High Precision Angular Contact Ball Bearings

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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		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 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)		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. 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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