How to choose and angular contact ball bearing?

Angular contact ball bearing high revolution because of the job, workplace requirements processing precision is high, with high precision. Complex structure at the same time, lead to code in a lot of parameters need to indicate, this makes many users are confused about what to do, don't know what to buy bearings. Many users once bearing appear problem, but always complain about the bearing quality is bad, in fact, are often selection problem, if the quality of angular contact bearings itself will be a problem, such as: accuracy has reached the parameter requirements, so, if the bearing failure quickly, can definitely say that is selection problem or installation problem. Angular contact ball bearing contact Angle generally divided into 15 degrees, 25, 40, 60 ( Thrust angular contact) 。 Matching approach: a single bearing, that is, a shaft on the head of a bearing that way, there is no matching, also there is no pre-tightening force requirements. Two or more bearing group together, there is a matching way, there are generally two pairs, such as: DB, DF, DT ( HR code, for example) ； Three pairs, such as: TBT, TFT, TT, four pairs, such as: QBC, QFC, QTQBT, QFT, there are five pairs. Pre-tightening force: to strengthen the rigidity of shaft at high speed, at the same time, considering the service life of bearing, with diagonal contact ball bearing, often need to preset a certain axial load, the load is the pre-tightening force, generally divided into three, light load, the load and overload; When bearing is running, working load will offset the preloading load, thus reduce the load on the rolling element bearing, on the basis of guarantee the shaft rigidity and prolong the service life of bearing as soon as possible. Level of accuracy: precision grade is different, the bearing level limit rotational speed difference, at the same time, the machining precision of equipment also have differences, motorized spindle and precision machining center used more P4 level or P2 level bearing, and general lathe, milling machine, etc. , according to the requirements of the machining accuracy, tend to choose the P5, P4 bearing level; Above all, procurement staff to the bearing manufacturers in order to clear the following points: 1, bearing structure, H structure? B（ FAG） Structure? B（ Domestic) Structure? （ In the industry tend to use big ball or small ball to distinguish, it is also a good method) Open? With seal? Steel ball? Ceramic ball? 2, the contact Angle: C? E？ B？ 3, a single set of use or matching use? If it is matching to use. Then, a few pairs? What's the level of prestressing force? 4, precision grade? With end users to clear up these, and then place the order purchase, so, the success of the bearing use would not be a problem. Bearing more information please call our jiaxing bearing group sales co. , LTD.