URB GROUP URB Railway Bearings

It is possible to convert the bearing life to vehicle running distance.
where
Dw = wheel diameter, m;
L10s = bearing life expressed as vehicle running distance, millions
of km;
For performing calculation modified life we developed a program for computer which consider the
fatique stress limit of the bearing steel and make it easy to estimate the influence of lubrication and
contamination on bearing life.
Recommended life values for axleboxes bearings
Type of vehicle
Freight cars 1)
Local traffic vehicles
Passenger coaches rail cars for district traffic 2)
Rail cars for long distance traffic
Locomotives
1)
2)
L10s
mill.km
1,7
1,5 to 2
2,0 to 4
3,0 to 5
2,0 to 5
Dw
m
0,9
0,7
0,9
1,0
1,2
C/P
6,8
7,1 to 7,7
7,2 to 8,8
7,8 to 9,1
6,6 to 8,6
URB GROUP
The company was set-up on May 1953 and it has a long tradition in manufacturing
of bearings over 56 years, being one of the important bearing manufacturers
in the Central and South-East Europe. We manufactured and trade under URB,
KRS brands or on customer request, a wide range of bearings utilized
in automobiles, steel mills, electric motors, speed reducers, mining industry,
construction machinery.
URB Railway Bearings
Double Row Cylindrical Roller Bearings
Ball Bearings
Double Row Cylindrical Roller Bearings with Ribs
Spherical Roller Bearings
Cylindrical Roller Bearing Specified By UIC
According to UIC: L10s = 0.8 million km under constant full payload
According to UIC: L10s = 3,0 million km
Laboratory test
Our laboratory test types:
- tests for confirmation of basic dynamic load rating or rating life estimation for bearings from
currently manufacture;
- tests of rating life, required by customers;
- tests on research problems (for verification of theoreticaly aspects regarding bearings design)
URB GROUP
Double row Cylindrical Roller Bearings Standardized By UIC
Our company
manufacture the bearings for modern railway systems must offer excellent durability and
high-speed capability with minimal maintenance requirements.
Guarantee
URB Group quaranty of good operating bearings for two years after delivery.
Certificates
The main target of our company is to meet our customers requirements, offering high quality
products at competitive prices. We have a set of advanced scientific management system, advanced
bearing production equipment, ISO 9001 and ISO 14001 certification with TÜV Thuringen Germany.
www.urb.ro
URB GROUP
320 Republicii Street, 731108 Barlad, ROMANIA
phone: +40 235 / 411120, 412120 fax: +40 235 / 413838, 308200
sales@urb.ro
www.urb.ro
Technical Information
This publication is primarily geared towards manufacturers and operators of rail vehicles who use journal roller bearings,
traction motor bearings and transmission bearings.
The following pages contain our product ranges for journal roller bearings, axle box bearings, transmissions and traction
motors.
The quality demands we place on our products and services are the result of more than 56 years experience in the
production of precision components for rail applications.
Through research and development, their performance has been adapted to meet the high requirements of modern rail
vehicles.
We offer a large ranges of bearings (ball bearings and roller bearings) for rail application:
URB bearings for railway vehicles according UIC 510-1, EN 12080 and EN 12082:
Designation
d
Dimensions
mm
D
B
Basic radial
kN
dyn.
stat.
Weight
kg
Risk class
2.4
3.1
3.8
48
6.7
10.8
15.6
7.9
24
0.032
0.037
0.046
0.07
0.105
0.197
0.29
0.158
0.641
1B
1B
1B
1B
1B
1B
1B
1B
1B
22.2
27.7
50.2
50.2
50.2
51.6
249
306
306
256
343
343
343
412
412
443
479
479
550
550
550
550
666
314
345
345
345
418
418
418
516
516
609
726
726
37
37
47
65.4
65.4
77.5
0.132
0.158
0.31
0.33
0.33
0.514
3.24
3.55
3.88
4.5
5.29
5.69
5.57
6.46
6.43
7.45
9.1
9.1
11.67
12.1
12.1
11.67
14.84
3.58
4.29
4.38
4.42
5.15
5.22
4.77
7.22
7.86
9.16
11.6
11.6
0.296
0.296
0.445
0.596
0.584
0.744
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
Radial ball bearing
6200 2RSRP6ELL
6201 2RSRP6ELL
6202 2RSRP6ELL
6203 2RSRP6ELL
6204 2RSRP6ELL
6206 2ZRL
6207 2ZL
6304 P64L
6308 C3L
10
12
15
17
20
30
35
20
40
30
32
35
40
47
62
72
52
90
9
10
11
12
14
16
17
15
23
5.1
6.9
7.8
26
12.8
19.3
25.7
15.9
40.8
Cylindrical roller bearing
NU204 EMA6C3L
NU205 EMA6L
NU207 EL
NU207 EMAC4L
NJ207 EMAC3L
NJ208 EMAC4L
NJ219 EMP63TR
NJ220 EP62L
NUP220 EMAP63L
NU221 MAS0C3L
NU222 EMP63L
NU222 EMAP63L
NUP222 EMC4TR
NU224 EMC3L
NU224 EMAP63L
NU226 EMAP63L
NU228 EMC3L
NU228 EMAP63S0L
NU230 EMAP63S0L
NUP230 EMP63L
NUP230 EMP63TR
NUP230EMAP63TR
NU232 EMAC3S0L
NU2218 EMAC3L
NU2219 EMP63TR
NJ2219 EMP63TR
NUP2219 EMP63TR
NU2220 EMP63TR
NJ2220 EMAP63L
NJP2220 EMAP63L
NU2222EMAP63S0L
NUP2222 EMAP63L
NU2224 EMAP63L
NU2226 EMAP63L
NU2226 EMC3L
NU305 EMAC3L
NJ305 EMAC3L
NU306 EMAC3L
NU307 EMAC3L
NU307 EML
NU308 EMAC3L
20
25
35
35
35
40
95
100
100
105
110
110
110
120
120
130
140
140
150
150
150
150
150
90
95
95
95
100
100
100
110
110
120
130
130
25
25
30
35
35
40
47
52
72
72
72
80
170
180
180
190
200
200
200
215
215
230
250
250
270
270
270
270
290
160
170
170
170
180
180
180
200
200
215
230
230
62
62
72
80
80
90
14
15
17
17
17
18
32
34
34
36
38
38
38
40
40
40
42
42
45
45
45
45
48
40
43
43
43
46
46
46
53
53
58
64
64
17
17
19
21
21
23
25.7
29.3
50.3
50.3
50.3
52.6
210
249
249
210
279
279
279
329
329
356
372
372
422
422
422
422
498
242
273
273
273
319
319
319
383
383
446
523
523
41.2
41.2
50.5
66.7
66.7
79.9
NU308 EMC3L
NU309 EP63L
NU309 EMC3L
NU309 EMAP63L
NU310 EMAP63L
NU312 EMAC3L
NU314 EC4L
NU314 EMA6P63L
NU314 EM6P63L
NU315 EMP63TR
NUP315 EMP63TR
NU316 EMAP63L
NU317 EMAC3L
NUP317 EMAP63L
NU318 EMA P64L
NJ318 EMC3L
NJ318 EMAC3L
NU320 EMP63L
NU320 EMAP63L
NJ320 EMC3L
NJ320 EMAC3L
NUP320 EMP63TR
NU322EC3L
NU322 EMAP63L
NU322 EMP63L
NU322 EMAP63S0L
NJ324 EMC3L
NU324 EMP63L
NU326 EM6C3L
NU326 EMAP63L
NU1020 MAC3L
NU1026 MC4L
NU1026 MAC3L
NU1026 MAC4S0L
NU1032 MAP63L
NU1034 MC3L
NU1036 MC3L
NU1036 MC3TR
NU1040 MP63L
NU1044 MAP63L
NU1044 MAP63S0L
NU2316 EMAP63L
NU2317 EMA6P63L
NU2319 MAP63L
NU2322 EMAP63L
NU2322 EMAS0P63L
NU2948 MAP63L
NU407 MAP63L
NU410 MAC3L
NU410 MAS0C3L
NU414 MAP63L
NU416 MAP63L
NU424 MP64TR
487632 MASC4
WJ+WUJ110/215 MC3
WJ+WJP 110/215 MC3
WJ+WJP117/240 MC4
WJ+WJP118/240 MC4
WJ+WJP119/240 MC4
WJ+WJP120/240 MC3
WJ+WJP120/240 TNC3
WJ+WJP130/240 MC3
WJ+WJP130/240 TNC3
WJ+WJP130/250 MC4
WJ130/250 F
WJP130/250 F
WJ+WJP130/250 F
WJ+WJP130/260M6C4
WJ+WJP140/300 MC4
WJ+WJP160/320 MC4
RWJ110/215 M
RWJ120/240 M
RWJ120/240 TN
RWJ130/240 M
RWJ130/240 TN
RWJ130/250 M
RWJ140/300 M
40
45
45
45
50
60
70
70
70
75
75
80
85
85
90
90
90
100
100
100
100
100
110
110
110
110
120
120
130
130
100
130
130
130
160
170
180
180
200
220
220
80
85
95
110
110
240
35
50
50
70
80
120
160
110
110
117
118
119
120
120
130
130
130
130
130
130
130
140
160
-
90
100
100
100
110
130
150
150
150
160
160
170
180
180
190
190
190
215
215
215
215
215
240
240
240
240
260
260
280
280
150
200
200
200
240
260
280
280
310
340
340
170
180
200
240
240
320
100
130
130
180
200
310
270
215
215
240
240
240
240
240
240
240
250
250
250
250
260
300
320
215
240
240
240
240
250
300
23
25
25
25
27
31
35
35
35
37
37
39
41
41
43
43
43
47
47
47
47
47
50
50
50
50
55
55
58
58
24
33
33
33
38
42
46
46
51
56
56
39
60
67
80
80
48
25
31
31
42
48
72
168
73
73
160
160
160
160
160
160
160
160
80
80
160
172
102
102
73
80
80
80
80
80
102
79.9
97.4
97.4
97.4
110
150
205
205
205
240
240
253
288
288
311
311
311
381
381
381
381
381
443
443
443
443
543
549
607
607
89
163
163
163
230
277
336
336
395
650
650
353
368
390
667
667
363
75.7
139
139
240
316
677
1000
773
773
946
946
946
946
946
951
951
1028
609
609
1028
1212
1554
1630
459
560
560
563
563
626
990
77.5
98.3
98.3
98.3
112
157
222
222
222
263
263
277
325
325
349
349
349
427
427
427
427
427
513
513
513
513
644
644
722
722
120
221
221
221
328
400
479
479
590
1047
1047
425
446
491
868
868
689
69.4
136
136
253
339
776
1760
1188
1188
1464
1464
1484
1484
1484
1620
1620
1660
816
816
1660
1932
2460
2676
607
755
755
823
823
885
1250
0.745
0.897
1.022
1.035
1.297
2.121
2.822
3.208
3.213
3.84
3.82
4.27
5.8
5.4
6.44
6.14
5.4
8.53
8.6
8.6
8.6
8.23
11.03
11.9
11.66
11.03
14.99
14.84
18.9
18.65
1.37
3.76
3.76
3.76
6.04
8.74
10.52
10.52
14.1
18.7
18.5
6.6
7.6
9.3
19.27
19.27
11.20
1.17
2.25
2.25
5.9
7.5
29.92
39.21
26.04
25.34
34.7
34.46
34.22
33.98
31.7
32.74
30.08
37.7
18.874
18.874
37.75
37.7
71.62
81.57
9.823
12.780
11.636
12.47
11.143
14.249
27.476
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Spherical roller bearings
23040 MBW33P6L
23226 MBP63L
23234 CC3L
23234 CC3W33L
23234 CC3W33-168L
23234 CC3W33-169L
24132 CC3W33L
24132 CC3W33-158L
24132 CC3W33-159L
24132 MBW33L
24136CC3L
24136CC3-178L
24136CC3-179L
24136CC3W33L
24136CC3W33-178L
24136CC3W33-179L
25126 MBKC3L
25128 MBKC4L
25129 CYC3L
25226 CC3L
25226 CYC3W33L
25326 CC3L
22326 MBL
23034 MBKC3L
23036 MBKC3L
23040 MBKC3L
23040 MBC3L
23956 MBC3W33L
230
130
170
170
168
169
160
158
159
160
180
178
179
180
178
179
130
140
144.475
131.796
131.796
130
130
170
180
200
200
180
310
230
310
310
310
310
270
270
270
270
300
300
300
300
300
300
240
260
250
220
220
220
280
260
280
310
310
250
82
80
110
110
110
110
109
109
109
109
118
118
118
118
118
118
80
86
80
73
73
73
93
67
74
82
82
52
760
760
1460
1460
1460
1460
1250
1250
1250
940
1460
1460
1460
1460
1460
1460
572
663
728
561
561
561
1080
680
800
760
760
454
1350
1170
2320
2320
2320
2320
2110
2110
2110
1558
2590
2590
2590
2590
2590
2590
1104
1288
1210
934
934
934
1450
1170
1380
1350
1350
830
21.82
14.97
35.82
35.67
35.77
35.77
24.96
25.040
25.040
25.38
33.52
33.52
33.52
33.42
33.42
33.42
15.314
19.960
16.53
11.192
11.172
11.35
28.59
14.22
17.15
21.92
22.02
7.79
Internal Design
B - Asymmetrical rollers
C - Symmetrical rollers
E - Max. capacity symmetrical
R - Bearings without inner rings
M - Machined brass cage, roller centred
MA - Machined brass cage, outer ring centred
MB - Machined brass cage, inner ring centred
TN - Injection moulded cage of glass fibre reinforced polyamide 6.6
Bore Type
K - Tapered bore ratio 1:12
No code - Cylindrical
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Cage
Radial Clearance
No code - Standard
C3 - Greater than Standard
C4 - Greater than C3
Running accuracy
Lubrication
P6 - Dimensional and running
accuracy to ISO tolerance class 6
P63 - P6 +C3
W33 - Annular groove and three lubrication holes
in the outer ring
2RSR - Bearing with 2 seals
2 ZR - Bearing with 2 shield
2 Z - Bearing with 2 shields and recess on the bearing
Destination
TR- traction motor bearings
L - Locomotive bearings
EL - Motors bearings
S0 - Bearing rings stabilized for use at operating temperature up to +1500
Calculation of rating life
Bearing life shall be calculated using ISO 281:2007.
For the calculation of roller bearing life the standard life equation is should be used
according ISO 281:2007.
where
L10 = basic rating life, millions of revolutions;
L10h = basic rating life, hours;
C = basic dynamic load rating according to ISO 281, kN;
P = dynamic equivalent bearing load, kN;
n = rotational speed, r/min;
p = life exponent ( 3 for ball bearings and 10/3 for roller
bearings)
Technical Information
This publication is primarily geared towards manufacturers and operators of rail vehicles who use journal roller bearings,
traction motor bearings and transmission bearings.
The following pages contain our product ranges for journal roller bearings, axle box bearings, transmissions and traction
motors.
The quality demands we place on our products and services are the result of more than 56 years experience in the
production of precision components for rail applications.
Through research and development, their performance has been adapted to meet the high requirements of modern rail
vehicles.
We offer a large ranges of bearings (ball bearings and roller bearings) for rail application:
URB bearings for railway vehicles according UIC 510-1, EN 12080 and EN 12082:
Designation
d
Dimensions
mm
D
B
Basic radial
kN
dyn.
stat.
Weight
kg
Risk class
2.4
3.1
3.8
48
6.7
10.8
15.6
7.9
24
0.032
0.037
0.046
0.07
0.105
0.197
0.29
0.158
0.641
1B
1B
1B
1B
1B
1B
1B
1B
1B
22.2
27.7
50.2
50.2
50.2
51.6
249
306
306
256
343
343
343
412
412
443
479
479
550
550
550
550
666
314
345
345
345
418
418
418
516
516
609
726
726
37
37
47
65.4
65.4
77.5
0.132
0.158
0.31
0.33
0.33
0.514
3.24
3.55
3.88
4.5
5.29
5.69
5.57
6.46
6.43
7.45
9.1
9.1
11.67
12.1
12.1
11.67
14.84
3.58
4.29
4.38
4.42
5.15
5.22
4.77
7.22
7.86
9.16
11.6
11.6
0.296
0.296
0.445
0.596
0.584
0.744
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
Radial ball bearing
6200 2RSRP6ELL
6201 2RSRP6ELL
6202 2RSRP6ELL
6203 2RSRP6ELL
6204 2RSRP6ELL
6206 2ZRL
6207 2ZL
6304 P64L
6308 C3L
10
12
15
17
20
30
35
20
40
30
32
35
40
47
62
72
52
90
9
10
11
12
14
16
17
15
23
5.1
6.9
7.8
26
12.8
19.3
25.7
15.9
40.8
Cylindrical roller bearing
NU204 EMA6C3L
NU205 EMA6L
NU207 EL
NU207 EMAC4L
NJ207 EMAC3L
NJ208 EMAC4L
NJ219 EMP63TR
NJ220 EP62L
NUP220 EMAP63L
NU221 MAS0C3L
NU222 EMP63L
NU222 EMAP63L
NUP222 EMC4TR
NU224 EMC3L
NU224 EMAP63L
NU226 EMAP63L
NU228 EMC3L
NU228 EMAP63S0L
NU230 EMAP63S0L
NUP230 EMP63L
NUP230 EMP63TR
NUP230EMAP63TR
NU232 EMAC3S0L
NU2218 EMAC3L
NU2219 EMP63TR
NJ2219 EMP63TR
NUP2219 EMP63TR
NU2220 EMP63TR
NJ2220 EMAP63L
NJP2220 EMAP63L
NU2222EMAP63S0L
NUP2222 EMAP63L
NU2224 EMAP63L
NU2226 EMAP63L
NU2226 EMC3L
NU305 EMAC3L
NJ305 EMAC3L
NU306 EMAC3L
NU307 EMAC3L
NU307 EML
NU308 EMAC3L
20
25
35
35
35
40
95
100
100
105
110
110
110
120
120
130
140
140
150
150
150
150
150
90
95
95
95
100
100
100
110
110
120
130
130
25
25
30
35
35
40
47
52
72
72
72
80
170
180
180
190
200
200
200
215
215
230
250
250
270
270
270
270
290
160
170
170
170
180
180
180
200
200
215
230
230
62
62
72
80
80
90
14
15
17
17
17
18
32
34
34
36
38
38
38
40
40
40
42
42
45
45
45
45
48
40
43
43
43
46
46
46
53
53
58
64
64
17
17
19
21
21
23
25.7
29.3
50.3
50.3
50.3
52.6
210
249
249
210
279
279
279
329
329
356
372
372
422
422
422
422
498
242
273
273
273
319
319
319
383
383
446
523
523
41.2
41.2
50.5
66.7
66.7
79.9
NU308 EMC3L
NU309 EP63L
NU309 EMC3L
NU309 EMAP63L
NU310 EMAP63L
NU312 EMAC3L
NU314 EC4L
NU314 EMA6P63L
NU314 EM6P63L
NU315 EMP63TR
NUP315 EMP63TR
NU316 EMAP63L
NU317 EMAC3L
NUP317 EMAP63L
NU318 EMA P64L
NJ318 EMC3L
NJ318 EMAC3L
NU320 EMP63L
NU320 EMAP63L
NJ320 EMC3L
NJ320 EMAC3L
NUP320 EMP63TR
NU322EC3L
NU322 EMAP63L
NU322 EMP63L
NU322 EMAP63S0L
NJ324 EMC3L
NU324 EMP63L
NU326 EM6C3L
NU326 EMAP63L
NU1020 MAC3L
NU1026 MC4L
NU1026 MAC3L
NU1026 MAC4S0L
NU1032 MAP63L
NU1034 MC3L
NU1036 MC3L
NU1036 MC3TR
NU1040 MP63L
NU1044 MAP63L
NU1044 MAP63S0L
NU2316 EMAP63L
NU2317 EMA6P63L
NU2319 MAP63L
NU2322 EMAP63L
NU2322 EMAS0P63L
NU2948 MAP63L
NU407 MAP63L
NU410 MAC3L
NU410 MAS0C3L
NU414 MAP63L
NU416 MAP63L
NU424 MP64TR
487632 MASC4
WJ+WUJ110/215 MC3
WJ+WJP 110/215 MC3
WJ+WJP117/240 MC4
WJ+WJP118/240 MC4
WJ+WJP119/240 MC4
WJ+WJP120/240 MC3
WJ+WJP120/240 TNC3
WJ+WJP130/240 MC3
WJ+WJP130/240 TNC3
WJ+WJP130/250 MC4
WJ130/250 F
WJP130/250 F
WJ+WJP130/250 F
WJ+WJP130/260M6C4
WJ+WJP140/300 MC4
WJ+WJP160/320 MC4
RWJ110/215 M
RWJ120/240 M
RWJ120/240 TN
RWJ130/240 M
RWJ130/240 TN
RWJ130/250 M
RWJ140/300 M
40
45
45
45
50
60
70
70
70
75
75
80
85
85
90
90
90
100
100
100
100
100
110
110
110
110
120
120
130
130
100
130
130
130
160
170
180
180
200
220
220
80
85
95
110
110
240
35
50
50
70
80
120
160
110
110
117
118
119
120
120
130
130
130
130
130
130
130
140
160
-
90
100
100
100
110
130
150
150
150
160
160
170
180
180
190
190
190
215
215
215
215
215
240
240
240
240
260
260
280
280
150
200
200
200
240
260
280
280
310
340
340
170
180
200
240
240
320
100
130
130
180
200
310
270
215
215
240
240
240
240
240
240
240
250
250
250
250
260
300
320
215
240
240
240
240
250
300
23
25
25
25
27
31
35
35
35
37
37
39
41
41
43
43
43
47
47
47
47
47
50
50
50
50
55
55
58
58
24
33
33
33
38
42
46
46
51
56
56
39
60
67
80
80
48
25
31
31
42
48
72
168
73
73
160
160
160
160
160
160
160
160
80
80
160
172
102
102
73
80
80
80
80
80
102
79.9
97.4
97.4
97.4
110
150
205
205
205
240
240
253
288
288
311
311
311
381
381
381
381
381
443
443
443
443
543
549
607
607
89
163
163
163
230
277
336
336
395
650
650
353
368
390
667
667
363
75.7
139
139
240
316
677
1000
773
773
946
946
946
946
946
951
951
1028
609
609
1028
1212
1554
1630
459
560
560
563
563
626
990
77.5
98.3
98.3
98.3
112
157
222
222
222
263
263
277
325
325
349
349
349
427
427
427
427
427
513
513
513
513
644
644
722
722
120
221
221
221
328
400
479
479
590
1047
1047
425
446
491
868
868
689
69.4
136
136
253
339
776
1760
1188
1188
1464
1464
1484
1484
1484
1620
1620
1660
816
816
1660
1932
2460
2676
607
755
755
823
823
885
1250
0.745
0.897
1.022
1.035
1.297
2.121
2.822
3.208
3.213
3.84
3.82
4.27
5.8
5.4
6.44
6.14
5.4
8.53
8.6
8.6
8.6
8.23
11.03
11.9
11.66
11.03
14.99
14.84
18.9
18.65
1.37
3.76
3.76
3.76
6.04
8.74
10.52
10.52
14.1
18.7
18.5
6.6
7.6
9.3
19.27
19.27
11.20
1.17
2.25
2.25
5.9
7.5
29.92
39.21
26.04
25.34
34.7
34.46
34.22
33.98
31.7
32.74
30.08
37.7
18.874
18.874
37.75
37.7
71.62
81.57
9.823
12.780
11.636
12.47
11.143
14.249
27.476
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Spherical roller bearings
23040 MBW33P6L
23226 MBP63L
23234 CC3L
23234 CC3W33L
23234 CC3W33-168L
23234 CC3W33-169L
24132 CC3W33L
24132 CC3W33-158L
24132 CC3W33-159L
24132 MBW33L
24136CC3L
24136CC3-178L
24136CC3-179L
24136CC3W33L
24136CC3W33-178L
24136CC3W33-179L
25126 MBKC3L
25128 MBKC4L
25129 CYC3L
25226 CC3L
25226 CYC3W33L
25326 CC3L
22326 MBL
23034 MBKC3L
23036 MBKC3L
23040 MBKC3L
23040 MBC3L
23956 MBC3W33L
230
130
170
170
168
169
160
158
159
160
180
178
179
180
178
179
130
140
144.475
131.796
131.796
130
130
170
180
200
200
180
310
230
310
310
310
310
270
270
270
270
300
300
300
300
300
300
240
260
250
220
220
220
280
260
280
310
310
250
82
80
110
110
110
110
109
109
109
109
118
118
118
118
118
118
80
86
80
73
73
73
93
67
74
82
82
52
760
760
1460
1460
1460
1460
1250
1250
1250
940
1460
1460
1460
1460
1460
1460
572
663
728
561
561
561
1080
680
800
760
760
454
1350
1170
2320
2320
2320
2320
2110
2110
2110
1558
2590
2590
2590
2590
2590
2590
1104
1288
1210
934
934
934
1450
1170
1380
1350
1350
830
21.82
14.97
35.82
35.67
35.77
35.77
24.96
25.040
25.040
25.38
33.52
33.52
33.52
33.42
33.42
33.42
15.314
19.960
16.53
11.192
11.172
11.35
28.59
14.22
17.15
21.92
22.02
7.79
Internal Design
B - Asymmetrical rollers
C - Symmetrical rollers
E - Max. capacity symmetrical
R - Bearings without inner rings
M - Machined brass cage, roller centred
MA - Machined brass cage, outer ring centred
MB - Machined brass cage, inner ring centred
TN - Injection moulded cage of glass fibre reinforced polyamide 6.6
Bore Type
K - Tapered bore ratio 1:12
No code - Cylindrical
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Cage
Radial Clearance
No code - Standard
C3 - Greater than Standard
C4 - Greater than C3
Running accuracy
Lubrication
P6 - Dimensional and running
accuracy to ISO tolerance class 6
P63 - P6 +C3
W33 - Annular groove and three lubrication holes
in the outer ring
2RSR - Bearing with 2 seals
2 ZR - Bearing with 2 shield
2 Z - Bearing with 2 shields and recess on the bearing
Destination
TR- traction motor bearings
L - Locomotive bearings
EL - Motors bearings
S0 - Bearing rings stabilized for use at operating temperature up to +1500
Calculation of rating life
Bearing life shall be calculated using ISO 281:2007.
For the calculation of roller bearing life the standard life equation is should be used
according ISO 281:2007.
where
L10 = basic rating life, millions of revolutions;
L10h = basic rating life, hours;
C = basic dynamic load rating according to ISO 281, kN;
P = dynamic equivalent bearing load, kN;
n = rotational speed, r/min;
p = life exponent ( 3 for ball bearings and 10/3 for roller
bearings)
Technical Information
This publication is primarily geared towards manufacturers and operators of rail vehicles who use journal roller bearings,
traction motor bearings and transmission bearings.
The following pages contain our product ranges for journal roller bearings, axle box bearings, transmissions and traction
motors.
The quality demands we place on our products and services are the result of more than 56 years experience in the
production of precision components for rail applications.
Through research and development, their performance has been adapted to meet the high requirements of modern rail
vehicles.
We offer a large ranges of bearings (ball bearings and roller bearings) for rail application:
URB bearings for railway vehicles according UIC 510-1, EN 12080 and EN 12082:
Designation
d
Dimensions
mm
D
B
Basic radial
kN
dyn.
stat.
Weight
kg
Risk class
2.4
3.1
3.8
48
6.7
10.8
15.6
7.9
24
0.032
0.037
0.046
0.07
0.105
0.197
0.29
0.158
0.641
1B
1B
1B
1B
1B
1B
1B
1B
1B
22.2
27.7
50.2
50.2
50.2
51.6
249
306
306
256
343
343
343
412
412
443
479
479
550
550
550
550
666
314
345
345
345
418
418
418
516
516
609
726
726
37
37
47
65.4
65.4
77.5
0.132
0.158
0.31
0.33
0.33
0.514
3.24
3.55
3.88
4.5
5.29
5.69
5.57
6.46
6.43
7.45
9.1
9.1
11.67
12.1
12.1
11.67
14.84
3.58
4.29
4.38
4.42
5.15
5.22
4.77
7.22
7.86
9.16
11.6
11.6
0.296
0.296
0.445
0.596
0.584
0.744
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
Radial ball bearing
6200 2RSRP6ELL
6201 2RSRP6ELL
6202 2RSRP6ELL
6203 2RSRP6ELL
6204 2RSRP6ELL
6206 2ZRL
6207 2ZL
6304 P64L
6308 C3L
10
12
15
17
20
30
35
20
40
30
32
35
40
47
62
72
52
90
9
10
11
12
14
16
17
15
23
5.1
6.9
7.8
26
12.8
19.3
25.7
15.9
40.8
Cylindrical roller bearing
NU204 EMA6C3L
NU205 EMA6L
NU207 EL
NU207 EMAC4L
NJ207 EMAC3L
NJ208 EMAC4L
NJ219 EMP63TR
NJ220 EP62L
NUP220 EMAP63L
NU221 MAS0C3L
NU222 EMP63L
NU222 EMAP63L
NUP222 EMC4TR
NU224 EMC3L
NU224 EMAP63L
NU226 EMAP63L
NU228 EMC3L
NU228 EMAP63S0L
NU230 EMAP63S0L
NUP230 EMP63L
NUP230 EMP63TR
NUP230EMAP63TR
NU232 EMAC3S0L
NU2218 EMAC3L
NU2219 EMP63TR
NJ2219 EMP63TR
NUP2219 EMP63TR
NU2220 EMP63TR
NJ2220 EMAP63L
NJP2220 EMAP63L
NU2222EMAP63S0L
NUP2222 EMAP63L
NU2224 EMAP63L
NU2226 EMAP63L
NU2226 EMC3L
NU305 EMAC3L
NJ305 EMAC3L
NU306 EMAC3L
NU307 EMAC3L
NU307 EML
NU308 EMAC3L
20
25
35
35
35
40
95
100
100
105
110
110
110
120
120
130
140
140
150
150
150
150
150
90
95
95
95
100
100
100
110
110
120
130
130
25
25
30
35
35
40
47
52
72
72
72
80
170
180
180
190
200
200
200
215
215
230
250
250
270
270
270
270
290
160
170
170
170
180
180
180
200
200
215
230
230
62
62
72
80
80
90
14
15
17
17
17
18
32
34
34
36
38
38
38
40
40
40
42
42
45
45
45
45
48
40
43
43
43
46
46
46
53
53
58
64
64
17
17
19
21
21
23
25.7
29.3
50.3
50.3
50.3
52.6
210
249
249
210
279
279
279
329
329
356
372
372
422
422
422
422
498
242
273
273
273
319
319
319
383
383
446
523
523
41.2
41.2
50.5
66.7
66.7
79.9
NU308 EMC3L
NU309 EP63L
NU309 EMC3L
NU309 EMAP63L
NU310 EMAP63L
NU312 EMAC3L
NU314 EC4L
NU314 EMA6P63L
NU314 EM6P63L
NU315 EMP63TR
NUP315 EMP63TR
NU316 EMAP63L
NU317 EMAC3L
NUP317 EMAP63L
NU318 EMA P64L
NJ318 EMC3L
NJ318 EMAC3L
NU320 EMP63L
NU320 EMAP63L
NJ320 EMC3L
NJ320 EMAC3L
NUP320 EMP63TR
NU322EC3L
NU322 EMAP63L
NU322 EMP63L
NU322 EMAP63S0L
NJ324 EMC3L
NU324 EMP63L
NU326 EM6C3L
NU326 EMAP63L
NU1020 MAC3L
NU1026 MC4L
NU1026 MAC3L
NU1026 MAC4S0L
NU1032 MAP63L
NU1034 MC3L
NU1036 MC3L
NU1036 MC3TR
NU1040 MP63L
NU1044 MAP63L
NU1044 MAP63S0L
NU2316 EMAP63L
NU2317 EMA6P63L
NU2319 MAP63L
NU2322 EMAP63L
NU2322 EMAS0P63L
NU2948 MAP63L
NU407 MAP63L
NU410 MAC3L
NU410 MAS0C3L
NU414 MAP63L
NU416 MAP63L
NU424 MP64TR
487632 MASC4
WJ+WUJ110/215 MC3
WJ+WJP 110/215 MC3
WJ+WJP117/240 MC4
WJ+WJP118/240 MC4
WJ+WJP119/240 MC4
WJ+WJP120/240 MC3
WJ+WJP120/240 TNC3
WJ+WJP130/240 MC3
WJ+WJP130/240 TNC3
WJ+WJP130/250 MC4
WJ130/250 F
WJP130/250 F
WJ+WJP130/250 F
WJ+WJP130/260M6C4
WJ+WJP140/300 MC4
WJ+WJP160/320 MC4
RWJ110/215 M
RWJ120/240 M
RWJ120/240 TN
RWJ130/240 M
RWJ130/240 TN
RWJ130/250 M
RWJ140/300 M
40
45
45
45
50
60
70
70
70
75
75
80
85
85
90
90
90
100
100
100
100
100
110
110
110
110
120
120
130
130
100
130
130
130
160
170
180
180
200
220
220
80
85
95
110
110
240
35
50
50
70
80
120
160
110
110
117
118
119
120
120
130
130
130
130
130
130
130
140
160
-
90
100
100
100
110
130
150
150
150
160
160
170
180
180
190
190
190
215
215
215
215
215
240
240
240
240
260
260
280
280
150
200
200
200
240
260
280
280
310
340
340
170
180
200
240
240
320
100
130
130
180
200
310
270
215
215
240
240
240
240
240
240
240
250
250
250
250
260
300
320
215
240
240
240
240
250
300
23
25
25
25
27
31
35
35
35
37
37
39
41
41
43
43
43
47
47
47
47
47
50
50
50
50
55
55
58
58
24
33
33
33
38
42
46
46
51
56
56
39
60
67
80
80
48
25
31
31
42
48
72
168
73
73
160
160
160
160
160
160
160
160
80
80
160
172
102
102
73
80
80
80
80
80
102
79.9
97.4
97.4
97.4
110
150
205
205
205
240
240
253
288
288
311
311
311
381
381
381
381
381
443
443
443
443
543
549
607
607
89
163
163
163
230
277
336
336
395
650
650
353
368
390
667
667
363
75.7
139
139
240
316
677
1000
773
773
946
946
946
946
946
951
951
1028
609
609
1028
1212
1554
1630
459
560
560
563
563
626
990
77.5
98.3
98.3
98.3
112
157
222
222
222
263
263
277
325
325
349
349
349
427
427
427
427
427
513
513
513
513
644
644
722
722
120
221
221
221
328
400
479
479
590
1047
1047
425
446
491
868
868
689
69.4
136
136
253
339
776
1760
1188
1188
1464
1464
1484
1484
1484
1620
1620
1660
816
816
1660
1932
2460
2676
607
755
755
823
823
885
1250
0.745
0.897
1.022
1.035
1.297
2.121
2.822
3.208
3.213
3.84
3.82
4.27
5.8
5.4
6.44
6.14
5.4
8.53
8.6
8.6
8.6
8.23
11.03
11.9
11.66
11.03
14.99
14.84
18.9
18.65
1.37
3.76
3.76
3.76
6.04
8.74
10.52
10.52
14.1
18.7
18.5
6.6
7.6
9.3
19.27
19.27
11.20
1.17
2.25
2.25
5.9
7.5
29.92
39.21
26.04
25.34
34.7
34.46
34.22
33.98
31.7
32.74
30.08
37.7
18.874
18.874
37.75
37.7
71.62
81.57
9.823
12.780
11.636
12.47
11.143
14.249
27.476
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Spherical roller bearings
23040 MBW33P6L
23226 MBP63L
23234 CC3L
23234 CC3W33L
23234 CC3W33-168L
23234 CC3W33-169L
24132 CC3W33L
24132 CC3W33-158L
24132 CC3W33-159L
24132 MBW33L
24136CC3L
24136CC3-178L
24136CC3-179L
24136CC3W33L
24136CC3W33-178L
24136CC3W33-179L
25126 MBKC3L
25128 MBKC4L
25129 CYC3L
25226 CC3L
25226 CYC3W33L
25326 CC3L
22326 MBL
23034 MBKC3L
23036 MBKC3L
23040 MBKC3L
23040 MBC3L
23956 MBC3W33L
230
130
170
170
168
169
160
158
159
160
180
178
179
180
178
179
130
140
144.475
131.796
131.796
130
130
170
180
200
200
180
310
230
310
310
310
310
270
270
270
270
300
300
300
300
300
300
240
260
250
220
220
220
280
260
280
310
310
250
82
80
110
110
110
110
109
109
109
109
118
118
118
118
118
118
80
86
80
73
73
73
93
67
74
82
82
52
760
760
1460
1460
1460
1460
1250
1250
1250
940
1460
1460
1460
1460
1460
1460
572
663
728
561
561
561
1080
680
800
760
760
454
1350
1170
2320
2320
2320
2320
2110
2110
2110
1558
2590
2590
2590
2590
2590
2590
1104
1288
1210
934
934
934
1450
1170
1380
1350
1350
830
21.82
14.97
35.82
35.67
35.77
35.77
24.96
25.040
25.040
25.38
33.52
33.52
33.52
33.42
33.42
33.42
15.314
19.960
16.53
11.192
11.172
11.35
28.59
14.22
17.15
21.92
22.02
7.79
Internal Design
B - Asymmetrical rollers
C - Symmetrical rollers
E - Max. capacity symmetrical
R - Bearings without inner rings
M - Machined brass cage, roller centred
MA - Machined brass cage, outer ring centred
MB - Machined brass cage, inner ring centred
TN - Injection moulded cage of glass fibre reinforced polyamide 6.6
Bore Type
K - Tapered bore ratio 1:12
No code - Cylindrical
1B
1B
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
1A
Cage
Radial Clearance
No code - Standard
C3 - Greater than Standard
C4 - Greater than C3
Running accuracy
Lubrication
P6 - Dimensional and running
accuracy to ISO tolerance class 6
P63 - P6 +C3
W33 - Annular groove and three lubrication holes
in the outer ring
2RSR - Bearing with 2 seals
2 ZR - Bearing with 2 shield
2 Z - Bearing with 2 shields and recess on the bearing
Destination
TR- traction motor bearings
L - Locomotive bearings
EL - Motors bearings
S0 - Bearing rings stabilized for use at operating temperature up to +1500
Calculation of rating life
Bearing life shall be calculated using ISO 281:2007.
For the calculation of roller bearing life the standard life equation is should be used
according ISO 281:2007.
where
L10 = basic rating life, millions of revolutions;
L10h = basic rating life, hours;
C = basic dynamic load rating according to ISO 281, kN;
P = dynamic equivalent bearing load, kN;
n = rotational speed, r/min;
p = life exponent ( 3 for ball bearings and 10/3 for roller
bearings)
It is possible to convert the bearing life to vehicle running distance.
where
Dw = wheel diameter, m;
L10s = bearing life expressed as vehicle running distance, millions
of km;
For performing calculation modified life we developed a program for computer which consider the
fatique stress limit of the bearing steel and make it easy to estimate the influence of lubrication and
contamination on bearing life.
Recommended life values for axleboxes bearings
Type of vehicle
Freight cars 1)
Local traffic vehicles
Passenger coaches rail cars for district traffic 2)
Rail cars for long distance traffic
Locomotives
1)
2)
L10s
mill.km
1,7
1,5 to 2
2,0 to 4
3,0 to 5
2,0 to 5
Dw
m
0,9
0,7
0,9
1,0
1,2
C/P
6,8
7,1 to 7,7
7,2 to 8,8
7,8 to 9,1
6,6 to 8,6
URB GROUP
The company was set-up on May 1953 and it has a long tradition in manufacturing
of bearings over 56 years, being one of the important bearing manufacturers
in the Central and South-East Europe. We manufactured and trade under URB,
KRS brands or on customer request, a wide range of bearings utilized
in automobiles, steel mills, electric motors, speed reducers, mining industry,
construction machinery.
URB Railway Bearings
Double Row Cylindrical Roller Bearings
Ball Bearings
Double Row Cylindrical Roller Bearings with Ribs
Spherical Roller Bearings
Cylindrical Roller Bearing Specified By UIC
According to UIC: L10s = 0.8 million km under constant full payload
According to UIC: L10s = 3,0 million km
Laboratory test
Our laboratory test types:
- tests for confirmation of basic dynamic load rating or rating life estimation for bearings from
currently manufacture;
- tests of rating life, required by customers;
- tests on research problems (for verification of theoreticaly aspects regarding bearings design)
URB GROUP
Double row Cylindrical Roller Bearings Standardized By UIC
Our company
manufacture the bearings for modern railway systems must offer excellent durability and
high-speed capability with minimal maintenance requirements.
Guarantee
URB Group quaranty of good operating bearings for two years after delivery.
Certificates
The main target of our company is to meet our customers requirements, offering high quality
products at competitive prices. We have a set of advanced scientific management system, advanced
bearing production equipment, ISO 9001 and ISO 14001 certification with TÜV Thuringen Germany.
www.urb.ro
URB GROUP
320 Republicii Street, 731108 Barlad, ROMANIA
phone: +40 235 / 411120, 412120 fax: +40 235 / 413838, 308200
sales@urb.ro
www.urb.ro
It is possible to convert the bearing life to vehicle running distance.
where
Dw = wheel diameter, m;
L10s = bearing life expressed as vehicle running distance, millions
of km;
For performing calculation modified life we developed a program for computer which consider the
fatique stress limit of the bearing steel and make it easy to estimate the influence of lubrication and
contamination on bearing life.
Recommended life values for axleboxes bearings
Type of vehicle
Freight cars 1)
Local traffic vehicles
Passenger coaches rail cars for district traffic 2)
Rail cars for long distance traffic
Locomotives
1)
2)
L10s
mill.km
1,7
1,5 to 2
2,0 to 4
3,0 to 5
2,0 to 5
Dw
m
0,9
0,7
0,9
1,0
1,2
C/P
6,8
7,1 to 7,7
7,2 to 8,8
7,8 to 9,1
6,6 to 8,6
URB GROUP
The company was set-up on May 1953 and it has a long tradition in manufacturing
of bearings over 56 years, being one of the important bearing manufacturers
in the Central and South-East Europe. We manufactured and trade under URB,
KRS brands or on customer request, a wide range of bearings utilized
in automobiles, steel mills, electric motors, speed reducers, mining industry,
construction machinery.
URB Railway Bearings
Double Row Cylindrical Roller Bearings
Ball Bearings
Double Row Cylindrical Roller Bearings with Ribs
Spherical Roller Bearings
Cylindrical Roller Bearing Specified By UIC
According to UIC: L10s = 0.8 million km under constant full payload
According to UIC: L10s = 3,0 million km
Laboratory test
Our laboratory test types:
- tests for confirmation of basic dynamic load rating or rating life estimation for bearings from
currently manufacture;
- tests of rating life, required by customers;
- tests on research problems (for verification of theoreticaly aspects regarding bearings design)
URB GROUP
Double row Cylindrical Roller Bearings Standardized By UIC
Our company
manufacture the bearings for modern railway systems must offer excellent durability and
high-speed capability with minimal maintenance requirements.
Guarantee
URB Group quaranty of good operating bearings for two years after delivery.
Certificates
The main target of our company is to meet our customers requirements, offering high quality
products at competitive prices. We have a set of advanced scientific management system, advanced
bearing production equipment, ISO 9001 and ISO 14001 certification with TÜV Thuringen Germany.
www.urb.ro
URB GROUP
320 Republicii Street, 731108 Barlad, ROMANIA
phone: +40 235 / 411120, 412120 fax: +40 235 / 413838, 308200
sales@urb.ro
www.urb.ro