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High Precision Angular Contact Ball Bearings

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.

Description

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70series angular contact ball bearing

72series angular contact ball bearing 


718series angular contact ball bearing


ZYS precision angular contact ball bearings performance

ZYS single row angular contact ball bearings can bear radial load and one direction axial load. And radial loads produce axial forces in these bearings. 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 sets with three, four and even five bearings. Angular contact ball bearings have higher limited speed,


1. Contact angles

ZYS precision angular contact ball bearings with15° (C)and 25°(AC)contact angular. As for the angular contact ball bearings,the bigger of the contact angle is,the greater the axial load capacity is,The bearing with 15° contact angle is used when the high speed and light axial load are needed, and the 25° contact angle bearing should be adopted on the contrary. The paired use can bear both axial load and radial load or synthetic 


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 turn


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

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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)

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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)

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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)

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H719 C-DL
H719AC-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)

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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)

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B70 C
B70 C/HQ1

B70 C:10~60mm
B70 C /HQ1:10~60mm

Super speed;
High rigidity;
Suit for oil mist lubrication


3. Application:

•Machine tool spindle

•Robot technology

•high-frequency motor

•gas turbine

•centrifuge

•small-size automobile front wheels

•differential pinion shaft 


4. Advantages:

The inner ring ,outer ring and rolling element are made in high carbon chromium bearing steel,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. 


5.The principles of selecting precision bearings

ZYS has developed and produced various kinds and structures of high-speed precision bearings, each of which has special working conditions. Seleting different types and structures should depend on specific working conditions. When choosing bearings, the following properties should be taken into consideration. 

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The (1) 0 diameter series bearings are most usually used among angular contact ball bearings, cylindrical roller bearings, double direction angular contact thrust ball bearings and tapered roller bearings for high-speed precision machine spindle.

As for the angular contact ball bearings, if the radial space in mounting position is limited or the required speed of spindle is higher, (1) 0 or 19 diameter series are recommended, and even 18 diameter series; if spindle supports large load, speed is not quite high and mounting space is not limited, the (0) 2 diameter series are preferred.

The greater the axis diameter of spindle is, the higher the rigidity becomes. To improve the bearing rigidity is to increase the number of balls, which is more favorable than increasing the ball diameter.

Running accuracy of bearings directly determines the rotation of machine tools and the machining accuracy. The radial runout of inner ring is particularly important. The precision of spindle and housing must be matched with the precision of their matching bearings. 

Among ZYS high-speed precision bearings, the standard precision level of angular contact ball bearings and ball screw support bearings is IS04 (equivalent to American Bearing Manufacturers Association ABEC7 level); For cylindrical roller bearings and double direction angular contact thrust ball bearings, the standard precision level is SP. If more precise bearings are needed, we can provide angular contact ball bearings and ball screw support bearings on P4A level (dimensional accuracy is equivalent to IS04, running accuracy is higher than the IS04 level), ultra-precision bearings on IS02 level (equivalent to ABEC9 level) and double row cylindrical roller bearings and double direction angular contact thrust ball bearings on UP level, the higher precision level.


6.Application

For the high-precision bearings, 18,19, (1) 0 dimensional series in particular, the bearing ring thickness is thin, so the fitting condition, when the bearing is assembled to spindle and housing, has a significant impact on the running accuracy, internal clearance or preload of the bearing. Therefore, not only the bearing should have a higher dimensional accuracy, but its matching spindle diameter and housing bore should also have the corresponding high dimensional accuracy and surface quality.

Luoyang Bearing has been engaged in high precision angular contact ball bearings since 1958, and we are known as one of the leading bearing manufacturers and suppliers for our quality products and excellent services. Please rest assured to buy the good products from our factory.

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