Universal Combinations Table 3 Combinations and Codes of Bearings Combinations and Codes of Angular Contact Ball Bearings Remarks: Page A156 [Supplementary Codes of Bearings Used by NSK] is excerpted so that the set preload can be achieved regardless of the combination of the same type of bearing. And control the width difference between the front and the back and make them equal during manufacture, this is the universal combined bearing. At this time, in order to avoid misunderstanding the bearing installation direction and obtain the correct combination, a V-shaped mark is made on the outer diameter surface of the outer ring of a single bearing. The direction of the tip of the V-mark arrow indicates the direction of the axial load (contact angle) applied to the inner ring. Front width difference f u003d back width difference b Therefore, it is suitable for various combinations. DB combination back width difference 2u003d2b (u003d2f) can get the set preload DF combination front width difference 2u003d2f (u003d2b) can get the set preload DT combination front width difference fu003dback The width difference b is the same as the usual DT combination. There is no clearance between the DTs. NSKHPS angular contact ball bearings NSKHPS angular contact ball bearings have better load capacity, higher limit speed and accuracy. The universal combination is the standard. (a) Helps reduce the operating cost of industrial machinery by extending the service life. By optimizing the bearing internal design and unique material technology, the bearing life is extended by 90% compared with the original product. Therefore, it helps to reduce maintenance frequency and running cost. In addition, under the condition of the same set life, the miniaturization of the bearing is realized, which contributes to the miniaturization and energy saving design of the machine. (b) Contribute to the realization of high-speed industrial machinery by increasing the limit speed. By optimizing the internal design of the bearing and precision machining and manufacturing technology, the limit speed of the bearing has been increased by 15%-20% compared with the original product. Therefore, the speed-up of the industrial machine is realized, thereby contributing to the improvement of the work efficiency. (c) The universal combined bearing is used as a standard inventory, which is convenient for accurate positioning. Precision machining and manufacturing technology are used. The bearing rotation accuracy reaches P5 level, and the dimensional accuracy reaches P6 level. The angular contact ball bearings can be freely combined for accurate positioning. Therefore, industrial machinery assembly and maintenance are facilitated, while contributing to the realization of high efficiency of the machinery. (d) There are 3 kinds of cages suitable for different purposes, which help to improve the reliability of industrial machinery. NSK has 3 kinds of cages to choose from: nylon 46 plastic cage with excellent high temperature strength (photo 1), L-PPS plastic cage with excellent oil and chemical resistance (photo 2), and high-reliability copper alloy machined Cage (photo 3). Therefore, the bearing contributes to the reliability required for various industrial machines.