Angular contact ball bearings can withstand both radial and axial loads.

Angular Contact Ball Bearings

Can work at higher speeds.

The larger the contact angle, the higher the axial load carrying capacity.

High precision and high speed bearings typically take a 15 degree contact angle.

Under the axial force, the contact angle will increase.

Accuracy level

Angular contact ball bearing accuracy grades include dimensional tolerances and rotational accuracy.

The accuracy is expressed from low to high as P0 (normal), P6 (P6X), P5, P4, and P2.

In addition, European and American brands also use P3, P7, P9 to indicate the accuracy level.

P3 is equivalent to the P6 level of the ISO and JIS standards, P7 is equivalent to the P4 level, and P9 is equivalent to the P2 level.

Characteristic

  1. Universal matching bearing

General purpose bearing is specially machined.

When the bearings are mounted against each other, any combination can achieve a defined internal clearance or preload, as well as an average load distribution without the use of gaskets or similar devices.

Paired bearings are used in:

When a single bearing has insufficient load carrying capacity (using a coupling configuration) or when subjected to a combined load or an axial load acting in both directions (using a back-to-back or face-to-face configuration).

  1. The basic design of the bearing (can not be used as a universal matching)

Configuration for a single bearing

The basic design of single row angular contact ball bearings is mainly used in the configuration of only one bearing in each position.

Its width and amount of protrusion are normal tolerances.

Therefore, it is not suitable to install two single-row angular contact ball bearings.

Angular Contact Bearing Type

Angular contact ball bearings are available in 7000C (∝=15°), 7000AC (∝=25°) and 7000B (∝=40°) types.

The lock of this kind of bearing is on the outer ring.

Generally, the inner and outer rings cannot be separated, and can bear the combined load of radial and axial directions and the axial load in one direction.

The ability to withstand axial loads is determined by the contact angle.

The greater the contact angle, the higher the ability to withstand axial loads.

This type of bearing limits the axial displacement of the shaft or housing in one direction.

Contact ball bearings have a high limit speed and can withstand both radial and axial loads as well as pure axial loads.

Its axial load capacity is determined by the contact angle and increases as the contact angle increases.

Single row angular contact ball bearing

Single row angular contact ball bearings can only withstand axial loads in one direction.

When subjected to radial loads, it will cause additional axial forces and must be applied to the corresponding reverse load.

Therefore, such bearings are generally used in pairs.

Double row angular contact ball bearings can withstand large radial and axial bidirectional combined loads and moment loads, mainly radial loads, which can limit the axial displacement of the shaft or casing, with a contact angle of 30 degrees.

Bearing code: 7

Paired angular contact ball bearings

Paired mounted angular contact ball bearings can withstand radial and axial bidirectional combined loads with radial loads and can withstand pure radial loads.

The series configuration can only withstand axial loads in one direction, while the other two configurations can withstand axial loads in either direction.

This type of bearing is generally selected by the manufacturer and combined into a pair of users.

After installation, there is preloading and interference, and the ferrule and the steel ball are in the axial preload state, thus improving the rigidity and rotation accuracy of the entire set of bearings as a single support.

Back-to-back configuration, the post code is DB (such as 70000/DB).

The load lines of the back-to-back matched bearings are separated from the bearing shaft.

It can withstand axial loads acting in both directions, but the load in each direction can only be absorbed by one bearing.

Back-to-back mounted bearings provide a relatively rigid bearing configuration and can withstand overturning moments.

For face-to-face configuration, the rear code is DF (eg 70,000/DF), and the load lines of the face-to-face matched bearings converge toward the bearing shaft.

It can withstand axial loads acting in both directions, but the load in each direction can only be absorbed by one bearing.

This configuration is not as rigid as back-to-back pairing and is not well suited to withstand overturning moments.

The rigidity of this configuration and the ability to withstand the overturning moment are not as good as the DB configuration, and the bearing can withstand bi-axial axial loads;

In a series configuration, the post code is DT (such as 70000/DT).

In a series configuration, the load lines are parallel and the radial and axial loads are evenly shared by the bearings.

However, the bearing set can only withstand axial loads acting in one direction.

If the axial load acts in the opposite direction, or if there is a composite load, a third bearing that is adjusted relative to the series matched bearing must be added.

This configuration also allows three or more bearings to be connected in series at the same support, but can only withstand axial loads in one direction.

Usually, in order to balance and limit the axial displacement of the shaft, the other bearing needs to be fitted with a bearing that can bear the axial load in the other direction.

Bearing code: 0

Load capacity

The following is only for the load capacity of the mating bearing, and the basic load rating and fatigue limit load given in the product table apply only to a single bearing.

*Basic dynamic load rating, standard bearings for any configuration and SKF Explorer bearings in back-to-back or face-to-face configurations

C=1, 62xC single bearing

*Basic dynamic load rating, SKF explorer bearings for series configuration

C=2xC single bearing

*Basic rated static load

Co=2xCo single bearing

*Fatigue limit load

Pu=2xPu single bearing

Structural deformation type

Double row angular contact ball bearings are characterized by the ability to simultaneously support combined loads of radial and axial loads, limiting axial displacement of both sides of the shaft.

Compared with the two-way thrust ball bearing, this bearing has a higher limit speed, a contact angle of 32 degrees, good rigidity, and can withstand large overturning moments.

It is widely used in the front wheel hub of a car (some models also use the same size double row tapered roller bearings).

There are four structural deformations of double row angular contact ball bearings:

Type A: Standard design for bearings with an outer diameter less than or equal to 90 mm.

There is no ball gap and therefore can withstand equal bidirectional axial loads.

Lightweight fiberglass reinforced nylon 66 cage with low bearing temperature rise.

Type A: Standard design for bearings with an outer diameter greater than 90 mm.

There is a ball gap on one side, equipped with a z-steel stamping cage or a brass solid cage.

Type E: It is a reinforced structure with a ball gap on one side, which can hold more steel balls, so the carrying capacity is higher.

Both sides are dust-proof and double-sided with seals.

Both the A-type design and the E-type double-row angular contact ball bearings can be equipped with dust cover (non-contact) or seal (contact) on both sides.

The inside of the sealed bearing is filled with rust-proof lithium-based grease, and the operating temperature is generally between -30 and 110 degrees.

No lubrication is required during use and no heating is required before installation.

Double row angular contact ball bearings should be installed when installing, although the bearing can withstand two-way axial load.

However, if there is a ball gap on one side, care should be taken not to let the main axial load pass through the notched side of the groove.