What is a YRT turntable bearing?

A YRT turntable bearing is a precision axial-radial bearing designed for rotary tables and other high-precision rotary applications. It can accommodate radial loads, axial loads in both directions, and tilting moments while maintaining high running accuracy and rigidity.

What loads can YRT turntable bearings support?

YRT bearings are designed for combined loading conditions. They can support radial loads, bidirectional axial loads, and tilting moments without internal clearance, making them suitable for rotary systems exposed to both axial forces and overturning loads.

What are YRT turntable bearings used for?

YRT bearings are commonly used in CNC rotary tables, machine-tool rotary axes, faceplates, milling heads, and reversible clamping systems. They are particularly suitable for equipment requiring high rotational accuracy, rigidity, and stable positioning.

What is the difference between YRT and ZKLDF turntable bearings?

YRT is an axial-radial bearing using axial and radial roller bearing arrangements, while ZKLDF is an axial angular contact ball bearing. Both are designed for precision rotary applications and combined loads, but ZKLDF is particularly suited to very high rotational speeds, while YRT is widely used where high rigidity and precision are required.

What should I consider when selecting a YRT bearing?

Bearing selection should consider the required bore and outside diameter, axial and radial loads, tilting moment, rotational speed, required accuracy, rigidity, operating temperature, lubrication, and available installation space. The selected bearing should be evaluated against the actual load and operating conditions rather than based on dimensions alone.

YRT Turntable Bearing

Axial and radial runout accuracy.

YRT series rotary table bearings feature a combined structural design comprising a set of full-complement radial rollers and two sets of thrust roller-and-cage assemblies. They consist of an outer ring, an L-shaped inner ring, and a second inner ring. Both the inner and outer rings are equipped with mounting holes, and the bearings are preloaded prior to shipment; this design not only simplifies the component structure but also reduces the workload and technical requirements associated with installation.

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What Are YRT Turntable Bearings?

YRT Turntable Bearings are precision rotary bearings designed for applications where high rigidity, accurate rotation, and combined load capacity are essential. A typical YRT bearing consists of axial/radial rings, thrust washers, roller cage assemblies, and radial cylindrical rollers. Mounting holes are integrated into the bearing rings for direct flange mounting.

Unlike conventional radial bearings, YRT bearings are designed to accommodate multiple load directions within one bearing arrangement. Their preloaded structure helps provide stable rotation, high stiffness, and controlled running accuracy, making them particularly suitable for precision rotary equipment.

Key Features of YRT Rotary Table Bearings

Axial-Radial Combined Load Capacity

YRT bearings can simultaneously accommodate radial loads, bidirectional axial loads, and overturning moments. This combined-load capability makes them suitable for rotary systems where the bearing must maintain positional stability under complex loading conditions.

High Rigidity for Precision Rotation

High rigidity is one of the key characteristics of the YRT series. The bearing's preloaded internal structure helps minimize unwanted movement under load, supporting accurate positioning and stable rotary motion in precision machine-tool applications.

High Running Accuracy

YRT Turntable Bearings are designed for applications requiring precise rotary positioning and repeatable movement. Standard YRT products are available in precision grades such as P5 and P4, while some manufacturers also offer higher precision configurations depending on application requirements.

Preloaded and Ready-to-Mount Design

YRT bearings are generally supplied with axial and radial preload, eliminating the need for conventional clearance adjustment during installation. Evenly distributed mounting holes also allow the bearing to be directly secured to the corresponding machine components.

YRT Turntable Bearing Applications

YRT bearings are widely used in precision rotary equipment where high rigidity and positioning accuracy are required. Typical applications include:

CNC rotary tables – supports precise rotary positioning and machining operations.
Indexing tables – provides stable rotation and repeatable indexing.
Milling and grinding heads – handles combined loads while maintaining rotary accuracy.
Gear hobbing and gear milling machines – supports precision workpiece rotation.
Multi-axis machining centers – serves as a precision rotary axis bearing.
Measurement and testing equipment – supports applications requiring controlled and accurate rotation.

Available Models & Specifications

Click on any part number to view detailed CAD drawings and download PDF specifications.

Part Number	Bore (d)	Outer (D)	Width (B)
YRT100	100 mm	185 mm	38 mm
YRT1030	1030 mm	1300 mm	145 mm
YRT120	120 mm	210 mm	40 mm
YRT1200	1200 mm	1490 mm	164 mm
YRT150	150 mm	240 mm	40 mm

YRT Series Size & Performance

YRT Turntable Bearings are available in a broad range of bore and outside diameters to accommodate different rotary table designs. Common models include YRT50, YRT80, YRT100, YRT120, YRT150, YRT180, YRT200 and larger sizes. Published manufacturer data shows that YRT dimensions, load ratings, limiting speeds, friction torque, and weight vary by model, so the bearing should be selected according to the actual machine load and operating conditions.

For example, the YRT100 has a 100 mm bore and 185 mm outside diameter in commonly published specifications, while larger models extend to significantly larger diameters for heavy-duty rotary applications.

How to Select the Right YRT Bearing

Choosing a YRT Turntable Bearing requires more than matching the bore diameter. Key selection parameters include:

Axial load: Maximum and operating axial forces acting on the rotary axis.

Radial load: Radial forces generated by the workpiece, tooling, or machine structure.

Overturning moment: Moment load caused by an offset workpiece or external force.

Rotational speed: Actual operating speed and duty cycle.

Required accuracy: Positioning, runout, and rotational accuracy requirements.

Rigidity: Required stiffness under machining or positioning loads.

Mounting dimensions: Bore, outside diameter, height, bolt-hole pattern, and mating components.

Lubrication and operating environment: Lubrication method, temperature, contamination, and maintenance conditions.

Providing these parameters before ordering helps ensure that the selected YRT bearing matches the mechanical requirements of the rotary system.

Why Choose Our YRT Turntable Bearings?

We provide YRT Turntable Bearings for precision rotary applications requiring high load capacity, high rigidity, and reliable rotational accuracy. Our engineering team can assist with model selection based on load conditions, dimensions, rotational speed, precision requirements, and installation configuration.

For OEM and replacement applications, customers can provide the required bearing model, machine specifications, or operating conditions. We can then recommend a suitable YRT bearing configuration and provide technical information for integration into the rotary system.