Fits for radial ball bearings
The main dimensions of radial ball bearings have tight tolerances. In order to achieve a good bearing seat while at the same time being easy to assemble, the outside diameter of the shafts or the inside diameter of the bores are tolerated according to the fit system. The recommended shaft and bore fits are given below.
Recommended fit for the shaft
for light loads (P ≤ 0,05 C)
for normal to high loads (P > 0,05 C) D w ≤ 10 mm js5 10 < D w ≤ 17 mm js5 j5 17 < D w ≤ 100 mm j6 k5 100 < D w ≤ 140 mm k6 m5 140 < D w ≤ 200 mm m6 200 < D w ≤ 500 mm n6 D w > 500 mm p7 C = basic dynamic load rating | P = equivalent dynamic bearing load Recommended fit for the bore
Point load on the outer ring, e.g.:
Heat supply through the shaft none G7 Light to normal loads (P ≤ 0,1 C) none H8 High loads (P > 0,1 C) none H7 Indefinite load direction Light to normal loads (P ≤ 0,05 C) none J7 Normal to high loads (P > 0,05 C) Only for unsplit housings K7 High impact loads Only for unsplit housings M7
Circumferential load on the outer ring, e.g.:
Small and variable loads (P ≤ 0,05 C) Only for unsplit housings M7 Normal to high loads (0,05 C < P ≤ 0,1 C) Only for unsplit housings N7 Very high loads (P > 0,1 C) Only for unsplit housings P7 C = basic dynamic load rating | P = equivalent dynamic bearing load
This information is to be seen as a recommendation. The data has been carefully compiled from various sources, but no guarantee is given for any information.