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NSK bearing cooperation and load type contact

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Generally, the types of ferrules accepted loads have the following three conditions:
1 Fixed load effect on the radial load of the ferrule; accepted by part of the ferrule raceway; and transmitted to the opposite area of ​​the shaft or NSK bearing seat; this load is called fixed load. The fixed load is characterized by The radial load vector is relatively stopped with the ferrule. The ferrule and the component radial load are not transformed or rotated at the same speed are fixed loads. The ferrule that accepts the fixed load can be loosely cooperative.
2 The rotating load effect is the radial load on the ferrule; it rotates in the circumferential direction of the raceway; it is accepted by each part in turn; this kind of load is called the rotating load.
The characteristics of the rotating load are that the radial load vector is related to the ferrule rotation. The rotating load has the following three conditions:
(1) The load direction is fixed; the ferrule is changed;
(2) the load vector rotates; the ferrule stops;
(3) The load vector rotates at a different speed than the ferrule.
3 Swing load and variable load Sometimes the direction and size of the load cannot be determined locally; for example, in a high-speed rotating machine; except that the received rotor component is a fixed direction load; there is also a rotating load caused by unbalanced mass; if this is The rotating load is much larger than the fixed load; then the component load is still the rotating load; and if the rotating load is much smaller than the fixed load; the composition load is the rocking load. The rotating load is still the rocking load; its size and direction are both It is constantly changing. In the variable working state; some ferrules can be loaded with a load but a fixed load; time is a fixed load; time is a rocking load. This load is called an indefinite load.
The swaying load and the indefinite load should be treated equally with the rotating load in cooperation; too loose cooperation will lead to cooperation surface damage.
The ferrule and the shaft or seat hole related to the rotation of the load direction; the transition cooperation or interference cooperation should be selected. The interference size is to work under the load of the NSK bearing; the ferrule is not on the cooperation surface of the shaft or the seat hole. The occurrence of "activity" is the criterion. The load is very light; or the ferrule has occasional low-speed transition under heavy load effect; the transition cooperation can be selected; at this moment, the shaft appearance should have higher hardness and smaller appearance roughness.
Regarding heavy load applications; generally, the cooperation should be tighter than in light load and normal load situations. The heavier the load; the greater the cooperative interference should be.

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