating the need for multiple bearing sets and reducing the overall footprint of the rotary table.
  • Preloaded for Zero Play: Every bearing undergoes a precise preloading process during assembly. By carefully adjusting the internal clearance, we eliminate all axial and radial play, creating a high rigidity rotary table bearing that resists deformation under cutting torque. This ensures repeatability in the micron range.
  • Integrated Gear Options: For direct-drive rotary tables, we offer bearings with integrated internal or external gears. These gears are hard-finished and ground to DIN Class 5 or better, ensuring smooth engagement with the torque motor and minimizing transmission error.
  • Low-Friction Design: Despite the high preload, our optimized raceway geometry and premium lubrication channels ensure low starting and running torque. This is critical for low friction rotary bearing applications where smooth, jitter-free motion at low speeds is essential for fine surface finishes.


Key Features: Engineered for Uncompromising Accuracy

  • Exceptional Moment Load Capacity: The crossed roller design offers up to 3x the moment load capacity of comparable ball bearings, making it ideal for 5-axis machining center slew ring applications where overhang loads are significant.
  • Ultra-Low Backlash (< 0.01mm): Our tight tolerance manufacturing ensures virtually zero backlash, crucial for maintaining path accuracy during complex 3D profiling and simultaneous 5-axis interpolation.
  • High Rotational Accuracy: Manufactured to P4 grade crossed roller bearing standards (with P2 available on request), our bearings deliver exceptional runout control, ensuring the spindle axis remains perfectly aligned with the workpiece.
  • Compact & Lightweight: By combining multiple load functions into a single compact unit, we allow machine designers to create lighter, more agile rotary axes without sacrificing structural integrity.
  • Sealed for Longevity: Equipped with multi-lip seals and efficient grease distribution channels, our machine tool rotation solution protects against coolant ingress and chip contamination, extending service life in harsh shop floor environments.


Applications: Powering the Next Generation of CNC Machines

Our crossed roller slewing bearings for CNC machine tools are the trusted choice for critical motion axes in:
  • 5-Axis Machining Centers: Serving as the core rotation element for A/C axes in gantry mills and vertical machining centers, enabling complex aerospace and mold-making operations.
  • CNC Rotary Tables: Providing the foundation for high-precision indexing tables used in die/mold manufacturing and automotive component production.
  • Tilting Heads & Trunnions: Supporting the heavy spindle heads in tilting-head configurations, ensuring stability during aggressive cutting strategies.
  • Mill-Turn Centers: Facilitating the precise rotation of the B-axis in mill-turn machines, allowing for complete part machining in a single setup.
  • Precision Grinding Machines: Used in rotary worktables where nanometer-level surface finishes are required, benefiting from our bearing's smooth motion and high stiffness.

Tag: Crossed Roller Slewing Bearings

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