Angular contact ball bearings can bear both radial and axial loads. It can work at higher speed. The larger the contact angle, the higher the axial load bearing capacity. The contact angle is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane. High precision and high speed bearings usually take a 15° contact angle.

Angular contact ball bearing precision levels include dimensional tolerances and rotation precision. The precision is marked from low to high as P0 (ordinary), P6 (P6X), P5, P4, P2.

High-precision high-speed angular contact ball bearings can be used in pairs to withstand axial loads in both directions. Commonly-used pairing forms are back-to-back configuration, face-to-face configuration, and serial configuration.

High-precision high rotation speed angular contact bearing (contact angle a is 15°)

Back-to-back combined angular contact ball bearing (contact angle a is 15°)

face-to-face combined angular contact ball bearing (contact angle a is 15°)

Bearing cage

The high-quality cage used by QIBR bearings ensure that the balls are evenly distributed in the bearing rings and can be rotated properly.

The cage has stamped steel wave type, stamped steel rivet type, nylon or phenolic plastic.

QIBR offers a wide range of advice and options depending on the operating conditions.

Type of lubrication

Lubricating oil is the basic lubricant for ball bearings. Previously most of the lubricating oil was extracted from petroleum. Synthetic oils are now acceptable due to improved performance, such as two lipid synthetic oils, silicones and fluorocarbon synthetic oils. In general, lipid synthetic oils have better low temperature properties, lower volatility, and better temperature characteristics and viscosity compared than petroleum refined oils. Essentially all lubricants contain additives to inhibit chemical changes, prevent metal corrosion, and improve physical properties (antifoam, etc.).

The silicone and fluorocarbon synthetic oils that adopted by QIBR have lower volatility and wider temperature/viscosity characteristics.

Service life and the rated load

The bearing life is the number of bearing rotations before the fatigue occurs on the ring or any rolling element (or the rotation time at a constant speed). However, the same set of bearings will not necessarily have the same life under the same conditions. In this case, the rated life is the number of rotations that 90% of the bearings in this group can reach or exceed before bearing weariness (or the rotation time at a constant speed). The service life of QIBR series bearings are 10%-20% longer than other bearings of the same model, through strict production process, high standard material selection, precision control.