Load carrying capacity
All SDAF housings are intended for loads acting perpendicularly toward the support surface. If the housing is supported over its entire base and the loads are purely perpendicular, loads are limited only by the bearing.
If loads acting in other directions occur, or if the housing is not supported over its entire base, be sure that the magnitude of the load is permissible for the housing and the attachment bolts.
Load carrying capacity of the housing
Guideline values for the safe loads of housings made of grey cast iron are listed in the product tables for bearings on an adapter sleeve and for bearings with a cylindrical bore. The safe loads have been calculated using a safety factor of 5 against base fracture and a factor of 2 against cap bolt yield.
For housings made of ductile iron, the values obtained from the product tables should be multiplied by a factor of 1,5 for ASTM A339 grade 60-45-10. For information about ASTM A339 grade 80-60-03, contact the SKF application engineering service. For purely axial loads, static or dynamic, the loads on the housing should not exceed 65% of P180°. For bearings mounted on adapter sleeves, the permissible axial load is dependent on the adapter sleeve.
Additional housing support
When the housing is subjected to loads acting parallel to the support surface, it may be necessary to pin the housing to the support surface or to provide a stop to counter the load. When loads act at angles between 60° and 120°, or when the axial loads are greater than 5% of P180°, the housing should be pinned to the support surface or a stop should be provided to counter the load. The dowel pins or stop should be sufficiently strong to accommodate the loads acting parallel to the support surface.