SKFbearing tolerancechart pdf

SKF bearing tolerance classes and the corresponding values for certain tolerance characteristics are specified in ISO 492 (for radial bearings) and ISO 199 (for thrust bearings). In 2014 these standards were aligned with general ISO GPS (Geometrical Product Specification) standards such as ISO 1101 and ISO 5459.

The bore and outside diameter variation tolerances tVdsp and tVDsp for metric radial bearings vary depending on the diameter series to which the bearing belongs. To determine the diameter series, refer to SKF bearing designation.

CLN class tolerances for SKF metric tapered roller bearings. Tolerance class CLN is in accordance with ISO tolerance class 6X.

Bearing tolerance tablepdf

For tolerance information about each bearing type, refer to Tolerances in the relevant product section. Bearings with higher accuracy than Normal are typically identified by a designation suffix for the tolerance class.

Bearingodtolerancechart

The tolerance symbols that we use are in line with ISO 492 and ISO 199 and are explained in the tables as follows. The symbols normally refer to dimensional tolerances, only Kia, Kea, Sd, SD, Sia and Sea refer to geometrical tolerances.

The dimensional and running accuracy of SKF rolling bearings has been standardized internationally. In addition to the Normal tolerances, the ISO standards also cover closer tolerances, such as:

For special applications like machine tool spindles, SKF also manufactures bearings with higher accuracy. These include the P4, P4A, PA9A, SP and UP tolerance classes.