Ball Bearing, Precision Angular Contact
Caution
Product Description
Accuracy grade 4 and 5 precision angular contact ball bearings.
Drawing
Product features details
Structure and features
Angular Contact Ball Bearings are non-separable bearings, and the straight line connecting the contact points between the balls and the inner and outer rings has a certain angle (contact angle) with respect to the radial direction (see Fig. 1). The contact angle and contact angle symbol are shown in Table 1.
A radial load and a unidirectional axial load can be applied. Also, when a radial load acts, an axial component force is generated, so 2 pcs. are generally used facing each other. Table 2 shows Angular Contact Ball Bearings, and Table 3 shows Combined Angular Contact Ball Bearings.
Please refer to Precision Rolling Bearing (CAT.No.2260/J) for bearings with a contact angle of 15° and bearing accuracy of JIS Class 5 or higher.
Fig. 1
Table 1 Contact angle and contact symbol
| Contact Angle | 15° | 30° | 40° |
|---|---|---|---|
| Symbol of contact angle | C | A1) | B |
*1) Contact symbol A is omitted.
Table 2 Classification and characteristics of Angular Contact Ball Bearing
| Classification | Features |
|---|---|
| Standard type | ·The bearing series includes 79, 70, 72, 72B, 73 and 73B. ·The contact angles are 30° and 40° (with B). ·The standard retainer type depends on the bearing model. |
Table 3 Combination type and characteristics of Combined Angular Contact Ball Bearings
| Combination Type | Features |
|---|---|
| Bottom combination (DB) | ・ It can receive radial load and axial load in both directions. ·Since the distance l between the points of action of the bearing is large, the load capacity of the moment load is large. ·The allowable tilt angle is small. |
| Front combination (DF) | ・ It can receive radial load and axial load in both directions. ·The distance l between the points of action of the bearing becomes smaller, and the load capacity of the moment load is small. ・ The permissible tilt angle is larger than the back combination. |
| Parallel combination (DT) | ·Can receive radial load and unidirectional axial load. ·Since 2 pcs. receive an axial load, a large axial load can be received. |
Since it is manufactured as a set to adjust the internal clearance or preload of the bearing, bearings with the same product number must be used in combination.