Deep groove ball bearing is the most representative rolling bearings and widely used. It is applied for high speeds and even super-high speed revolutions, with characteristics of extreme durability and maintenance-free. Deep groove ball bearing has characteristics of small friction coefficient, high limit rotation speed, simple structure, low manufacturing cost, easy achieving high manufacturing precision, various dimensions and models. It is applied in precision instruments, low noise motors, automobiles, motorcycles and general machinery industry, and it is the most widely used types of bearings in the machinery industry. The bearing mainly bears radial load and can also take certain axial load.

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.

Precisions of rolling bearing (mainly) include dimension precision and rotation precision.

Dimensional precision (items related to shaft and shell installation)

1. Allowable deviation of inner diameter, outer diameter, width and assembly width

2, the allowable limit value of the chamfer size

3, the allowable variation of the width

Rotation precision (items related to runout of the rotating body)

1. Allowable radial runout and axial runout of the inner and outer rings

2, the inner ring allows horizontal runout

3. Allowable variation of outer diameter surface inclination

Deep groove ball bearings GB307 Level 0 Level 6 Level 5 Level 4 Level 2

Angular contact ball bearings 0 level 6 level 5 level 4 level 2 level

The noise level of the bearing is divided into Z1, Z2, Z3, Z4 (the higher the level, the better quality is).

The vibration level of the bearing is divided into V1, V2, V3, V4 (the higher the level, the better quality is).

High precision deep groove ball bearing