The role of bearing cooperation and selection skills

The function of the bearing fit is to consolidate the stationary and rotating rings of the bearing with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the mounting part, thereby realizing the transfer of the load and the defined movement in the rotating state. The basic task of the system relative to the position of the stationary system. On the shaft and in the housing, the rolling bearing requires its position to be fixed in three directions: radial, axial and tangential directions. The radial and tangential positioning is achieved by the tight fit of the bearing ring. The axial positioning is only used in a few cases. The axial position is generally limited by axial limit parts such as end caps and retaining rings. Within the clearance range.

Bearings are important accessories in machinery. They can also be said to be mechanical joints. Like our humans, if there is no joint, it will not work. If people have no joints, then what is the role? Then there is no use, the machine is the same, without the bearing, the machine can not be used, so the machine is inseparable from the bearing, leaving the bearing can not survive, it is equivalent to waste. The use of bearings is very complicated. Some rolling bearings need to be used together. This general technician knows the knowledge that we generally don't know. We will introduce the use and requirements of this rolling bearing. Also know the basis of your familiarity with the bearing.

When choosing a fit, you should pay attention to the following four points:

(1) The circumferential surface of the bearing ring should have good support and uniform force to reduce deformation and fully exert the bearing capacity of the bearing.

(2) The ferrule cannot slide in the tangential direction in its mating surface, otherwise the mating surface will be damaged.

(3) The free end bearing must be compatible with the length change of the shaft and the housing bore, that is, it must have the ability to accommodate the axial position to swim within a certain range.

(4) It must be noted that the bearing is easy to install and disassemble, saving labor, time and money.

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Application range of FAG bearing crossed roller bearings

FAG bearing cross-roller bearings can withstand loads from all directions (such as axial, thrust or momentum loads). Since the FAG bearing is in contact with the outer surface of the track, the bearing is subject to load and elastic deformation is small.

This type of FAG imported bearings are commonly used in industrial robots, mission machinery and medical facilities. FAG  require high rigidity, tightness and high speed to ensure accurate position in cross-roller bearings, due to cylindrical rollers. The FAG bearings are arranged perpendicular to each other by a distance maintaining device on a 90° V-shaped groove rolling surface, so that one crossed roller bearing can withstand loads in all directions such as radial load, axial load and moment load.

The size of the inner and outer rings is minimized, and the special ultra-thin type is a small size close to the limit and has high rigidity, so it is most suitable for the joint portion or the rotating portion of the industrial robot.

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