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Help CenterONA ORTS 260 High Precision High Speed Rotary Table Bearing P4/P2 for Direct Drive Motor
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ORTS Series – High-Speed Turntable Bearings
The ORTS series is a high-performance variant of the standard ORT turntable bearing line, specifically engineered for applications demanding higher rotational speeds, lower friction torque, and exceptional uniformity of torque across the entire speed range.
Key Design Features
Same External Dimensions, Optimized Internal Geometry
The ORTS series shares the same mounting dimensions as the ORT series, allowing for direct interchangeability without redesigning adjacent components. However, the internal structure has been significantly improved to achieve superior dynamic performance.Higher Speed Limit
Thanks to its optimized internal design, the ORTS series offers a considerably higher limiting speed compared to the ORT standard series.Low and Uniform Friction Torque
Friction torque is not only lower but also remarkably consistent throughout the entire rotational speed range. This uniformity ensures predictable behavior and stable operation under varying speeds.Precision Grades P4 and P2
ORTS bearings are manufactured to precision classes P4 and P2, meeting the most stringent requirements for positioning accuracy in high-end machine tools and measuring equipment.Preloaded for High Rigidity
All bearings in the ORTS series are delivered with an internal preload, ensuring high system rigidity, minimizing deflection, and enhancing machining stability.High Load Capacity
Like the ORT series, ORTS bearings can simultaneously withstand axial loads, radial loads, and overturning moments, making them a compact and efficient solution for complex loading conditions.
Why Choose ORTS for Direct Drive Motors?
The ORTS series is particularly well‑suited for direct drive motor (DD motor) applications. Direct drive systems require bearings with very low and consistent friction torque to achieve smooth starting, stopping, and precise torque control. The combination of high speed capability, low friction, and uniform torque over the full speed range makes ORTS the ideal partner for DD‑driven spindles and rotary axes.
Typical Applications
Precision rotary tables for machining centers and grinding machines
Horizontal grinding machine spindles
Indexing heads (dividing heads)
Gear hobbing and gear milling machines
Workpiece spindles in precision devices and measuring equipment
Any high‑speed, low‑friction rotary application where accuracy and rigidity are critical
Advantages at a Glance
| Feature | Benefit |
|---|---|
| Higher speed limit | Enables faster machining cycles and higher throughput |
| Low & uniform friction torque | Perfect for direct drive motors; stable control at all speeds |
| P4/P2 precision | Guarantees angular positioning accuracy down to arc seconds |
| Preloaded design | High rigidity without additional adjustment |
| Simultaneous load capacity | Axial + radial + overturning loads in one bearing |
| Interchangeable with ORT | Easy upgrade path for existing designs |
Ordering & Availability
ORTS series bearings are available in a range of sizes corresponding to ORT dimensions. For specific model numbers, dimensional data, and custom configurations, please contact our sales engineering team.
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