Page 782 - Rollingbearings

9 Spherical roller bearings
Bearings for wind Customized bearings Bearings for high-
energy applications SKF can customize bearings to meet the speed applications

needs of applications where the bearings are
• are available in the 240 series, from subjected to unique operating conditions • have 50% higher limiting speeds than
d ≥ 530 mm For example, bearings for: standard bearings
• are designed explicitly for wind turbine • are available in the 223, 232, 240 and 241
main shafts • printing presses, paper mills or high- series in a special execution
• have an optimized internal geometry with precision coating systems • are identiied by the designation sufix
large diameter rollers and increased c on- • very arduous operating conditions, e g VA991
tact angle for increased axial load carrying continuous casters • address a market need in multi-megawatt
capacity (ig. 13) • bearings for high-speed applications industrial gearboxes
• have a roller-guided cast iron cage for • mounting with loose it on roll necks
increased robustness • railway vehicles For additional information about
• have no guide ring application -speciic spherical roller bearings,
• have a wide outer ring lubrication groove contact SKF
and six lubrication holes
• are indicated in the product table,
page 792, by the designation sufix BC

Table 6
Permissible angular misalignment
Bearing Permissible
series angular
Sizes misalignment

Fig. 13 Fig. 14 – °
Bearing for wind turbine main shaft Rotating shaft delection
Series 213 2
Series 222
Sizes < 52 2
Sizes ≥ 52 1,5
9 Series 223 3

Series 230
Sizes < 56 2
Sizes ≥ 56 2,5
Series 231
Sizes < 60 2
Sizes ≥ 60 3
Series 232
Table 3
Sizes < 52 2,5
Sizes ≥ 52 3,5
Width tolerances for SKF Explorer spherical roller bearings
Series 238 1,5
Bore diameter Width tolerances
d t ΔBs Series 239 1,5
> ≤ U L
Series 240 2
mm μm
Series 241
Sizes < 64 2,5
18 80 0 –60 Sizes ≥ 64 3,5
80 250 0 –80
250 300 0 –100
Series 248 1,5
Series 249 2,5

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