ZKL Large-Size and Special Bearings
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Double Row Spherical Roller <strong>Bearings</strong><br />
Double row spherical roller bearings have two rows of spherical rollers with joint ball-shaped raceway in outer ring. This design enables<br />
relative tilting of rings. These bearings can simultaneously accommodate large radial <strong>and</strong> axial loads in both directions. They are produced<br />
either with cylindrical or tapered bore.<br />
Dimensions<br />
The boundary dimensions of double row spherical roller bearings comply with ISO 15:1998 St<strong>and</strong>ard.<br />
Tolerance<br />
The bearings are supplied in normal tolerance class P0 as a st<strong>and</strong>ard, without being indicated on them. Requirements of higher tolerance<br />
class should be negotiated with the producer. The dimensions tolerances comply with ISO 492:2002 St<strong>and</strong>ard.<br />
Radial Clearance<br />
Regularly manufactured bearings are of normal radial clearance, it is not indicated in bearing designation. For special types of applications<br />
the bearings can be supplied in higher radial clearance C3, C4 <strong>and</strong> C5 or in reduced clearance C2. All these radial clearances conform<br />
to values of ISO 5753:1991 St<strong>and</strong>ard.<br />
Misalignment<br />
<strong>Bearings</strong> can be tilted from central position without impairing their correct functions. The following table shows permissible misalignment<br />
values, depending on bearing type.<br />
Bearing Type<br />
Permissible Misalignment<br />
239, 230, 231, 222 1°30'<br />
223 2°<br />
232 2°30‘<br />
240 2°<br />
241 2°30‘<br />
Calculation of equivalent dynamic load<br />
P r = F r + Y 1 F a pro F a /F r ≤ e [kN]<br />
P r = 0,67F r + Y 2 F a pro F a /F r > e [kN]<br />
Calculation of equivalent static load<br />
P or = F r + Y 0 F a [kN]<br />
Double Row Spherical Roller <strong>Bearings</strong> Specification<br />
Bearing<br />
Designation<br />
Boundary Dimensions<br />
Dynamic<br />
Load Rating<br />
Static Load<br />
Rating<br />
Limiting Speed Frequency for<br />
Lubrication by<br />
Fatigue Load Limit<br />
d D B C r C or Oil Grease Pu<br />
mm kN min -1 kN<br />
239/600 600 800 150 3650 9030 400 320 614,25<br />
230/600 600 870 200 5500 12900 380 300 864,75<br />
240/600 600 870 272 7130 16800 320 240 1 126,18<br />
231/600 600 980 300 9020 18200 280 200 1 193,90<br />
241/600 600 980 375 11900 24900 240 180 1 633,42<br />
232/600 600 1090 388 13200 25800 260 190 1 658,63<br />
239/630 630 850 165 4100 10300 360 280 689,05<br />
230/630 630 920 212 6270 13360 340 260 881,46<br />
240/630 630 920 290 7860 18500 300 220 1 220,58<br />
231/630 630 1030 315 10600 21200 260 190 1 370,25<br />
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