QIBR slewing bearing is large-scale bearing, which is used for supports of large equipment, such as excavator, crane. It can bear axial force, radical force and overturning moment. this kind of bearing is installed horizontally, used for transferring axial force, radical force and large overturning moment. Generally speaking, slewing bearing can be designed as ball bearing, and also roller bearing. The slewing bearing shown in the illustration is sealing four contacts ball bearing. The characteristics of the four contacts ball bearing are large bearing capacity and small sectional area. Cross roller bearing also belongs to the slewing bearing.

Outer gear single row four contacts ball slewing bearing (installation holes at inner ring and outer ring are customizable)

Inner gear single row four contacts ball slewing bearing (installation holes at inner ring and outer ring are customizable)

In which row numbers can be customized to be two.

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.