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Product information

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Recommendations

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Product data Page ................4 Tolerances Page ..............57 Fig shows schemat-ically the relative positions of these in relation to the bore and outside diam- eters of the bearings. The recommend- ed tolerances for • the shaft seating are given in Table

Table 1

Recommended fits ,and• the housing bore in

Operating conditionsTolerance

Only a limited number of ISO tolerance grades are appropriate to spherical plain bearings. Table .These recommendations are based onthe considerations described above and have been confirmed in a wide variety of bearing applications.The ISO tolerance limits are given in•

Sliding contact surface combination steel-on-steelmaintenance-free

Table for shafts, and•

Table âˆ† for housing bores.To facilitate the calculation of the min-imum and maximum values of the the- oretical interference or clearance, the standardized bearing bore diameter de- viations (

Radial bearings Loads of all kindsm6 (n6)
1) k6interference fitLoads of all kindsh6h6 or g6clearance or (hardened(hardenedtransition fitshaft)shaft)
1 Angular contact bearings Loads of all kindsm6 (n6)m6interference fit
2 Thrust bearings Loads of all kindsm6 (n6)m6interference fit
The tolerances given in brackets may be chosen for very heavily loaded bearings. If chosen, it is necessary to checkthat the residual operating clearance is sufficient for correct performance of the bearing or whether a bearing with larger clearance must be used 3 1) 4 These recommendations do not apply to bearings of series GEG which have a bore diameter tolerance to H7 and are normally mounted on shaft seatings machined to m7. If, for mounting reasons the shaft is machined to toler- ance f7, it should be hardened as relative movements of the shaft with respect to the bearing bore will take place and wear may result The tolerances given in brackets may be chosen for very heavily loaded bearings. If chosen, it is necessary tocheck that the residual operating clearance of radial bearings is sufficient for correct performance of the bearing or whether a bearing with larger clearance must be used dmp

) and the bearing outsidediameter deviations ( âˆ†

Dmp

) are given inthe tables.

Table 2 Operating conditionsTolerance Sliding contact surface combination steel-on-steelmaintenance-free Radial bearings Angular contact bearings Light loads,H7H7axial displacement requiredHeavy loadsM7 (N7)K7 Light alloy housingsN7M7 Loads of all kinds,M7 (N7)M7interference fitLoads of all kinds,J7J7can generally be displaced axially Thrust bearings Purely axial loadsH11H11Combined loadsJ7J7 ISO shaft and housing tolerances Shaft fitsHousing fits Fig 6
n6 0+0+H11H7J7K7M7N7g6h6k6m6

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