Rotary table bearing is a kind of large special structure bearing that can bear large axial load, radial load and overturning moment at the same time. Generally, it has installation holes, lubricating oil holes and sealing devices, which can meet the different needs of various hosts under different working conditions. In addition, the rotary table bearing itself has the characteristics of compact structure, convenient guide rotation, simple installation and easy maintenance.
The special coating can maintain the performance of the bearing. Although the equipment has long durability by spraying special paint or oxidation treatment on the outer surface, the common rust prevention method is chromium plating (TDC) or nickel plating.
Most bearing failures are caused by improper lubrication or impurity contamination. Grease spillage is acceptable in many construction equipments (with or without sealing devices), but grease leakage is not allowed for other applications, such as robots, positioning devices and control devices. In many applications, grease leakage will affect product quality and cause safety problems.
The rolling elements are usually separated by isolation blocks. This structure can maintain the stability of motion, so it is widely used. Special ball or roller spacers are required for special applications. For bearings installed on horizontal shafts or continuously rotating generators and bearings used in occasions with high requirements for positioning and reliability, strip combined cages can be used to make the rolling elements in the correct circumferential position.
In many cases, gear teeth can be machined on the inner or outer ring of the bearing to simplify the structure of the drive system. In order to avoid problems, it is good to seek the help of gear experts when determining the structure of the drive system.
The rotary table bearing is mainly connected with the base and rotating parts by bolts. Therefore, the number, diameter, length and accuracy of bolts, especially installation, are very important. Not only the arrangement of bolts is different in different applications, but also the inner ring and outer ring are different.