SKF Bearing 7221 ACD/HCP4A

Product description of SKF Bearing 7221 ACD/HCP4A

SKF Bearing 7221 ACD/HCP4A, It belongs to SKF Bearing > Super-precision bearings > Angular contact ball bearings > Super-precision.SKF Bearing 7221 ACD/HCP4A, SKF manufactures super-precision angular contact ball bearings for shaft diameters from 6 to 360 mm. Application requirements vary, and as a result, the SKF assortment of super-precision angular contact ball bearings includes four ISO dimension series, in numerous executions. The wide selection of designs and variants enables them to be incorporated into virtually every machine tool application as well as other applications where precision bearings are required.

SKF Bearing 7221 ACD/HCP4A, Single row SKF super-precision angular contact ball bearings are non-separable and, like all angular contact ball bearings, have raceways in the inner and outer rings that are displaced relative to each other in the direction of the bearing axis. This means that in addition to radial loads, these bearings can also accommodate axial loads in one direction. Radial loads induce axial forces in these bearings that need to be balanced by counter-forces. An angular contact ball bearing is, therefore, always adjusted against a second bearing or used in sets.

The ring shoulders can have a different height on one or both bearing rings. Every bearing has the largest possible number of balls, which are guided by a window-type cage. The SKF assortment of super-precision angular contact ball bearings includes bearings in the following dimension series: Ultra light 718 series Extremely light 719 series Light 70 series Robust 72 series

SKF Bearing 7221 ACD/HCP4A, The cross sections of the four bearing series are compared for the same bore and same outside diameters. Each bearing series has characteristic features that make it particularly suitable for certain bearing applications.

Super-precision angular contact ball bearings are manufactured with the following contact angles (fig. 3): A 15° contact angle, designation suffix C A 25° contact angle, designation suffix AC For S70 W series bearings, the contact angle is 18° (designation suffix F). For other series, bearings with an 18° contact angle (designation suffix F), are available on request. A larger contact angle provides a higher degree of axial stiffness and a higher axial load carrying capacity. However, speed capability, radial stiffness, and radial load carrying capacity are reduced.

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