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High precision angular contact ball bearings
High precision angular contact ball bearings

High precision angular contact ball bearings

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High precision angular contact ball bearings


    • ZYS angular contact ball bearings can bear radial load and one direction axial load. When the bearing withstands radial loads, axial force will be generated on inner ring. Therefore, the single-row angular contact ball bearings are often used with other bearings which can withstand axial load in the opposite direction. That is, angular contact ball bearings are commonly used in pair, or in groups with three, four and even five bearings.

      1. Contact angles
      The contact angles of ZYS angular contact ball bearings for machine tool are 15° and 25°. The bearing with 15° contact angle is used when the high speed and light axial load are needed, while the 25° contact angle bearing should be adopted on the contrary.

      2. Four dimension series
      The precision angular contact ball bearings for spindles have four dimension series, 718, 719, 70 and 72. With the same inner diameter, the outer diameter and the width of 718, 719, 70 and 72 increase in sequence.

      Table 1. The types and performance of ZYS angular contact ball bearings

      ZYS angular contact ball bearing series Structures Dimension series Bore size range Performance
      High precision angular
      contact ball bearing
        718 C
      718 AC
      719 C
      719 AC
      70 C
      70 AC
      72 C 72 AC
      718:10~360mm
      719:8~460mm
      70: 8~380mm 72: 8~220mm
      High speed;
      Large loading capacity;
      Suit for grease
      or oil-mist lubrication
      High speed angular contact ball
      bearing(incl. hybrid ball bearing)
        H719 C
      H719 AC
      H70 C
      H70 AC
      H719 C/HQ1
      H719 AC/HQ
      H70 C/HQ1
      H70 AC/HQ1
      H719:8~220mm
      H70:8~220mm
      H719/HQ1:8~220mm H70/HQ1:8~220mm
      Super speed;
      High rigidity;
      Suit for air-oil or oil injection lubrication
      Super speed angular contact ball
      bearing(incl. hybrid ball bearing)
        HS719 C
      HS719 AC
      HS70 C
      HS70 AC
      HS719 C/HQ1
      HS719 AC/HQ
      HS70 C/HQ1 HS70 AC/HQ1
      HS719:8~220mm
      HS70:8~220mm
      HS719/HQ1:8~220mm
      HS70/HQ1:8~220mm
      Super speed
      (higher than H series);
      High rigidity;
      Suit for air-oil or oil injection lubrication
      Super speed angular contact ball bearing with
      direct lubrication(incl. hybrid ball bearing)
        H719 C-DL
      H719 AC-DL
      H70 C-DL
      H70 AC-DL
      H719 C/HQ1-DL
      H719 AC/HQ-DL
      H70 C/HQ1-DL
      H70 AC/HQ1-DL
      H719-DL:20~220mm
      H70-DL:30~220mm
      H719/HQ1-DL:20~220mm
      H70/HQ1-DL:30~220mm
      Super speed (higher than H and HS series);
      High rigidity;
      Suit for direct lubrication
      High speed sealed angular contact ball
      bearing(incl. hybrid ball bearing)
        B719 C-2RZ
      B719 AC-2RZ
      B70 C-2RZ
      B70 AC-2RZ
      B70 C-2RZ/HQ1
      B719 AC-2RZ/HQ1
      B70 C-2RZ/HQ1
      B70 AC-2RZ/HQ1
      B719-2RZ:10~220mm
      B70-2RZ:10~220mm
      B719-2RZ /HQ1:10~220mm
      B70-2RZ /HQ1:10~220mm
      High speed;
      High rigidity;
      Grease lubrication
      High speed bearings for inner diameter
      grinding spindles (incl. hybrid ball bearing)
        B70 C
      B70 C/HQ1
      B70 C:10~60mm
      B70 C /HQ1:10~60mm
      Super speed;
      High rigidity;
      Suit for oil mist lubrication

      3. Advantages:

      As an important type of machine tool bearing, ZYS angular contact ball bearing has the following advantages:

      •The chamfer arc radius of rings is reasonable, which is not only convenient to install, but also guaranteed to improve the installation precision and reduce the risk of the related parts being bumped.

      •The speed performance is outstanding.

      •Unique heat treatment process allows products to achieve the best dimensional stability and rigidity, so as to reduce wear and tear.

      •Multiple pre-load levels can help to meet different requirements for speed and system stiffness, which is more reasonable to select and use the levels.

      4. Application:

      •High-frequency motor

      •Robot technology

      •Gas turbine

      •Centrifuge

      •Small-size automobile front wheels

      •Differential pinion shaft

      •Machine tool spindle

      The use of rolling bearings on machine tools is mainly used in the following three parts: spindle, ball screw and general drive shaft.

      As the basic supporting parts of the machine tool, the spindle bearing's performance directly affects the speed, rotation accuracy, rigidity, cutting performance, noise, temperature rise and thermal deformation of the machine tool, which in turn affects the accuracy and surface quality of the machined parts. Therefore, high-performance machine tools must be equipped with high-performance machine tool bearings, especially high-speed precision CNC spindle bearings. The accuracy of the bearings used on the spindles of precision machine tools should be P5 grade and above, and for the spindle of super high-speed and high-precision machine tools such as CNC machine tools and machining centers, super precision spindle bearings with P4 grade and above should be chosen.

      ZYS spindle bearings are single-row angular contact ball bearings, with contact angle of 15°or 25°. It has been optimized in terms of design, running accuracy and materials to achieve the highest speed and excellent load carrying capacity.



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