Double row cylindrical roller bearings

Double row cylindrical roller bearings

Double-row cylindrical roller bearings are rolling bearings whose design features two rows of cylindrical rollers.

Double-row cylindrical roller bearings are rolling bearings whose design features two rows of cylindrical rollers. This bearing has a compact structure, high load capacity, and high rigidity. Most of them use machined solid brass cages; they are also separable bearings, which makes installation and disassembly easy.

rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearingsrolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearingsrolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

NNU design bearings

NN design bearingsNNUP design bearings

Structural types of double-row cylindrical roller bearings

According to the different positions of the ribs, double-row cylindrical roller bearings can be divided into NN type, NNU type, and NNUP type, and the inner hole has two types: cylindrical type and conical type. The required internal clearance of the tapered bore bearing can be obtained by adjusting the pushing amount. The auxiliary code K follows the tapered hole in the nominal model. In addition, there are bearings with oil grooves and holes in the outer ring, and the auxiliary code in the nominal model is W. The schematic diagram is as follows:


Naming rules for double-row cylindrical roller bearings

double-row cylindrical roller bearings


Application of double-row cylindrical roller bearings

Because double-row cylindrical roller bearings have high load capacity, rigidity, and separability, they are particularly suitable for machine tool spindle supports. Double-row cylindrical roller bearings are also widely used in coal mine equipment.

Under certain working conditions, such as machine tool spindles with thin-walled bearings, rolls of steel rolling machines, and cylinders of printing machines, double-row cylindrical roller bearings can be used as axial locating or non-locating bearings. This bearing can withstand a certain degree of axial load and can, therefore, be used as a bearing on the fixed side of the equipment.


Technical parameters of double-row cylindrical roller bearings


Principal dimensions [mm]Basic load ratings [kN]Speed ratings [r/min]DesignationDesign

dynamicstaticReference speedLimiting speed

dDBCCC0



260440180
2200390013001600NNU 4152 K30M/W33NNU K30/W33
260440180
2200390013001600NNU 4152 M/W33NNU/W33
280460180
2550475012001500NNU 4156 K30M/W33NNU K30/W33
280460180
2550475012001500NNU 4156 M/W33NNU/W33
280470200
2700510010001500315976 BNNU/C3W33
300460180
2600550010001500BC2B 320119
300500200
2860530011001400NNU 4160 K30M/W33NNU K30/W33
300500200
2860530011001400NNU 4160 M/W33NNU/W33
320440118
1020236014001500NNUP 4964 B/HB1W33NNUP/W33
320460120
172036009501400BC2B 322216
320480175
246054009501400315583 CNNU.4/C3W33
320540218
3410620010001300NNU 4164 K30FNNU K30
320540218
3690620010001300NNU 4164 F
340520305200330071009001300BC2B 320118NNUB.2/C3WO
340580243
402075009501200NNU 4168 K30M/W33NNU K30/W33
340580243
402075009501200NNU 4168 M/W33NNU/W33
350520150
212045008501300BC2B 319878NNU/W33
360500125
179036509001300BC2B 320075NNU/C3W33
360500125
205043009001300BC2B 322217
360600243
429085009001100NNU 4172 K30M
370520220193275067008501300BC2B 319961NNUB.1/W33WI
380480100
952255012001300NNU 4876 K/W33NNU K/W33
380480100
952255012001300NNU 4876/HB1W33NNU/W33
380540130
201043008001200BC2B 326131/HB1
380540200
286068008001200BC2B 320041NNU.1/C4W33
380620243
429085008501100NNU 4176 K30M
380620243
429085008501100NNU 4176 M
400500100
968275011001200NNU 4880/HB1W33NNU/W33
400500100
968275011001200NNUP 4880/HB1W33NNUP/W33
400500100
968275012001200NNU 4880 K/W33NNU K/W33
400560205
314078008001200314987 BNNU.4/C4W33WI
400560205
314078008001200314987 CNNU.4/C4W33WI
400600.19200
347072007501100BC2B 326363/HA4NN.1/W33
400650250
473095008001000NNU 4180 K30M/W33NNU K30/W33
400650250
473095008001000NNU 4180 M/W33NNU/W33
410600220
380086507501100316019NNU.4/C4W33WI
420520100
990285011001200NNU 4884 K/W33NNU K/W33
420520100
990285011001200NNU 4884/W33NNU/W33
420580130
238053007501100BC2B 326137/HB1
420580160
233054007501100313555 A
420600220
358088007501100314982NNU.2/C4W33
420620200
347078007001100314391NNU.3/C4W33WI
440540100
1010290010001100NNU 4888 KM/W33NNU K/W33
440540100
1170340010001100NNU 4888 M/W33NNU/W33
440620225
391098007001000316077 ANNU.4/C4W33WI
440640230
457098008501000BC2B 316521NNU.4/W33W
440720280
572011800700900NNU 4188 K30M/W33NNU K30/W33
440720280
572011800700900NNU 4188 M/W33NNU/W33
457.2660.4228.6203.236908150670950BC2B 322969/HB1NNUB/W33
460580118
1190325010001100NNU 4892 K/W33NNU K/W33
460580118
1190325010001100NNU 4892/W33NNU/W33
460650235
4400112006701000316739 ANNU.4/C4W33WI
460760300
644012900670850NNU 4192 K30MNNU K30
460760300
644012900670850NNU 4192 M
460780280
561010400560850BC2-8004/HA1
480700260
539012500600900316189NNU.3/C3W33
480790308
704014300630800NNU 4196 K30M/W33NNU K30/W33
480790308
704014300630800NNU 4196 M/W33NNU/W33
487.98637175
30007600670950BC2B 326196/HA1NN/C2W20WI
490694174
37409000600900316639 AG
500680225
413011000600900314990 ANNU.4/C4W33WI
500720218
473010800600850314419NNU.3/C3W33WI
500830325
748015000600800NNU 41/500 K30M/W33NNU K30/W33
500830325
748015000600800NNU 41/500 M/W33NNU/W33
530780225
44009500530800BC2B 326064/HA1NNU/W33
530780250
468010200530800315040 ANNU/W33W
530780475285721017300530800BC2B 320117/HA4NNUB.3/C3WO
530870335
781016000560750NNU 41/530 K30M/W33NNU K30/W33
530870335
781016000560750NNU 41/530 M/W33NNU/W33
550800260
583013400530750316115NNU.3/C3W33
560920355
880018300530670NNU 41/560 K30M/W33XNNU K30/W33
560920355
880018300530670NNU 41/560 M/W33NNU/W33
600820287.5
644018000480700BC2B 319584/HA1NNU.4/C4W33WI
600820365
781021200480700BC2-8005/HB1NNU/CNW33
600980375
990021200480630NNU 41/600 K30M/W33NNU K30/W33
600980375
990021200480630NNU 41/600 M/W33NNU/W33
630850218
440011800480700BC2-8012/HB1NNU.7/C4WO
6301030400
1100024000450600NNU 41/630 K30M/W33NNU K30/W33
6301030400
1100024000450600NNU 41/630 M/W33NNU/W33
650920335
858023200530630BC2B 326894/HB1NNU.4/C4W33WI
660880225
418011800450670313477 B
6701090412
1210025500430530NNU 41/670 K30M/W33NNU K30/W33
6701090412
1210025500430530NNU 41/670 M/W33NNU/W33
690980365
1050027000400600BC2-8074/HA5NNU.3/CNW33
690980550357.5990027000400600BC2-8015/HB1NNUB.5/W33WI
7101150438
1340028500380500NNU 41/710 K30M/W33NNU K30/W33
7101150438
1340028500380500NNU 41/710 M/W33NNU/W33
7501000250
616016600380560314420NNU.3/C4W33WI
7501220475
1610035500380450NNU 41/750 K30M/W33NNU K30/W33
7501220475
1680036500360450NNU 41/750 M/W33NNU/W33
8001260375
1280028000300430BC2B 326379/HA4NN.1/C2W33
8001280475
1650036500320430NNU 41/800 K30M/W33NNU K30/W33
8001280475
1760040500340430NNU 41/800 M/W33NNU/W33
8501360500
1980045000300400NNU 41/850 K30M/W33NNU K30/W33
8501360500
1980045000300400NNU 41/850 M/W33NNU/W33
9001420515
2200047500280360NNU 41/900 K30M/W33NNU K30/W33
9001420515
2200047500280360NNU 41/900 M/W33NNU/W33
9501360420
1400033500260360BC2-8022/HA1NN/W33
9501500545
2550057000260340NNU 41/950 K30M/W33NNU K30/W33
9501500545
2550057000260340NNU 41/950 M/W33NNU/W33
10001580580
2750062000240300NNU 41/1000 K30M/W33NNU K30/W33
10001580580
2750062000240300NNU 41/1000 M/W33NNU/W33
10601660600
3030069500220280NNU 41/1060 K30M/W33NNU K30/W33
10601660600
3030069500220280NNU 41/1060 M/W33NNU/W33
11201750630
3360076500200280NNU 41/1120 K30M/W33NNU K30/W33
11201750630
3360076500200280NNU 41/1120 M/W33NNU/W33
11801850670
3690085000180240NNU 41/1180 K30M/W33NNU K30/W33
11801850670
3690085000180240NNU 41/1180 M/W33NNU/W33
12501950710
4180098000160220NNU 41/1250 K30M/W33NNU K30/W33
12501950710
4180098000160220NNU 41/1250 M/W33NNU/W33
1319.51720300
1250034500160240BC2B 326372/HA1NN.1/C4W33
13202060750
45700106000150190NNU 41/1320 K30M/W33NNU K30/W33
13202060750
45700106000150190NNU 41/1320 M/W33NNU/W33
14002180775
49500116000130170NNU 41/1400 K30M/W33NNU K30/W33
14002180775
49500116000130170NNU 41/1400 M/W33NNU/W33
15002300800
52800132000120150NNU 41/1500 K30M/W33NNU K30/W33
15002300800
52800132000120150NNU 41/1500 M/W33NNU/W33


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