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    Taper roller bearings are separate bearings. the inner ring with roller and cage form the inner components, and can be mounted  separately with outer ring. It has tapered raceway on inner and outer ring, and tapered rollers are mounted between the raceways.such bearing are mainly used to bear the combination load of radial and axial. The axial  carrying capacity of the bearing is depended on the contact angle a (the outer raceway angle).the larger the a ,the higher the axial carrying capacity of  the bearing  . This bearing can be classified into single-row,double-row and four-row taper roller bearing according to rows of rollers.

    The performance of Four-row taper roller bearing is more or less the same with the double-row taper roller bearing,and can bear larger radial load,but its limit rotating speed is lower.it is mainly used in heavy machinery,for instance,the working roll of rolling mill and backup roll ,etc.
    Taper roller bearing use pressed steel plate cage,but when the size is larger,it will adopt the machined solid  cage  , which is  welded with supporting rollers(each roller has a supporting hole in its radial center) .

    FOUR ROW TAPER ROLLER BEARINGS  d200-360mm

    Dimensions Basic load ratings
    Dyc     stc
    Cr      Cor     		Old Model New Model Weight
    d D B / H
    mm mm mm KN kg
    200 310 200 1970     4520 77740 77740 55.6
    200 310 275 1230     4200 2077140 - 75.1
    205 320 205 1060     2850 77741 77741 55.4
    220 340 305 2457     5974 2077144E 2077144E 100.8
    240 360 310 3300     7210 2077148 2077148 90.5
    241.48 349.15 228.6 1732     4387 - 330782A 70.4
    250 385 255 2127     4948 3-703 380650 107.8
    250 460 270 3040     5726 77750Y 77750Y 196
    260 360 265 1990     5770 2077952 382952 80
    260 400 255 2109     4957 77752 381052X2/HC 123
    260 400 345 2850     7700 - 382052 161
    260 440 300 2715     5968 777752 777752 164
    226.7 355.6 228.6 1780     5340 - 330822B 62.8
    280 420 250 1540     5300 77756 - 119
    280 460 324 3780     8560 1077756 381156 215.7
    300 460 390 3850     10200 2077160 - 222
    320 480 380 3000     11500 2077164 - 252
    340 460 310 2200     9300 2077968 - 147
    340 520 520 3200     8200 - 381068 247
    330.2 508 307.98 3806/330.2 232
    360 480 375 2550     11800 77872 - 197
    360 600 420 3950     13500 1077772 1077772 388
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