Precision Crossed Cylindrical Roller Slewing Bearings

What a crossed cylindrical roller slewing bearings?

Crossed cylindrical roller slewing bearings are bearings for high-precision applications whose dimensions conform to ISO dimension series 18 as per DIN 616. They comprise outer rings, inner rings, rolling elements and plastic spacers. The outer ring is split and is held together by three retaining rings.

Due to the X arrangement of the crossed cylindrical roller slewing bearings, these bearings can support axial forces from both directions as well as radial forces, tilting moment loads and any combination of loads by means of a single bearing position.

As a result, designs involving two bearing positions can be reduced to a single bearing position. Crossed cylindrical roller slewing bearing are very rigid, have high running accuracy and are supplied with normal clearance, low clearance or preload. The crossed cylindrical roller slewing bearing outer rings are easily fixed to the adjacent construction using clamping rings.

LYMC designs and manufactures a variety of crossed cylindrical roller slewing bearings that can handle radial, thrust and moment loads at the same time. These compact bearings feature rollers crossed at right angles between inner and outer rings.

• Widely used in machine tools, industrial robots and medical equipment because of their high rotational accuracy.
• Roller guide options include a cage or separator as well as a full complement design. Both the cage and separator styles offer a small coefficient of friction for high-speed rotation. Full complement crossed cylindrical roller slewing bearings handle heavy loads at low speeds.
• Sealed and open designs are available. Sealed bearings incorporate synthetic rubber seals to protect against dust, dirt and grease.

• Mounting Holed Type

  Mounting holed type, high rigidity crossed cylindrical roller slewing bearings feature mounting holes on both inner and outer rings for easy installation.

  • Inseparable design integrates inner and outer ring into one structure for high rigidity and accuracy.
  • Shaft diameters range from 10 to 90 mm.

  • High Rigidity

    High rigidity crossed cylindrical roller bearings feature solid, one-piece construction for high accuracy.

    • Inseparable design integrates inner and outer ring into one structure for high rigidity.
    • Smooth rotation ensured by separators incorporated between cylindrical rollers, suitable for high rotational speeds.
    • Shaft diameters range from 20 to 300 mm.

    • Standard

      Standard crossed roller bearings feature a two-piece outer ring, bolted together to prevent separation during transport and installation.

      • Shaft diameters range from 30 to 250 mm.
      • Available in caged and full complement types.
      • CRB and CRBC are available with shaft diameters as large as 800 mm.

      • Definition of crossed roller bearings

        Crossed roller bearing is a special type bearing with split inner ring and rotating outer ring. Since the divided inner ring or outer ring is installed with rollers and cage, it is fixed with the cross roller ring to prevent separation from each other, so it is easy to install the cross roller ring.

      • Since the rollers are arranged in a cross, only one set of cross roller rings can bear loads in all directions. Compared with the conventional model, the rigidity is increased by 3 to 4 times. At the same time, because the inner ring or outer ring of the cross roller bearing has a two-part structure, the bearing gap can be adjusted, and even if preload is applied, high-precision rotational movement can be obtained. Moreover, due to its special structure, it is usually used as a joint bearing in industrial robots.
        

        Applications of crossed roller bearing:

        •Industrial robot arms, reducers

        •Precision machines( turnable table)

        •Rotation parts of Machine tools

        •Medical equipments

        • Measuring instruments

        LYMC-bearing provides high quality crossed roller bearings including THK RA, THK RB, THK RE, THK RU series, IKO CRB, IKO CRBC, IKO CRBF, IKO CRBH, INA SX, INA XU, INA XSU series and more. Custom cross roller bearings are also acceptable.