Turntable bearing friction torque
The frictional torque MRL of the bearing is mainly affected by the viscosity and quantity of the lubricating oil and the bearing preload. The viscosity and quantity of the lubricant depend on the lubricant grade and operating temperature; the preload of the bearing depends on the bearing condition, the mounting fit, the geometric accuracy of the shaft and the housing, the temperature difference between the inner and outer rings, and the tightening torque of the bolt. And installation status (the L-shaped inner ring of the bearing is single-sided or double-sided axial support, etc.). Any deviation of the mounting bolt tightening torque has a negative impact on the preload and friction torque, so please pay attention during the installation process.
The friction torque MRL in the dimension specification table refers to the measured value under lubrication (measuring speed 5r/min), which may be different from the actual assembly.
For the YRT standard series, it must be noted that as the speed increases, the friction torque will increase by 2 to 2.5 times, whereas the YRTS high speed series does not. For the ZKLDF series, it must be taken into account that the starting friction torque may be 1.5 times the value MRL in the dimension specification table.
We can provide turntable bearings with lower friction torque according to customer requirements to adapt to low torque service conditions.
