Introduction：

Angular contact ball bearing have high limit rotational speed, they can carry radial load and axialload simultaneously, they cal also withstand purely radial load. The axial load carrying capacity dependson the magnitude of contact angle and increases with increasing contact angle. 

An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, and dentistry equipment, the centrifugal forces generated by the balls changes the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to their low density (40% of steel). These materials significantly reduce centrifugal force and function well in high temperature environments. They also tend to wear in a similar way to bearing steel—rather than cracking or shattering like glass or porcelain.

Angular contact ball bearing have high limit rotational speed, they can carry radial load and axialload simultaneously, they cal also withstand purely radial load. The axial load carrying capacity dependson the magnitude of contact angle and increases with increasing contact angle.

 Structures

1. Separable angular contact ball bearings

The inner ring and outer ring of this type of bearings cannot be separated and comprises following structures:

Contact angle *=15°, counter bore on outer ring, 7000C type

Contact angle *=25°, counter bore on outer ring, 7000ACtype

Contact angle *=40°, counter bore on outer ring, 7000B type

2. Four-point contact ball bearings

This type of bearings is separable bearings. Whereof, QJ000 type has two piece inner ring and QJF000 type has two piece outer ring. Their contact angles are same as 35°. When received no load or pure radial load, the steel balls of the ball bearing contact with the four points of the rings. Besides the steel balls perform a two point contact with the ring when it is received a pure axial load. In addition, besides the axial load from both directions, this kind of bearing can take torque-load as well.

3. Double row angular contact ball bearings

This kind of bearings can accommodate radial loads as well as axial loads acting in both directions; they can also take torque load. They can restrain the axial displacement from both directions of the shaft or housing; the contact angle is 30° (or 40°).

Cage material

Angular contact ball bearings generally adopt pressed steel cages or copper solid cages. Double-row angular contact ball bearings generally adopt copper solid cages.

Sealing solutions

  Bearings sealed on both sides are lubricated for the life of the bearing and should not be washed or relubricated. The bearings are considered virtually maintenance free. If they are to be hot mounted, an induction heater should be used.      

we do not recommend heating capped bearings above 80 °C (175 °F). However, if higher temperatures are necessary make sure that the temperature does not exceed the permissible temperature of either the seal or grease, whichever is lowest. During start up, grease may leak at the inner ring. For bearing arrangements where this would be detrimental, special design steps must be undertaken. 

ABOUT US

Luoyang De Run Precision Machine Tool Bearings Co., Ltd. (DRZ), is a professional company in developmentand produce all kinds of precision machine tools bearings, apply for precisionmachine tool and precision transmission parts. 

Our company developed'machine tool spindle with precision double row cylindrical rollerbearings series' identified by the Henan provincial science and technologydepartment as a high-tech products, Our company have been identified ashigh-tech enterprises.Luoyang De Runprecision Machine Tool Bearings Co., Ltd. (DRZ), build in 2001 . DRZ andLuoyang Bearing Research Institute(ZYS) has establish close cooperativerelationship, DRZ Luoyang Bearing Research Institute(ZYS)’s precision bearingsproduction base factory. Henan province science and Technology Departmentidentified as high and new technology products. Registered capital of thecompany of 120 million Yuan, capital assets more than 300 million Yuan, coversan area of 18000 square meters, construction area more than 8500 square meters,DRZ own more than 200 sets of precision bearings processing equipment andtesting equipment ,with  group of highquality production and development of human resources, with strong ability todevelop new high tech products, has  developed precision cylindrical roller bearings high precision high speed angular contact  bearings  double direction angular contact thrust ball bearings Ball Screw Support Bearings tapered roller bearings 6 major series precision machine tool spindle bearings more than 280 varieties .

Our company  located in Luoyang high tech Development ZoneHua Xia Road, Transportation is convenient with beautiful environment. Thecompany take the customer as the focus ,has established a perfect qualityassurance system, which has passed the ISO9001:2000 international qualitysystem certification in 2002. The company  have advanced processing equipment and testingequipment, establish and improve the strictly quality assessment rules andregulations. Annual production of various types of bearings about 2000000 PCS ,the gross annual value about 50000000 Yuan. Products sold in all the provincesand cities in china, applied for all kinds of precision machine tools, latheCNC, CCNC machine tools, precision machinery, automotive, spindles,constructionmachinery, transport machinery, agricultural machinery enterprises. DRZ hasbecome a shining pearl among the bearing industry.'Sincere andpragmatic, pioneering and innovative' is the soul of the company'sbusiness, 'customer first, reputation first, service first' is thecompany's business objectives. 

Company with a unique management ways as aleader, to promote the efficient operation of the enterprises, with a uniquesystem, the implementation of the intensity, reach new level of management. DRZbases on 'Human-oriented ', To promote Unity, integrity,dedication as team spirit. to focus on customers  , respect customers, sincere service, sincerefriends with customer.DRZ bearingsstrictly follow the ISO9001: 2000 quality management system standard toestablish a complete set of quality management system, integrate with theinternational practice of working mechanism. DRZ bearings steps to greaterinternational market established good foundation. Let us stride forward thehopeful and challenge future together hand in hand,Share together oncoming infinite scenery.