SKF Cooper split roller bearings and bearing units

Permissible misalignment Under constant or slowly changing alignment conditions, there is a permissible misalignment up to 2,5 ° without compromising sealing capability. Loads The maximum safe radial load for a plum- mer block housing is based on the basic static load rating (C 0 ) of the corresponding size of split roller bearing. The load can be applied in full when the angle of the load falls within the shaded area of fig. 3 , except for: • housings in the SNC500 series, where the maximum load is reduced to 50% of the basic static load rating (C 0 ) • angled housings, where the maximum load is reduced to 50% of the basic static load rating (C 0 ) when the angle of the load falls within the shaded area of fig. 4 Contact SKF in the following cases: • the radial load falls outside the shaded areas of fig. 3 or fig. 4 • the radial load exceeds the basic static load rating (C 0 ) • the axial loads exceed 50% of the axial load rating (C a ) of the corresponding size of split roller bearing The permissible axial load of a plummer block housing is typically: • 35% of the bearing axial load rating (C a ) when used with 100 series split cylindrical roller bearings • 26% of the bearing axial load rating (C a ) when used with 01E and 02E series split cylindrical roller bearings For 01, 02, and 03/03E series split cylindri- cal roller bearings, as well as split tapered roller bearings, contact SKF. Design considerations To maximize bearing service life and prevent deformation of the housing bore, SKF rec- ommends the plummer block housing sup- porting surface to have: • a flatness to tolerance grade IT7, in accordance with ISO 1101 • a surface roughness Ra ≤ 12,5 µm For loads within 45° of the horizontal, the base should be chocked or dowelled. 120° Fig. 3 Load position in plummer block housings Fig. 4 Load position in angled plummer block housings Design considerations 20° 60° 107 4