ISB 248/1800 K spherical roller bearings

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Size (mm) | 250x140x42 |
Bore Diameter (mm) | 250 |
Outer Diameter (mm) | 140 |
Width (mm) | 42 |
d | 140 mm |
D | 250 mm |
B | 42 mm |
d1 | 176.8 mm |
d2 | 176.8 mm |
D1 | 213.2 mm |
r1,2 – min. | 3 mm |
r3,4 – min. | 1.5 mm |
a | 47.3 mm |
da – min. | 154 mm |
db – min. | 154 mm |
Da – max. | 236 mm |
Db – max. | 241 mm |
ra – max. | 2.5 mm |
rb – max. | 1.5 mm |
dn | 184.8 mm |
Basic dynamic load rating – C | 221 kN |
Basic static load rating – C0 | 240 kN |
Fatigue load limit – Pu | 7.4 kN |
Limiting speed for grease lubrication | 7000 r/min |
Limiting speed for oil lubrication | 10000 mm/min |
Ball – Dw | 30.162 mm |
Ball – z | 18 |
Gref | 83.931 cm3 |
Calculation factor – f0 | 15.2 |
Preload class A – GA | 850 N |
Preload class B – GB | 1700 N |
Preload class C – GC | 3400 N |
Preload class D – GD | 6800 N |
Calculation factor – f | 1 |
Calculation factor – f2A | 1 |
Calculation factor – f2B | 1.01 |
Calculation factor – f2C | 1.03 |
Calculation factor – f2D | 1.06 |
Calculation factor – fHC | 1.01 |
Preload class A | 181 N/micron |
Preload class B | 245 N/micron |
Preload class C | 339 N/micron |
Preload class D | 485 N/micron |
r1,2 min. | 3 mm |
r3,4 min. | 1.5 mm |
da min. | 154 mm |
db min. | 154 mm |
Da max. | 236 mm |
Db max. | 241 mm |
ra max. | 2.5 mm |
rb max. | 1.5 mm |
Basic dynamic load rating C | 221 kN |
Basic static load rating C0 | 240 kN |
Fatigue load limit Pu | 7.35 kN |
Attainable speed for grease lubrication | 7000 r/min |
Attainable speed for oil-air lubrication | 10000 r/min |
Ball diameter Dw | 30.162 mm |
Number of balls z | 18 |
Reference grease quantity Gref | 83.931 cm³ |
Preload class A GA | 850 N |
Static axial stiffness, preload class A | 181 N/µm |
Preload class B GB | 1700 N |
Static axial stiffness, preload class B | 245 N/µm |
Preload class C GC | 3400 N |
Static axial stiffness, preload class C | 339 N/µm |
Preload class D GD | 6800 N |
Static axial stiffness, preload class D | 485 N/µm |
Calculation factor f | 1.09 |
Calculation factor f1 | 1 |
Calculation factor f2A | 1 |
Calculation factor f2B | 1.01 |
Calculation factor f2C | 1.03 |
Calculation factor f2D | 1.06 |
Calculation factor fHC | 1.01 |
Calculation factor f0 | 15.2 |
Mass bearing | 6.92 kg |
Detailed Parameters
parameter:
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