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249/750-B-K30-MB
Spherical Roller Bearing
Spherical roller bearing 249..-B-K30-MB, symmetric 3 ribs
Replaces
249/750BK30MB
Product information
Metric
Imperial
Main Dimensions & Performance Data
d | 750 mm | Bore diameter |
D | 1.000 mm | Outside diameter |
B | 250 mm | Width |
Cr | 7.200.000 N | Basic dynamic load rating, radial |
C0r | 18.900.000 N | Basic static load rating, radial |
Cur | 1.200.000 N | Fatigue load limit, radial |
nG | 510 1/min | Limiting speed |
nϑr | 143 1/min | Reference speed |
≈m | 544,2 kg | Weight |
Mounting dimensions
da min | 773 mm | Minimum diameter shaft shoulder |
Da max | 977 mm | Maximum diameter of housing shoulder |
ra max | 5 mm | Maximum recess radius |
Dimensions
rmin | 6 mm | Minimum chamfer dimension |
D1 | 921,7 mm | Bore diameter outer ring |
ds | 12,5 mm | Diameter lubrication hole |
ns | 23,5 mm | Width of lubricating groove |
Temperature range
Tmin | -30 °C | Operating temperature min. |
Tmax | 200 °C | Operating temperature max. |
Calculation factors
e | 0,22 | Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y |
Y1 | 3,1 | Dynamic axial load factor |
Y2 | 4,62 | Dynamic axial load factor |
Y0 | 3,03 | Static axial load factor |