ORT Series Rotary Table Bearings – The Smart Buyer‘s Choice for High‑Precision CNC Applications

For CNC machine tool builders, the rotary table bearing is a mission-critical component. Its performance directly determines positioning accuracy, rigidity under load, and overall equipment reliability. For years, buyers had limited options—premium European and Japanese brands with long lead times and premium pricing. That equation has changed

Why rotary table bearings demand the highest precision

Rotary table bearings must simultaneously handle axial loads, radial loads, and overturning moments—all while delivering smooth, backlash-free rotation with positioning accuracy measured in arc‑seconds. Standard bearings cannot meet these demands. That is why precision‑engineered rotary table bearings are essential for high‑end machining centers, swiveling milling heads, dividing heads, and direct‑drive rotary axes.

ORT series – engineered for demanding applications

Luoyang Ouna Bearing‘s ORT series rotary table bearings are three‑row roller assemblies: two axial rows for stable axial load capacity, and one radial row enabling the bearing to withstand radial forces and overturning moments. Our complete ORT range includes:

ORT Standard Rotary Table Bearings – For general high-precision rotary applications requiring reliable performance under combined loads. Ideal for machining center rotary tables, indexing heads, and swiveling milling heads. Threaded mounting holes on the housing and shaft washers simplify secure, repeatable mounting.

ORTS High‑Speed Rotary Table Bearings – Features optimized internal geometry achieving higher speed capability than the standard series while retaining identical external dimensions. Ideal for direct-drive motor applications and high-speed rotary axes requiring both speed and precision.

ORTM Rotary Table Bearings with Integrated Measuring System – An angle measurement system embedded into the bearing assembly delivers measurement accuracy up to 1 arc second. The unit simultaneously withstands axial loads, radial loads, and overturning moments while providing real-time positioning feedback—perfect for high-precision CNC rotary tables and research measurement equipment.

OKLDF Bidirectional Thrust Angular Contact Ball Bearings – Specialized for precise bidirectional axial load handling in applications where high stiffness in both axial directions is critical.

Drop‑in compatibility, faster lead times

Our ORT series maintains the same external dimensions and mounting hole patterns as established international brands, meaning you can replace your existing rotary table bearings without redesigning your machinery. Bearings come pre‑loaded, pre‑greased, and ready for immediate installation.

Proven quality at competitive prices

All ORT series bearings are manufactured to P5, P4, and P2 precision grades with premium GCr15 bearing steel and precision heat treatment (HRC 60‑62). Pre‑loaded units arrive clearance-free and ready to mount, eliminating adjustment time on your production line.

Upgrade your rotary table supply chain

Contact our CNC applications team with your current rotary table bearing specifications. We will provide a cross‑reference and quotation within 48 hours. For qualified OEMs, sample orders are available for in‑machine validation before volume procurement. Fast lead times and engineering support are standard—you no longer need to wait months for critical rotary table bearings from traditional premium suppliers.