Four Point Contact Ball Slewing Bearing(VA/VI/VU Series)

INA Four Point Contact Bearings Series VU（Without Gear Teeth Type）

LYNB Four Point Contact Bearing Series VU are units comprising inner and outer rings with a closing plug and securing dowel, rolling elements, spacers, contact seals and lubrication nipples. It has bearing outer rings and inner rings with through holes. Four Point Contact Bearings can support axial, radial and tilting moment loads, but cannot be subjected to load as high as crossed roller bearings.

▲ The design’s of all these Four Point Contact Bearings Series VU are based on standard structures; LYNB can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNB Technical Center if you need any assistance in this area.  

INA Four Point Contact Bearings Series VI （Internal Gear Teeth Type）

INA Four Point Contact Bearing Series VI are units comprising inner and outer rings with a closing plug and securing dowel, rolling elements, spacers, contact seals and lubrication nipples, with gear teeth on the inner ring. It has bearing outer rings with through holes and bearing inner rings threaded holes for fixing screws. Four Point Contact Bearings can support axial, radial and tilting moment loads, but cannot be subjected to load as high as crossed roller bearings.

▲The design’s of all these Four Point Contact Bearings Series VI are based on standard structures; LYNB can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNB Technical Center if you need any assistance in this area.

INA Four Point Contact Bearings Series VA (External Gear Teeth Type)

INA Four Point Contact Bearings Series VA are units comprising inner and inner rings with a closing plug and securing dowel, rolling elements, spacers, contact seals and lubrication nipples, with gear teeth on the outer ring. It has bearing inner rings with through holes and bearing outer rings threaded holes for fixing screws. Four Point Contact Bearings can support axial, radial and tilting moment loads, but cannot be subjected to load as high as crossed roller bearings.

▲The design’s of all these Four Point Contact Bearings Series VA are based on standard structures; LYNB can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNB Technical Center if you need any assistance in this area.  

VA/VI/VU series four-point contact bearings are a type of rolling-element bearing designed to handle axial and radial loads simultaneously. They are characterized by their unique internal geometry that allows them to support loads in all four directions. Here's a more detailed introduction:

Key Features and Characteristics of VA/VI/VU Series Four-Point Contact Bearings

Four-Point Contact: The inner and outer rings have raceways designed to create four distinct contact points with the balls when under load. This design enables the bearing to accommodate axial loads in both directions (thrust loads) and radial loads simultaneously.

Single-Row Design: Typically, VA series bearings are single-row bearings, which means they have one row of balls.

High Load Capacity: Their design allows them to handle significant combined loads, making them suitable for applications where both axial and radial loads are present.

Compact Design: They offer a compact design compared to using separate thrust and radial bearings, saving space and reducing the number of components needed.

Accommodates Misalignment: They can tolerate some degree of misalignment due to the four-point contact design, although excessive misalignment should be avoided to prevent premature wear.

Applications

They are commonly used in a variety of applications, including:

Turntables

Machine tools

Robotics

Pumps

Gearboxes

Medical equipment

Automation systems

Aerospace applications (in specialized, high-precision versions)

Radar Equipment

Materials: Typically made of bearing steel (e.g., SAE 52100 or equivalent). The cages can be made of steel, brass, or polymers depending on the specific application requirements.

Cage Designs: Various cage designs are used, including:

Machined Brass Cages: Offer high strength and are suitable for higher speeds and temperatures.

Steel Cages: Provide good strength and wear resistance.

Polymer Cages (e.g., Polyamide): Offer low noise, good vibration damping, and can operate without lubrication in some applications.

Advantages of Using VA Series Four-Point Contact Bearings

Combined Load Capacity: Their ability to handle both axial and radial loads in a single bearing simplifies designs and reduces component count.

Space Saving: Their compact design makes them ideal for applications where space is limited.

Misalignment Tolerance: They can accommodate some misalignment, reducing the need for highly precise mounting.

Design Flexibility: They allow for more flexible design options in applications where combined loads are present.

How to Select a VA Series Four-Point Contact Bearing:

When selecting a VA/VI/VU series four-point contact bearing, consider the following factors

Load Requirements: Determine the axial and radial loads that the bearing will be subjected to.

Speed: Consider the operating speed of the application.

Temperature: Determine the operating temperature range.

Misalignment: Estimate the degree of misalignment that the bearing will need to accommodate.

Lubrication: Select the appropriate lubrication method and lubricant type.

Space Constraints: Consider the available space for the bearing.

Accuracy: Determine the required accuracy and precision of the bearing.

Operating Environment: Consider if the bearing will be exposed to corrosive materials or extreme conditions.

Bearing size: Inner diameter (d), outer diameter (D) and width (B) must be specified.

Clearance: Internal radial clearance of the bearing.