How should IKO imported bearings be selected? The following are the factors that should be considered when selecting the model.
In fact, when considering the limit speed of IKO bearings, not only the type of IKO bearings should be taken into account, but sometimes the components of the shaft bearing, such as the material, form print design and technological factors of the cage, are also closely related to the sliding friction inside the bearing, the storage and maintenance of lubricants, the stability of the rolling body operation, etc. Sometimes it will become the key to whether the bearing can reach the limit speed. The service life requirements and reliability requirements of bearings are considered uniformly. The reliability coefficient is usually 90%, which means that in a large number of IKO bearings operating under the same working conditions, 90% of bearings still maintain normal state when they reach the predetermined working life L10. If you want to achieve higher reliability, such as 96%, you must reduce the required life of IKO bearings, such as the life of L10 must be reduced to L4. For the spindle bearing, the highest requirement is that the service life of the whole machine is the same or slightly higher, and the lowest requirement is that the service life is longer than the overhaul period of the spindle parts. In fact, the comprehensive consideration scheme which can not only meet the performance requirements of the main engine but also not cause the spindle system to be too large and economically more cost-effective is used. For most machines, There are fairly successful precedents to look at.
It should be emphasized that the selection calculation should also consider the failure forms of IKO bearings, as well as wear, lubrication failure and fretting abrasion, among which the wear life must be checked, and other failure forms must also be considered if involved.
The expected fatigue life and wear life of IKO bearing are not only related to lubrication, but also directly related to the cleanliness of the installation site of bearing, bearing itself and the lubricant used by IKO bearing, as well as the form and effect of sealing. The rated life of the selected IKO bearing must be adapted to the conditions of lubrication, cleanliness and sealing provided. And improving these conditions can also improve the actual service life of IKO bearings.
When considering the load factor, it should be noted that the life of the bearing is more sensitive to the load than the speed. Therefore, for the multi-stage transmission shaft, if possible, it is appropriate to put the larger deceleration in the later series; For the spindle bearing, if possible, the distance between the acting point of external load and the bearing fulcrum should be appropriately adjusted to reduce the load of the spindle IKO bearing, and the load transmitted to the spindle IKO bearing should be stable to avoid impact and vibration, which requires the shape and position precision of the mounting part of the bearing to be high enough, and the clearance and fit selection of the IKO bearing should be correct. Bearing installation accuracy is good.