XV-Inner Ring Split Type

Features and Benefits:

Crossed roller bearings INA XV series, Integrated outer ring with mounting holes, Two-piece inner ring, to be screwed mounted through the outer ring to the adjacent construction (the inner ring is located by means of a locknut) and can be adjusted very precisely to give clearance or preload by means of the locknut. 

• An Outer Ring and Inner Ring/Chrome Steel or Stainless Steel
• Steel Balls or Rollers/GrCr15 orGrCr15SiMn、Separators
• NBR Seals
• Tolerance and Clearance Available
• Precision/P0、P2、P4、P5
• Brand/LYNBC、OEM、ODM
• Quality Exchangeable with IKO、INA、THK、TIMKEN

What are XV Series Crossed Roller Bearings?

Definition: XV Series crossed roller bearings are a specific type of rolling element bearing designed for applications demanding exceptional precision, rigidity, and load-carrying capacity in a compact form factor. They are a subset within the larger category of crossed roller bearings but typically denote a very specific dimensional profile and construction.

Key Characteristic - Crossed Rollers: The "crossed" configuration is fundamental. Cylindrical rollers are arranged alternately at right angles to each other between inner and outer rings. These rollers are separated by spacers (often cages or retainers) to prevent them from rubbing against each other.

High Precision Emphasis: The "High Precision" designation signifies that these bearings are manufactured to extremely tight tolerances, resulting in minimal runout, high rotational accuracy, and smooth operation.

Key Features and Benefits

High Rigidity: The crossed roller arrangement allows the bearing to withstand high moment loads, radial loads, and axial loads simultaneously. This inherent rigidity is crucial for maintaining accuracy under varying load conditions.

Exceptional Rotational Accuracy: Precision grinding of the rollers and raceways, along with tight control of tolerances, ensures minimal runout and high rotational accuracy. This is vital for applications requiring precise positioning and smooth movement.

Compact Design: Compared to other bearing types with similar load capacities, crossed roller bearings offer a compact profile. This makes them suitable for applications with limited space. The XV series typically refer to extra thin profile for further space savings.

High Load Capacity: The large contact area between the rollers and raceways enables the bearing to handle significant loads in all directions.

Low Friction Torque: Precision manufacturing and roller guidance contribute to low friction torque, resulting in smooth and efficient operation.

Good Damping Characteristics: The crossed roller design provides good damping characteristics, reducing vibration and noise.

Easy Installation: Depending on the specific design, XV series crossed roller bearings can be relatively easy to install, although proper alignment is crucial.

Construction Details

Inner and Outer Rings: Made from high-quality bearing steel (e.g., SUJ2, SAE 52100, or equivalent) that is hardened and ground to precise dimensions. Often, the rings are separable to facilitate installation.

Rollers: Precision-ground cylindrical rollers made from hardened bearing steel.

Spacers/Cage/Retainer: These separate the rollers and prevent them from rubbing together. Materials can include:

Steel cages: Offer high strength and durability.

Resin cages (e.g., polyamide): Provide quieter operation and reduced friction.

Mounting Holes/Features: XV series bearings are often designed with integral mounting holes or features in the inner and outer rings to simplify installation and secure positioning.

Common Applications

XV Series high precision crossed roller bearings are well-suited for applications requiring high accuracy, rigidity, and load capacity in a compact space. Here are some examples:

Robotics: Robot joints, rotary actuators, and precision positioning systems.

Machine Tools: Rotary tables, spindles, and indexing heads.

Medical Equipment: CT scanners, MRI machines, and surgical robots.

Semiconductor Manufacturing Equipment: Wafer handling systems, inspection equipment, and precision stages.

Optical Instruments: Telescopes, microscopes, and measuring instruments.

Aerospace: Guidance systems, actuators, and precision mechanisms.

Radar Systems: Antenna positioning

XV Series Specific Considerations

"XV" Designation: While not universally standardized, the "XV" series often refers to a specific dimensional profile characterized by:

Extra Thin Section: These bearings are designed to be very thin radially, minimizing the space they occupy.

Compact Outer Diameter: Often has a smaller outer diameter compared to other series with similar bore sizes and load ratings.

Preload: Many high-precision crossed roller bearings, including the XV series, are preloaded during assembly. Preload improves rigidity, reduces backlash, and enhances rotational accuracy. The level of preload should be carefully selected based on the application's requirements.

Lubrication: Proper lubrication is essential for long bearing life and optimal performance. The recommended lubricant type and lubrication intervals will depend on the application and operating conditions. Grease is common, but oil lubrication may be preferred for high-speed applications.

Mounting Precautions: Correct mounting procedures are critical to avoid damaging the bearing and ensuring optimal performance. Proper alignment, appropriate mounting forces, and clean mounting surfaces are essential. Refer to the manufacturer's recommendations for specific installation instructions.

Advantages of Using XV Series High Precision Crossed Roller Bearings

Improved Accuracy: Contributes to higher positioning accuracy and repeatability.

Increased Rigidity: Provides greater stability and resistance to deflection under load.

Reduced Vibration and Noise: Offers smoother and quieter operation.

Extended Bearing Life: With proper lubrication and maintenance, these bearings can provide a long service life.

Space Savings: The compact design allows for smaller and more efficient machine designs.

How to Select the Right XV Series Crossed Roller Bearing

Load Requirements: Determine the maximum radial, axial, and moment loads that the bearing will experience.

Speed Requirements: Consider the operating speed of the bearing.

Accuracy Requirements: Specify the required rotational accuracy and runout.

Space Constraints: Determine the available space for the bearing. This is a key factor in selecting the XV series.

Operating Environment: Consider the operating temperature, contamination levels, and other environmental factors.

Preload Requirements: Determine the appropriate level of preload for the application.

Life Requirements: Estimate the desired bearing life.

Consult Manufacturer's Catalogs and Specifications: Refer to the manufacturer's catalogs for detailed specifications, load ratings, dimensions, and other relevant information.