Four Row Tapered Cylindrical Roller Bearings

 

Designation

Boundary Dimension(mm)

Basic loadratings

Limiting Speed

r/min

Mass

New Code

Old Code

d

D

B

T

rsmin

r1smin

Cr(KN)

Cor(KN)

Grease

Oil

(Kg)

382952 2077952 260 360 265 265 3 2.5 1920 4590 450 560 76.3
382052 2077152 260 400 345 345 5 4 3750 7950 430 530 153
381156 1077756 280 460 324 324 5 4 4100 7850 360 450 200
382960 2077960 300 420 300 300 4 3 2253 4702 380 480 130
382060 2077160 300 460 390 390 5 4 3234 6832 360 450 238
381160 1077760 300 500 370 370 5 4 3654 6776 340 430 285
382064/YB2 2077164 320 480 380 380 5 4 3234 8296 340 430 234
382968 2077968 340 460 310 310 4 3 2478 5782 340 430 145
380068 77168 340 520 325 325 5 4 2898 5872 320 400 234
381168 1077768 340 580 425 425 5 4 4236 8450 280 360 441
380072 77172 360 540 325 325 5 4 3388 6524 300 380 248
380076 77176 380 560 325 325 5 4 3066 5754 280 380 281
381176 1077776 380 620 420 420 5 4 5082 9604 240 360 519
380080 77180 400 600 356 356 5 4 2618 6762 240 320 317
380084 77184 420 620 356 356 5 4 3948 7616 220 300 358
381184 1077784 420 700 480 480 6 5 7308 12360 190 260 760
380088 77188 440 650 376 376 6 5 4326 9072 200 280 401
381992 1077992 460 620 310 310 4 3 3402 7350 200 280 173
380092 77192 460 680 410 410 6 5 5665 11235 180 240 476
381996 1077996 480 650 338 338 5 4 3390 10500 190 260 301
380096 77196 480 700 420 420 6 5 5922 12600 170 220 547
3800/500 771/500 500 720 420 420 6 5 5950 12768 160 200 565
3800/530 771/530 530 780 450 450 6 5 7602 15960 140 180 744
3811/530 10777/530 530 870 590 590 7.5 6 10038 20300 110 160 1422
3819/560 10779/560 560 750 368 368 5 4 4424 10374 140 180 456
3811/560 10777/560 560 920 620 620 7.5 6 12138 20300 100 140 1635
3819/600 10779/600 600 800 380 380 5 4 4728 11652 120 160 536
3800/600 771/600 600 870 480 480 6 5 7212 15960 100 140 995
3811/600 10777/600 600 980 650 650 7.5 6 11808 24480 90 120 1970
3819/630 10779/630 630 850 418 418 6 5 7472 17600 100 140 720
3800/630 771/630 630 920 515 515 7.5 6 9975 20860 95 130 1158
3811/630 10777/630 630 1030 670 670 7.5 6 10755 31080 85 110 2170
3819/670 10779/670 670 900 412 412 6 5 7545 17360 95 130 959
3811/670 10777/670 670 1090 710 710 7.5 6 15700 39900 75 95 2665
3800/710 771/710 710 1030 555 555 7.5 6 9828 22560 75 95 1568
3811/710 10777/710 710 1150 750 750 9.5 8 15840 33960 67 85 3227
3800/750 771/750 750 1090 605 605 7.5 6 11580 26760 70 90 1880
3811/750 10777/750 750 1220 840 840 9.5 8 18590 41470 48 80 3994
3820/950 20771/950 950 1360 880 880 7.5 6 17000 44200 48 80 4087
3820/1060 20771/1060 1060 1500 1000 1000 9.5 8 21300 56300 48 80 5698

 

Four-row tapered roller bearings
Tapered roller bearings have tapered inner and outer ring raceways and tapered rollers. The bearings are not self-retaining. As a result, the inner ring together with the rollers and cage can be fitted separately from the outer ring. Tapered roller bearings utilize conical rollers and raceways, arranged so that the rollers and raceways meet at a common apex. The rollers are guided by contact between the large end of the roller and a rib on the inner ring. They are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle (α). The size of the angle is indicated by the calculation factor e :the larger the value of e, the larger the contact angle. 
Four-row tapered roller bearings are used successfully worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. Because of their design they are able to take up those axial loads which occur in such applications in addition to radial loads and generally no separate thrust bearings are required in such arrangements. This means that the roll necks can be relatively short and the chocks at both sides of the roll can have the same design.
Four-row tapered roller bearings, because of their design, must be installed as complete bearings in the chocks. To enable quick roll changes to be made they must therefore have a loose fit on the roll necks. Loose fits have the disadvantage that the inner rings wander on their seats under the prevailing load conditions causing wear to the seats which normally have a lower hardness than the rings. To alleviate the effects of a loose fit to some extent, i.e. to reduce wear, SKF bearings have a helical groove in the bore and/or lubrication grooves in the side faces of the inner rings. These grooves enable lubricant to be supplied to the contact surfaces of the inner ring and seat. Additionally, the grease-filled grooves can absorb the wear particles.
LYNB produces an extensive range of four-row tapered roller bearings which covers not only the conventional designs with intermediate rings between the outer and/or inner rings, but also a new design with modified rings which integrate the intermediate rings.
▲   The design’s of all these tapered roller bearings are based on standard structures; LYNB can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNB Technical Center if you need any assistance in this area.  
 
If you have any suggestions or opinions about our products,please leave a message,and we will immediately answer your questions. Thanks for your support.
  • Product Name:
  • *Company Name:
  • *Your Name:
  • *E-mail:
  • Tel./ Fax.:
  • Country:
  • Picture / File:
  • *Content:
  • .
Contact Us
Luoyang Nice Bearing Co.,Ltd.
Leave a Message
Please leave a message,and we will immediately answer your questions.
Company Name:
*Your Name:
*E-mail:
County:
*Content:
.
Copyright © 2015 Luoyang Nice Bearing Co.,Ltd. All rights Reserved. Power By Sinoart