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Design and Lubrication of Bidirectional Angular Contact Thrust Ball Bearing

by:JNSN     2021-12-18
Two-way angular contact thrust ball bearings are high-precision bearings specially designed and produced for the machine tool industry. It can bear the axial load in the spindle of the machine tool and its external dimensions are consistent with the double row cylindrical roller bearing NN30 series (see page 166) used to support the radial load. Two-way angular contact thrust ball bearings are usually combined with double-row cylindrical roller bearings. Both have the same nominal outer diameter. This makes the processing of the bore diameter of the bearing seat easier. The outer diameter tolerance of double row angular contact thrust ball bearings can ensure that the bearing still has a certain gap after being installed in the bearing housing. Bearing design Bidirectional angular contact thrust ball bearing has a contact angle of 6 and has an axial preload. Therefore, its axial bearing capacity and rigidity are very high. This type of bearing has two series, 2344... and 2347. The 2344.. series are installed on the side of the NN30 cylindrical roller bearing with the smaller taper bore, while the 2347.. series are installed on the side with the larger taper bore. Two-way angular contact thrust ball bearing bearing design Figure 2 and Figure 3 table 2344../2347.. The relationship between the 2344../2347.. series bearings and the NN30 double row cylindrical roller bearing during assembly. The 2344 bidirectional angular contact thrust ball bearing is located on the side of the smaller taper bore of the NN30...K double row cylindrical roller bearing. The 2347 bidirectional angular contact thrust ball bearing is located on the side with the larger tapered bore of the NN30...K double row cylindrical roller bearing. Lubricated angular contact thrust ball bearings can be lubricated with grease or oil. The seat ring is provided with a lubrication groove, and a lubrication hole is opened in the middle. Lubricant is introduced between the two rows of rolling elements, and the function of bearing operation and transportation is used to achieve the purpose of lubrication. Because of this high conveying effect, this kind of bearing requires a much larger amount of lubricant than the adjacent cylindrical roller bearing. Therefore, the design needs to ensure that the oil flowing out of the thrust angular contact ball bearing cannot enter the adjacent cylindrical roller bearing. Bearing suffix code two-way angular contact thrust ball bearing 2344 24-M-SP series name 2344 mounted on the small end of the tapered shaft 2347 mounted on the large end of the tapered shaft Aperture reference code 06 6 · 5 u003d 30 mm 10 10 · 5 u003d 50 mm precision SP special Accuracy UP Ultra-precision cage M Brass cage.
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