performance test data - ntn snr · · 2017-03-10performance test data ... ntn-snr rulmenti / zona...
TRANSCRIPT
Performance Test Data
ULTAGE Sealed Four Row Tapered Roller Bearings for Rolling Mill Roll-Necks [CROU..LL Type]
●Water Resistance Durability Test
[Test conditions] Bearing number: ULTAGE sealed four row tapered roller bearing CROU-6001LLAX1 (Dimensions:φ300×φ420×310, Cr: 3600 kN, C0r: 7650 kN) Prelubricating grease: Palmax RBG Radial load: 390 kN (0.11 Cr) Running speed: Cyclic operation where one cycle consists of ⇒300 min-1 (0.5 h) ⇒ 500 min-1 (1 h) ⇒ standstill (1 h) Water spray: 0.15 L/min Total running hours: 1000 h
●Life test result
[Test conditions] Bearing number: Comparison of conventional design and ULTAGE in terms of life 30316U (dimensions:φ80×φ170×42.5) Lubrication: Turbine Oil VG68, circulating lubrication Combined radial and axial loads: 117 kN/bearing (0.4 Cr equivalent, radial load: 75 kN/bearing, axial load: 50 kN/bearing) Running speed: 2000 min-1
Misalignment: 1/600 (0.1˚)
Structure of test rig
Appearance of test rig
Rollers on side A Outer ring on side B Outer ring on side C Outer ring on side DRollers on side D
0.03% 0.02% 0.02% 0.03% 0.02%
0.27% 0.03% 2.01% 0.03% 0.04%
Appearance ofassembled inner ring
Appearance ofouter ring
Flaking
Flaking
No damage
No damage
Status
Structure of test rig
ULTAGE bearings boast a life 2.6 times as long as their design life, and twice as long as the life of conventionalbearings, when both bearing types are tested under test conditions of 0.4 Cr and 1/600 misalignment.
A B C D
Load
Test bearing
Test bearing 2Test bearing 1
Waterspray
Fr
Fa
Flaking occurred nearthe chamfered end ofrollers as well as at thecorresponding contactpoint on the outer ring.(L10 = 225 h)
After termination of thetest at 690 hours, thetest bearing was freefrom any failuresincluding flaking.
[Test result]
Conventional designL10 life 225 h(n = 6)
CalculatedL10 life173 h
ULTAGE designMinimum L10 life 450 h(n = 6)
99
80
50
20
10
5
1101 102 103 104
Cum
ulat
ive
frac
ture
pro
babi
lity
(%)
Life (h)
[Status of bearing interior after test, and water content in grease (wt%)]* Water content in factory-fresh grease is in the range of 0.001% to 0.04%.
Con
vent
iona
lse
alH
igh
sea
ling
seal
Evidence of water intrusion is found on the conventional seal. In contrast, the NTN “high sealing”seal does not exhibit evidence of water intrusion.
Con
vent
iona
lde
sign
ULT
AG
E
HEADQUARTERSNTN Corporation URL http://www.ntn.co.jp1-3-17, Kyomachibori, Nishi-ku, Osaka-shi, Osaka 550-0003 Japan
Phone: +81-6-6443-5001
NTN USA Corporation URL http://www.ntnamerica.com1600 E. Bishop Court, P.O. Box 7604, Mount Prospect, IL 60056-7604, U.S.A. Phone: +1-847-298-7500 Fax: +1-847-294-1209
SALES NETWORKNTN Bearing Corp. of AmericaHead Office / 1600 E. Bishop Court, P.O. Box 7604, Mount Prospect, IL 60056-7604, U.S.A. Phone: +1-847-298-7500 Fax: +1-847-699-9744Central Sales Office / 2413 North Main Street, East Peoria, Illinois 61611 Phone: +1-309-699-8600 Fax: +1-309-699-8670NTN Automotive Center / 39255 W. 12 Mile Road, Farmington Hills, MI 48331-2975, U.S.A. Phone: +1-248-324-4700 Fax: +1-248-324-1103
NTN Bearing Corp. of Canada Ltd. URL http://www.ntn.caHead Office / 305 Courtneypark Drive West, Mississauga, Ontario, L5W 1Y2, Canada Phone: +1-905-564-2700 Fax: +1-905-564-7749Vancouver Branch / 106B - 3680 Bonneville Place Burnaby, B.C. V3N 4T6, Canada Phone: +1-604-444-2007 Fax: +1-604-444-2665Edmonton Branch / 4608-97th Street, Edmonton, Alberta T6E 5N9, Canada Phone: +1-780-435-6200 Fax: +1-780-435-3600Toronto Branch / 305 Courtneypark Drive West, Mississauga, Ontario L5W 1Y4, Canada Phone: +1-905-564-9600 Fax: +1-905-564-9609Montreal Branch / 4973 Levy Street, Ville, St-Laurent, Quebec, H4R 2N9, Canada Phone: +1-514-333-8054 Fax: +1-514-333-1078
NTN Wälzlager (Europa) GmbH.URL http://www.ntn-snr.comHead Office / Max-Planck-Str. 23, 40699 Erkrath, F.R. Germany Phone: +49-211-2508-0 Fax: +49-211-2508-400Stuttgart Branch / Plieninger Str. 63B, 70794 Filderstadt F.R. Germany Phone: +49-711-123901-0 Fax: +49-711-123901-660München Branch / Parkring 4, 85748 Garching (München), F.R. Germany Phone: +49-211-2508-0 Fax: +49-211-2508-555Hamburg Branch / Barkhausenweg 7, 22339 Hamburg, F.R. Germany Phone: +49-211-2508-0 Fax: +49-211-2508-415Italy Branch / Via Maestri del Lavoro, 3/A, 40138 Bologna, Italy Phone: +39-051-535174 Fax: +39-051-538492
NTN Bearings (UK) Ltd. URL http://www.ntn-snr.comWellington Crescent, Fradley Park, Lichfield, Staffordshire, WS13 8RZ, U.K. Phone: +44-1543-445000 Fax: +44-1543-445035
NTN-SNR ROULEMENTS. URL http://www.ntn-snr.comHead Office / 1, rue des Usines B.P. 2017 74010 Annecy Cedex, France Phone: +33-4-50-65-30-00 Fax: +33-4-50-65-32-91Lyon Branch / Le Florentin, 71, Chemin du Moulin Carron, BP8-69570 DARDILLY, France Phone: +33-4-78-66-68-00 Fax: +33-4-78-66-68-20Paris Branch / 6, rue Auguste Comte, BP49, 92174 Vanves Cedex, France Phone: +33-1-40-93-66-00 Fax: +33-1-40-93-66-10Cran Gevrier Branch / 6 route de la Salle, 74960, Cran Gevrier, France Phone: +33-4-50-65-93-00 Fax: +33-4-50-65-93-46
SNR Wälzlager GmbH. Duesseldorf Branch / Max-Planck-Str. 23, 40699 Erkrath, F.R.Germany Phone: +49-211-2508-0 Fax: +49-211-2508-400 Bielefeld Branch / Friedrich-Hagemann-Straße 66, 33719 Bielefeld, Germany Phone: +49-521-9-24-00-0 Fax: +49-521-9-24-00-90 Stuttgart Branch / Plieninger Str. 63B, 70794 Filderstadt F.R.Germany Phone: +49-711-123901-0 Fax: +49-711-123901-660
SNR Italia / Via Riccardo Lombardi, 19/4, 20153 Milan, Italy Phone: +39-02-47-99-86-00 Fax: +39-02-33-50-06-56NTN-SNR Rodamientos Ibérica / Calle Barberán n˚6, 28035 Madrid, Spain Phone: +34-916-71-89-13 Fax: +34-916-73-65-48NTN-SNR Rulmenti / Zona Industriala-Vest, 6 Strada Salzburg, 24 00 SIBIU, Romania Phone: +40-269-20-35-00 Fax: +40-269-20-35-25NTN-SNR Marocco / 73, boulevard Moulay Slimane, Ain Sebaâ Casablanca, BP 15873 Casa-Principal, Marocco Phone: +212-522-66-76-80 Fax: +212-522-66-5166
NTN Bearing-Singapore (Pte) Ltd. URL http://www.ntn.com.sgHead Office / No.9 Clementi Loop Singapore 129812 Phone: + 65-64698066 Fax: +65-64695400Philippine Representative Office / Unit 1002 Philippine Axa Life Centre Condominium Corporation Sen. Gil Puyat Ave Corner Tindalo Street Makati City, Philippines Phone: +63-2-759-4407 Fax: +63-2-759-4409India Representative Office / 805, International Trade Tower, Nehru Place, New Delhi 110019, India Phone: +91-11-51513234 Fax: +91-11-51513236Indonesia Representative Office / Summitmas 1., 18th Floor, Jl. Jend. Sudirman Kav. 61-62, Jakarta 12190, Indonesia Phone: +62-21-252-2081 Fax: +62-21-252-2082Vietnam Representative Office / 303, 3rd of Thanh Dong Building 132 - 138 Kim Ma Str., Ba Dinh Dist., Ha Noi, Viet Nam Phone: +84-4-37347661 Fax: +84-4-37347662
NTN (China) Investment Corp. URL http://www.ntn.com.cnShanghai Head Office / No.6 building No.1666 Nanle Road, Songjiang Industrial Zone, Songjiang, Shanghai, China Phone: +86-21-5774-5500 Fax: +86-21-5778-2898Beijing Branch / Units 08, EF floor, West Tower, LG Twin Tower, 12 Jian Guo Men Wai Yi, Chaoyang District, Beijing, China 100022 Phone: +86-10-6568-3069 Fax: +86-10-6568-2278Guangzhou Branch / Rm 7306 CiticPlaza, 233 Tianhe North Road, Guangzhou, China 510613 Phone: +86-20-3877-2943 Fax: +86-20-3877-2942Nanjing Branch / 18A, Nanjing IFC, NO.1 Hanzhong Rd, Baixia district, Nanjing, CHINA 210029 Phone: +86-25-8477-5355 Fax: +86-25-8477-5360
NTN China Ltd. URL http://www.ntnchina.comHong Kong Office / Room 1914-15, Park-In Commercial Centre, 56 Dundas Street, Mongkok, Kowloon, Hong Kong Phone: +852-2385-5097 Fax: +852-2385-2138
NTN Bearing-Thailand Co., Ltd.Head Office / 12th Floor, Panjathani Tower, 127/15 Nonsee Road, Chongnonsee Yannawa, Bangkok 10120, Thailand Phone: +66-2-681-0401 Fax: +66-2-681-0408Khon Kaen Branch / 189-191 Ruen Rom Road Tambon Nai-Muang, Amphur Muang, Kohn Kaen, 40000, Thailand Phone: +66-43-223679 Fax: +66-43-223061Haad Yai Branch / 198-198/1 Nipat U-Thid 2 Road, Amphur Haad Yai, Songkhla, 90110, Thailand Phone: +66-74-236568 Fax: +66-74-231520Bangna Branch / 35/35 Bangna-Trad Road, KM11 Bangplee, Samutprakarn, 10540, Thailand Phone: +66-2-7501732 Fax: +66-2-7501731Chiangmai Branch / 46/8-10 Thy wang Rd. Changmoi sub.district, Munag district, Chiangmai province, 50300 Thailand Phone: +66-53-874328 Fax: +66-53-874330
NTN Bearing-Malaysia Sdn. Bhd.Head Office / No.2, Jalan Arkitek U 1/22, Hicom Glenmarie Industrial Park, 40150 Shah Alam, Selangor, Malaysia Phone: +60-3-55696088 Fax: +60-3-55690200Butterworth Branch / 4700, Jalan Permatang Pauh, 13400 Butterworth, Malaysia Phone: +60-4-3328312 Fax: +60-4-3324407Ipoh Branch Office /65, Medan Kidd, Kinta Mansion, 30200 Ipoh, Malaysia Phone: +60-5-2547743 Fax: +60-5-2538077Kuantan Branch / B-72, Ground Floor, Jalan Beserah 25300 Kuantan, Malaysia Phone: +60-9-5141132 Fax: +60-9-5141164Johor Bahru Branch / 51 Jalan, Sri Bahagia 5, Taman Sri Bahagia, Tampoi, 81200 Johor Bahru, Malaysia Phone: +60-7-2364929 Fax: +60-7-2370897
PT. NTN Bearing IndonesiaC-21, 22 MM2100 Industrial Town, Cikarang Barat, BEKASI 17520 West Jave Indonesia Phone : +62-21-252-2081 Fax : +62-21-252-2082
NTN-CBC (Australia) Pty. Ltd.3, The Crescent, Kingsgrove, NSW 2008, Australia Phone: +61-2-99479200 Fax: +61-2-95543311
NTN de Mexico, S.A. URL http://www.ntnmexico.com.mxMexico Head Office / Emilio Cárdenas No.158 Apdo.124, C.P.54030, Tlalnepantla, Edo.deMéxico, Mexico Phone: +52-55-5390-1133 Fax: +52-55-5565-8545Guadalajara Branch / Calle 22 No.2465, Zona Industrial, C.P.44940, Guadalajara, Jalisco, Mexico Phone: +52-33-3145-1448 Fax: +52-33-3145-1594Monterrey Branch / Av. Ruiz Cortines No.1336 Ote, Col. La Purisima, C.P.67120, Cd. Guadalupe, Nuevo Leon, Mexico Phone: +52-818-334-9931 Fax: +52-818-334-9932Mexicali Branch / Blvd. Benito Juárez No.3293 Esq. Ayuntamiento, C.P.21360, Mexicali, BCN, Mexico Phone: +52-686-563-3632 Fax: +52-686-582-2057Veracruz Branch / María Auxiliadora No.687 Esq. J.F.Molina, C.P.91870, Col. Los Pinos, Veracruz, Mexico Phone: 52-229-934-4757 Fax: +52-229-938-0457
NTN Sudamericana, S.A.URL http://www.ntnsudamericana.comWorld Trade Center Panama Calle 53 Este, Urbanización Marbella Piso NO.16, Oficina 1601 Apartado Postal 832-0487, Panamá, Rep.de Panamá Phone: +507-269-4777 Fax: +507-264-5592
NTN do Brasil Ltda. URL http://www.ntn.com.brAv. Moema, 94-9˚ Andar-conj, 92a94 CEP 04077-020-Indianópolis-São Paulo-SP, -Brasil Phone: +55-11-5051-0600 Fax: +55-11-5051-2807
NTN Korea Co., Ltd.Head Office / 10th Floor, Press Center, 25, Taepyeong-Ro 1-GA, Jung-Gu, Seoul 100-745, Korea Phone: +82-2-720-3665 Fax: +82-2-720-3669Busan Branch / Rm.707, 7th Floor, Daerim Bldg., 341-5 Bujeon 1-Dong, Busanjin- Gu, Busan, Korea, 614-843 Phone: +82-51-811-1351 Fax: +82-51-811-1353
NOTE : The appearance and specifications may be changed without prior notice if required to improve performance. Although care has been taken to assure the accuracy of the data compiled in this catalog, NTN does not assume any liability to any company or person for errors or omissions.
AE72 CAT. No. 3801/E 12. 03. 06. NPrinted in Japan
Sealed Four Row Tapered Roller Bearingsfor Rolling Mill Roll-Necks
[CROU..LL Type]
CAT. No. 3801/E
CROU-4401LLA1X
CROU-4501LLA1X
CROU-4801LLA1X
CROU-4802LLA1X
CROU-5001LLA1X
CROU-5201LLA1X
CROU-6001LLA1X
CROU-6201LLA1X
CROU-8201LLA1X
CROU-8801LLA1X
CROU-8802LLA1X
CROU-10601LLA1X※
CROU-4402LLA1X
CROU-5101LLA1X
CROU-6101LLA1X
CROU-6901LLA1X
CROU-6902LLA1X
CROU-10001LLA1X※
CROU-11901LLA1X
220
225
240
240
250
260
300
310
410
440
440
530
220.662
254.000
304.902
343.052
343.052
501.650
595.312
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
+750+900
+1 000+1 200+1 200+1 500+1 500
-750-900
-1 000-1 200-1 200-1 500-1 500
303540455075
100
5060708090
105120
23263034385675
295
320
338
338
365
365
420
430
546
590
620
780
314.325
358.775
412.648
457.098
457.098
711.200
844.550
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
0.093~0.106
0.099~0.115
0.104~0.118
0.107~0.123
0.113~0.129
0.115~0.131
0.131~0.147
0.136~0.154
0.173~0.188
0.188~0.204
0.195~0.211
0.244~0.259
0.098~0.111
0.111~0.127
0.130~0.150
0.136~0.158
0.143~0.163
0.206~0.226
0.266~0.282
0.420~0.480
0.360~0.420
0.450~0.510
0.400~0.460
0.420~0.480
0.430~0.490
0.490~0.550
0.520~0.590
0.780~0.850
0.850~0.920
0.880~0.950
1.100~1.170
0.450~0.510
0.430~0.490
0.450~0.520
0.430~0.500
0.500~0.570
0.730~0.800
1.200~1.270
1
1
1
1
1
1
1
1
1.5
1.5
3
3
1
1
1
1
1
3
3
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Bearingnumbers
Boundary dimensions Standardradial clearance
(approx.)mm
mm mm
(1) Inner rings
mm Δdmp Vdp Vdmp
d
over incl. high lowΔB2s, ΔC2s
high lowmax maxKiamax
d D B C r1s min
1 880
1 870
2 320
2 960
2 760
3 340
3 600
4 020
5 520
6 600
7 600
13 400
2 240
2 760
2 800
2 820
3 500
10 000
13 900
4 650
3 700
4 600
6 850
5 300
7 450
7 650
8 900
13 300
16 200
16 700
29 400
4 350
5 700
5 850
5 950
8 150
23 900
33 000
192 000
190 000
236 000
302 000
280 000
340 000
366 000
410 000
562 000
670 000
780 000
1 370 000
228 000
282 000
286 000
288 000
356 000
1 020 000
1 420 000
475 000
375 000
470 000
700 000
540 000
760 000
780 000
910 000
1 350 000
1 650 000
1 700 000
3 000 000
440 000
580 000
600 000
605 000
830 000
2 440 000
3 350 000
235
241
259
257
272
275
318
329
434
462
473
581
240
274
323
360
364
542
638
267
294
309
299
333
327
382
388
504
540
570
710
290
328
379
423
423
642
770
0.33
0.41
0.35
0.40
0.40
0.40
0.40
0.39
0.33
0.33
0.33
0.33
0.33
0.39
0.43
0.47
0.43
0.42
0.33
2.03
1.64
1.95
1.68
1.68
1.68
1.68
1.72
2.03
2.03
2.03
2.03
2.07
1.74
1.56
1.43
1.57
1.60
2.03
Axial load factorConstantAbutment andfillet dimensions
eda Da Y1
3.02
2.44
2.90
2.50
2.50
2.50
2.50
2.56
3.02
3.02
3.02
3.02
3.09
2.59
2.32
2.12
2.34
2.38
3.02
Y2
1.98
1.6
1.91
1.64
1.64
1.64
1.64
1.68
1.98
1.98
1.98
1.98
2.03
1.70
1.52
1.40
1.53
1.56
1.98
Y0
1 Y1 0.67 Y2
Fa
Fr
X Y X Y
≦eFa
Fr>e
Equivalent radial loaddynamicPr=XFr+YFa
staticPor=Fr+YoFa For values of e, Y1, Y2 and Yo
see the table below.
Dimension Table (For information about bearing models not listed in the Dimension Table, contact NTN Engineering.)
Metric series Tolerances [JIS 0 Class] Inch series Tolerances [ABMA 0 Class]
Standard Prelubricating Grease
Fit (recommended)
Materials
Bearing Number
Chamfer Dimension
Operating Temperature Range
● Brand: Kyodo Yushi Palmax RBG (L373) ● Fill amount: Space volume ratio 35%
● Metric series: Shaft d6/ Housing G7 ● Inch series: Contact NTN Engineering for technical assistance.
Limiting Speed
●dm・N≦30×104
dm:bearing center diameter (mm)=(d+D) /2 d:bearing bore diameter (mm) D:bearing outside diameter (mm) N:running speed (min-1)
● Inner and outer rings: Case hardening steel ● Rolling element: Bearing steel ※ mark only: Case hardening steel
The values above are shown as a guide, and may not bemet under certain operating conditions.For details, contact NTN Engineering.
Features
● -20 to +120˚C(A-) CROU- 6001 LLA1X PX1
Accuracy codeSeal code
Bearing bore number + added numberBearing type (ULTAGE Series four row tapered roller bearing)
Optional (special heat treatment 1) )
NOTE 1) Carbonitriding
76.2266.7304.8609.6
266.7304.8609.6914.4
0000
+25+25+51+76
(1) Inner rings
Δds
over incl. high low
(3) Radial deflection of inner and outer rings
266.7304.8609.6
304.8609.6914.4
+25+51+76
000
(2) Outer rings
over incl. high low
266.7304.8609.6
304.8609.6914.4
515176
Kia, Kea
Radial runout
over incl.
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
303540455075
100
50607080
100120140
23263034385675
(2) Outer rings
mmD
over incl. high low max max max
max
(4) Combination width deviation of 4-row bearings
101.6304.8304.8609.6
304.8609.6609.6―
over incl.
―508.0
508.0―
+1 520+1 520+1 520+1 520
-1 520-1 520-1 520-1 520
over incl. high low
1. High load capacity design —the world’s highest level Maximum size and number of rollers help realize high load capacity and longer life.
2. High load resisting design —the world’s highest level Assurance of uniform contact pressure on rolling elements within bearings and against outside loads has helped greatly enhance load resistance performance.
3. Compact high sealing design “High sealing” fluoro-rubber seals, boasting a minimized seal volume, are adopted as standard. Through optimization of the tightening force of the main lip and the provision of a shielding arrangement against foreign substances, the water intrusion volume has been reduced by more than 50%: at the same time, the sub lip helps prevent the outflow of grease.
4. Long-life grease as standard The bearing is prefilled with long-life grease. A rinsing and/or grease prefilling procedure is not necessary when the bearing is installed on the side of the machine.
40%increase
Loadcapacity
®
1rs min
1
2 Standardaxial clearance
2
[CROU..LL Type]
Patent pending
Patent pending
1.9 350 ― 1
Unit : mm
rs min
or r1s min over incl.
rs max or r1s max
2.83.5
3.54
120250
250― 1.5
44.5
5.56
120250
250―
2.5
4.555.5
6.577.5
120250400
250400―
3
kN kgfC0r C0rCr Cr
mm
φD φd φda φDa
B
r1
r
C
●Design that maximizes load capacity —rollers (size and number) as wells as the cage. ●Newly developed crowning
helps improve load resistance performance.
Conventional design
Conventional design
ULTAGE design
ULTAGE design
Critical contact pressure
Axial position on roller
O-ring O-ring
Main lip Sub lip
Main lip(w/ shielding mechanism)
Fluoro-rubber seal
Shieldingmechanism
New crowning designis adopted for rollingelements.
Conventional crowning
Unit : μm
Unit : μmUnit : μm
Unit : μm
Unit : μm
Unit : μmSealed Four Row Tapered Roller Bearingsfor Rolling Mill Roll-NecksThe ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
The ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
• Compact seal design helpsmaximize bearing side volume.• Maximization in the size andnumber of rollers helps realize
high load capacity.
• Newly developed crowninghelps reduce and ensureuniform contact pressure.• World’s highest level in
load resistanceperformance.
• Newly developed seal lipdesign significantly reduces
water intrusion volume.• Fluoro-rubber seal boasts
more positive sealingperformance.
Twice asgreat
Loadresistance
Sealingperformance50%
reduction in waterintrusion volume
Compact sealcase design
Seals with improvedwater intrusionperformance
Phosphatecoatingon the entiresurface
High loadcapacity design
High loadresistance design
"ULTAGE " (a name created from the combination of "ultimate," signifying refinement,and "stage," signifying NTN's intentionthat this series of products be employed in diverse applications) is the general name for NTN's new generation of bearings thatare noted for their industry-leading performance.
®
®
Newly developed crowning
Contact pressurereduced by halfC
onta
ct p
ress
ure
Excessively highcontact pressure
Side face of innerring or centerwasher, or side faceof outer ring
Bore diameter face of bearing or outer diameter face ofbearing (Axial direction)
rs min or r1s min (Rad
ial d
irect
ion)
rs max or r1s max
rs
min
or r
1s m
in
rs
max
or r
1s m
ax
rs min or r1s min
Nominalbore diameter
d
Radialdirection
Axialdirection
Ser
ies
Met
ric
seri
esIn
ch s
erie
s
Basic load ratingsdynamic static dynamic static
1 Minimum allowable value of chamfer dimension r. 2 Depending on operating conditions, appropriate values may vary. Contact NTN Engineering for technical assistance.
ULTAGE Sealed Four Row Tapered Roller Bearings for Rolling Mill Roll-Necks [CROU..LL Type]
Nominal borediameter
mmd
Nominal borediameter
mmd
Nominal borediameter
Single borediameter deviation
ΔDs
Single outsidediameter deviation
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
Inner ringradial runout
Inner ringradial runout
Combination width deviation of
4-row bearings
ΔB2s, ΔC2s
Combination width deviation of
4-row bearings
Dimensional toleranceof mean bore
diamteter within plane
Dimensional toleranceof mean outside
diamteter within plane
Borediametervariation
Outsidediametervariation
Mean borediametervariation
Mean outsidediametervariation
ΔDmp VDp VDmp Kea
CROU-4401LLA1X
CROU-4501LLA1X
CROU-4801LLA1X
CROU-4802LLA1X
CROU-5001LLA1X
CROU-5201LLA1X
CROU-6001LLA1X
CROU-6201LLA1X
CROU-8201LLA1X
CROU-8801LLA1X
CROU-8802LLA1X
CROU-10601LLA1X※
CROU-4402LLA1X
CROU-5101LLA1X
CROU-6101LLA1X
CROU-6901LLA1X
CROU-6902LLA1X
CROU-10001LLA1X※
CROU-11901LLA1X
220
225
240
240
250
260
300
310
410
440
440
530
220.662
254.000
304.902
343.052
343.052
501.650
595.312
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
+750+900
+1 000+1 200+1 200+1 500+1 500
-750-900
-1 000-1 200-1 200-1 500-1 500
303540455075
100
5060708090
105120
23263034385675
295
320
338
338
365
365
420
430
546
590
620
780
314.325
358.775
412.648
457.098
457.098
711.200
844.550
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
0.093~0.106
0.099~0.115
0.104~0.118
0.107~0.123
0.113~0.129
0.115~0.131
0.131~0.147
0.136~0.154
0.173~0.188
0.188~0.204
0.195~0.211
0.244~0.259
0.098~0.111
0.111~0.127
0.130~0.150
0.136~0.158
0.143~0.163
0.206~0.226
0.266~0.282
0.420~0.480
0.360~0.420
0.450~0.510
0.400~0.460
0.420~0.480
0.430~0.490
0.490~0.550
0.520~0.590
0.780~0.850
0.850~0.920
0.880~0.950
1.100~1.170
0.450~0.510
0.430~0.490
0.450~0.520
0.430~0.500
0.500~0.570
0.730~0.800
1.200~1.270
1
1
1
1
1
1
1
1
1.5
1.5
3
3
1
1
1
1
1
3
3
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Bearingnumbers
Boundary dimensions Standardradial clearance
(approx.)mm
mm mm
(1) Inner rings
mm Δdmp Vdp Vdmp
d
over incl. high lowΔB2s, ΔC2s
high lowmax maxKiamax
d D B C r1s min
1 880
1 870
2 320
2 960
2 760
3 340
3 600
4 020
5 520
6 600
7 600
13 400
2 240
2 760
2 800
2 820
3 500
10 000
13 900
4 650
3 700
4 600
6 850
5 300
7 450
7 650
8 900
13 300
16 200
16 700
29 400
4 350
5 700
5 850
5 950
8 150
23 900
33 000
192 000
190 000
236 000
302 000
280 000
340 000
366 000
410 000
562 000
670 000
780 000
1 370 000
228 000
282 000
286 000
288 000
356 000
1 020 000
1 420 000
475 000
375 000
470 000
700 000
540 000
760 000
780 000
910 000
1 350 000
1 650 000
1 700 000
3 000 000
440 000
580 000
600 000
605 000
830 000
2 440 000
3 350 000
235
241
259
257
272
275
318
329
434
462
473
581
240
274
323
360
364
542
638
267
294
309
299
333
327
382
388
504
540
570
710
290
328
379
423
423
642
770
0.33
0.41
0.35
0.40
0.40
0.40
0.40
0.39
0.33
0.33
0.33
0.33
0.33
0.39
0.43
0.47
0.43
0.42
0.33
2.03
1.64
1.95
1.68
1.68
1.68
1.68
1.72
2.03
2.03
2.03
2.03
2.07
1.74
1.56
1.43
1.57
1.60
2.03
Axial load factorConstantAbutment andfillet dimensions
eda Da Y1
3.02
2.44
2.90
2.50
2.50
2.50
2.50
2.56
3.02
3.02
3.02
3.02
3.09
2.59
2.32
2.12
2.34
2.38
3.02
Y2
1.98
1.6
1.91
1.64
1.64
1.64
1.64
1.68
1.98
1.98
1.98
1.98
2.03
1.70
1.52
1.40
1.53
1.56
1.98
Y0
1 Y1 0.67 Y2
Fa
Fr
X Y X Y
≦eFa
Fr>e
Equivalent radial loaddynamicPr=XFr+YFa
staticPor=Fr+YoFa For values of e, Y1, Y2 and Yo
see the table below.
Dimension Table (For information about bearing models not listed in the Dimension Table, contact NTN Engineering.)
Metric series Tolerances [JIS 0 Class] Inch series Tolerances [ABMA 0 Class]
Standard Prelubricating Grease
Fit (recommended)
Materials
Bearing Number
Chamfer Dimension
Operating Temperature Range
● Brand: Kyodo Yushi Palmax RBG (L373) ● Fill amount: Space volume ratio 35%
● Metric series: Shaft d6/ Housing G7 ● Inch series: Contact NTN Engineering for technical assistance.
Limiting Speed
●dm・N≦30×104
dm:bearing center diameter (mm)=(d+D) /2 d:bearing bore diameter (mm) D:bearing outside diameter (mm) N:running speed (min-1)
● Inner and outer rings: Case hardening steel ● Rolling element: Bearing steel ※ mark only: Case hardening steel
The values above are shown as a guide, and may not bemet under certain operating conditions.For details, contact NTN Engineering.
Features
● -20 to +120˚C(A-) CROU- 6001 LLA1X PX1
Accuracy codeSeal code
Bearing bore number + added numberBearing type (ULTAGE Series four row tapered roller bearing)
Optional (special heat treatment 1) )
NOTE 1) Carbonitriding
76.2266.7304.8609.6
266.7304.8609.6914.4
0000
+25+25+51+76
(1) Inner rings
Δds
over incl. high low
(3) Radial deflection of inner and outer rings
266.7304.8609.6
304.8609.6914.4
+25+51+76
000
(2) Outer rings
over incl. high low
266.7304.8609.6
304.8609.6914.4
515176
Kia, Kea
Radial runout
over incl.
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
303540455075
100
50607080
100120140
23263034385675
(2) Outer rings
mmD
over incl. high low max max max
max
(4) Combination width deviation of 4-row bearings
101.6304.8304.8609.6
304.8609.6609.6―
over incl.
―508.0
508.0―
+1 520+1 520+1 520+1 520
-1 520-1 520-1 520-1 520
over incl. high low
1. High load capacity design —the world’s highest level Maximum size and number of rollers help realize high load capacity and longer life.
2. High load resisting design —the world’s highest level Assurance of uniform contact pressure on rolling elements within bearings and against outside loads has helped greatly enhance load resistance performance.
3. Compact high sealing design “High sealing” fluoro-rubber seals, boasting a minimized seal volume, are adopted as standard. Through optimization of the tightening force of the main lip and the provision of a shielding arrangement against foreign substances, the water intrusion volume has been reduced by more than 50%: at the same time, the sub lip helps prevent the outflow of grease.
4. Long-life grease as standard The bearing is prefilled with long-life grease. A rinsing and/or grease prefilling procedure is not necessary when the bearing is installed on the side of the machine.
40%increase
Loadcapacity
®
1rs min
1
2 Standardaxial clearance
2
[CROU..LL Type]
Patent pending
Patent pending
1.9 350 ― 1
Unit : mm
rs min
or r1s min over incl.
rs max or r1s max
2.83.5
3.54
120250
250― 1.5
44.5
5.56
120250
250―
2.5
4.555.5
6.577.5
120250400
250400―
3
kN kgfC0r C0rCr Cr
mm
φD φd φda φDa
B
r1
r
C
●Design that maximizes load capacity —rollers (size and number) as wells as the cage. ●Newly developed crowning
helps improve load resistance performance.
Conventional design
Conventional design
ULTAGE design
ULTAGE design
Critical contact pressure
Axial position on roller
O-ring O-ring
Main lip Sub lip
Main lip(w/ shielding mechanism)
Fluoro-rubber seal
Shieldingmechanism
New crowning designis adopted for rollingelements.
Conventional crowning
Unit : μm
Unit : μmUnit : μm
Unit : μm
Unit : μm
Unit : μmSealed Four Row Tapered Roller Bearingsfor Rolling Mill Roll-NecksThe ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
The ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
• Compact seal design helpsmaximize bearing side volume.• Maximization in the size andnumber of rollers helps realize
high load capacity.
• Newly developed crowninghelps reduce and ensureuniform contact pressure.• World’s highest level in
load resistanceperformance.
• Newly developed seal lipdesign significantly reduces
water intrusion volume.• Fluoro-rubber seal boasts
more positive sealingperformance.
Twice asgreat
Loadresistance
Sealingperformance50%
reduction in waterintrusion volume
Compact sealcase design
Seals with improvedwater intrusionperformance
Phosphatecoatingon the entiresurface
High loadcapacity design
High loadresistance design
"ULTAGE " (a name created from the combination of "ultimate," signifying refinement,and "stage," signifying NTN's intentionthat this series of products be employed in diverse applications) is the general name for NTN's new generation of bearings thatare noted for their industry-leading performance.
®
®
Newly developed crowning
Contact pressurereduced by halfC
onta
ct p
ress
ure
Excessively highcontact pressure
Side face of innerring or centerwasher, or side faceof outer ring
Bore diameter face of bearing or outer diameter face ofbearing (Axial direction)
rs min or r1s min (Rad
ial d
irect
ion)
rs max or r1s max
rs
min
or r
1s m
in
rs
max
or r
1s m
ax
rs min or r1s min
Nominalbore diameter
d
Radialdirection
Axialdirection
Ser
ies
Met
ric
seri
esIn
ch s
erie
s
Basic load ratingsdynamic static dynamic static
1 Minimum allowable value of chamfer dimension r. 2 Depending on operating conditions, appropriate values may vary. Contact NTN Engineering for technical assistance.
ULTAGE Sealed Four Row Tapered Roller Bearings for Rolling Mill Roll-Necks [CROU..LL Type]
Nominal borediameter
mmd
Nominal borediameter
mmd
Nominal borediameter
Single borediameter deviation
ΔDs
Single outsidediameter deviation
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
Inner ringradial runout
Inner ringradial runout
Combination width deviation of
4-row bearings
ΔB2s, ΔC2s
Combination width deviation of
4-row bearings
Dimensional toleranceof mean bore
diamteter within plane
Dimensional toleranceof mean outside
diamteter within plane
Borediametervariation
Outsidediametervariation
Mean borediametervariation
Mean outsidediametervariation
ΔDmp VDp VDmp Kea
CROU-4401LLA1X
CROU-4501LLA1X
CROU-4801LLA1X
CROU-4802LLA1X
CROU-5001LLA1X
CROU-5201LLA1X
CROU-6001LLA1X
CROU-6201LLA1X
CROU-8201LLA1X
CROU-8801LLA1X
CROU-8802LLA1X
CROU-10601LLA1X※
CROU-4402LLA1X
CROU-5101LLA1X
CROU-6101LLA1X
CROU-6901LLA1X
CROU-6902LLA1X
CROU-10001LLA1X※
CROU-11901LLA1X
220
225
240
240
250
260
300
310
410
440
440
530
220.662
254.000
304.902
343.052
343.052
501.650
595.312
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
+750+900
+1 000+1 200+1 200+1 500+1 500
-750-900
-1 000-1 200-1 200-1 500-1 500
303540455075
100
5060708090
105120
23263034385675
295
320
338
338
365
365
420
430
546
590
620
780
314.325
358.775
412.648
457.098
457.098
711.200
844.550
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
315
230
248
340
270
340
310
350
400
480
454
570
239.712
269.875
266.700
254.000
299.000
520.700
615.950
0.093~0.106
0.099~0.115
0.104~0.118
0.107~0.123
0.113~0.129
0.115~0.131
0.131~0.147
0.136~0.154
0.173~0.188
0.188~0.204
0.195~0.211
0.244~0.259
0.098~0.111
0.111~0.127
0.130~0.150
0.136~0.158
0.143~0.163
0.206~0.226
0.266~0.282
0.420~0.480
0.360~0.420
0.450~0.510
0.400~0.460
0.420~0.480
0.430~0.490
0.490~0.550
0.520~0.590
0.780~0.850
0.850~0.920
0.880~0.950
1.100~1.170
0.450~0.510
0.430~0.490
0.450~0.520
0.430~0.500
0.500~0.570
0.730~0.800
1.200~1.270
1
1
1
1
1
1
1
1
1.5
1.5
3
3
1
1
1
1
1
3
3
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Bearingnumbers
Boundary dimensions Standardradial clearance
(approx.)mm
mm mm
(1) Inner rings
mm Δdmp Vdp Vdmp
d
over incl. high lowΔB2s, ΔC2s
high lowmax maxKiamax
d D B C r1s min
1 880
1 870
2 320
2 960
2 760
3 340
3 600
4 020
5 520
6 600
7 600
13 400
2 240
2 760
2 800
2 820
3 500
10 000
13 900
4 650
3 700
4 600
6 850
5 300
7 450
7 650
8 900
13 300
16 200
16 700
29 400
4 350
5 700
5 850
5 950
8 150
23 900
33 000
192 000
190 000
236 000
302 000
280 000
340 000
366 000
410 000
562 000
670 000
780 000
1 370 000
228 000
282 000
286 000
288 000
356 000
1 020 000
1 420 000
475 000
375 000
470 000
700 000
540 000
760 000
780 000
910 000
1 350 000
1 650 000
1 700 000
3 000 000
440 000
580 000
600 000
605 000
830 000
2 440 000
3 350 000
235
241
259
257
272
275
318
329
434
462
473
581
240
274
323
360
364
542
638
267
294
309
299
333
327
382
388
504
540
570
710
290
328
379
423
423
642
770
0.33
0.41
0.35
0.40
0.40
0.40
0.40
0.39
0.33
0.33
0.33
0.33
0.33
0.39
0.43
0.47
0.43
0.42
0.33
2.03
1.64
1.95
1.68
1.68
1.68
1.68
1.72
2.03
2.03
2.03
2.03
2.07
1.74
1.56
1.43
1.57
1.60
2.03
Axial load factorConstantAbutment andfillet dimensions
eda Da Y1
3.02
2.44
2.90
2.50
2.50
2.50
2.50
2.56
3.02
3.02
3.02
3.02
3.09
2.59
2.32
2.12
2.34
2.38
3.02
Y2
1.98
1.6
1.91
1.64
1.64
1.64
1.64
1.68
1.98
1.98
1.98
1.98
2.03
1.70
1.52
1.40
1.53
1.56
1.98
Y0
1 Y1 0.67 Y2
Fa
Fr
X Y X Y
≦eFa
Fr>e
Equivalent radial loaddynamicPr=XFr+YFa
staticPor=Fr+YoFa For values of e, Y1, Y2 and Yo
see the table below.
Dimension Table (For information about bearing models not listed in the Dimension Table, contact NTN Engineering.)
Metric series Tolerances [JIS 0 Class] Inch series Tolerances [ABMA 0 Class]
Standard Prelubricating Grease
Fit (recommended)
Materials
Bearing Number
Chamfer Dimension
Operating Temperature Range
● Brand: Kyodo Yushi Palmax RBG (L373) ● Fill amount: Space volume ratio 35%
● Metric series: Shaft d6/ Housing G7 ● Inch series: Contact NTN Engineering for technical assistance.
Limiting Speed
●dm・N≦30×104
dm:bearing center diameter (mm)=(d+D) /2 d:bearing bore diameter (mm) D:bearing outside diameter (mm) N:running speed (min-1)
● Inner and outer rings: Case hardening steel ● Rolling element: Bearing steel ※ mark only: Case hardening steel
The values above are shown as a guide, and may not bemet under certain operating conditions.For details, contact NTN Engineering.
Features
● -20 to +120˚C(A-) CROU- 6001 LLA1X PX1
Accuracy codeSeal code
Bearing bore number + added numberBearing type (ULTAGE Series four row tapered roller bearing)
Optional (special heat treatment 1) )
NOTE 1) Carbonitriding
76.2266.7304.8609.6
266.7304.8609.6914.4
0000
+25+25+51+76
(1) Inner rings
Δds
over incl. high low
(3) Radial deflection of inner and outer rings
266.7304.8609.6
304.8609.6914.4
+25+51+76
000
(2) Outer rings
over incl. high low
266.7304.8609.6
304.8609.6914.4
515176
Kia, Kea
Radial runout
over incl.
180250315400500630800
250315400500630800
1 000
0000000
-30-35-40-45-50-75
-100
303540455075
100
50607080
100120140
23263034385675
(2) Outer rings
mmD
over incl. high low max max max
max
(4) Combination width deviation of 4-row bearings
101.6304.8304.8609.6
304.8609.6609.6―
over incl.
―508.0
508.0―
+1 520+1 520+1 520+1 520
-1 520-1 520-1 520-1 520
over incl. high low
1. High load capacity design —the world’s highest level Maximum size and number of rollers help realize high load capacity and longer life.
2. High load resisting design —the world’s highest level Assurance of uniform contact pressure on rolling elements within bearings and against outside loads has helped greatly enhance load resistance performance.
3. Compact high sealing design “High sealing” fluoro-rubber seals, boasting a minimized seal volume, are adopted as standard. Through optimization of the tightening force of the main lip and the provision of a shielding arrangement against foreign substances, the water intrusion volume has been reduced by more than 50%: at the same time, the sub lip helps prevent the outflow of grease.
4. Long-life grease as standard The bearing is prefilled with long-life grease. A rinsing and/or grease prefilling procedure is not necessary when the bearing is installed on the side of the machine.
40%increase
Loadcapacity
®
1rs min
1
2 Standardaxial clearance
2
[CROU..LL Type]
Patent pending
Patent pending
1.9 350 ― 1
Unit : mm
rs min
or r1s min over incl.
rs max or r1s max
2.83.5
3.54
120250
250― 1.5
44.5
5.56
120250
250―
2.5
4.555.5
6.577.5
120250400
250400―
3
kN kgfC0r C0rCr Cr
mm
φD φd φda φDa
B
r1
r
C
●Design that maximizes load capacity —rollers (size and number) as wells as the cage. ●Newly developed crowning
helps improve load resistance performance.
Conventional design
Conventional design
ULTAGE design
ULTAGE design
Critical contact pressure
Axial position on roller
O-ring O-ring
Main lip Sub lip
Main lip(w/ shielding mechanism)
Fluoro-rubber seal
Shieldingmechanism
New crowning designis adopted for rollingelements.
Conventional crowning
Unit : μm
Unit : μmUnit : μm
Unit : μm
Unit : μm
Unit : μmSealed Four Row Tapered Roller Bearingsfor Rolling Mill Roll-NecksThe ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
The ULTAGE series sealed four row tapered roller bearings (CROU..LL type) are new standard series productsespecially developed to satisfy the “high load capacity”, “high load resistance performance” and “high sealingperformance” required for steel mill roll-neck applications and to improve reliability through long life design.
• Compact seal design helpsmaximize bearing side volume.• Maximization in the size andnumber of rollers helps realize
high load capacity.
• Newly developed crowninghelps reduce and ensureuniform contact pressure.• World’s highest level in
load resistanceperformance.
• Newly developed seal lipdesign significantly reduces
water intrusion volume.• Fluoro-rubber seal boasts
more positive sealingperformance.
Twice asgreat
Loadresistance
Sealingperformance50%
reduction in waterintrusion volume
Compact sealcase design
Seals with improvedwater intrusionperformance
Phosphatecoatingon the entiresurface
High loadcapacity design
High loadresistance design
"ULTAGE " (a name created from the combination of "ultimate," signifying refinement,and "stage," signifying NTN's intentionthat this series of products be employed in diverse applications) is the general name for NTN's new generation of bearings thatare noted for their industry-leading performance.
®
®
Newly developed crowning
Contact pressurereduced by halfC
onta
ct p
ress
ure
Excessively highcontact pressure
Side face of innerring or centerwasher, or side faceof outer ring
Bore diameter face of bearing or outer diameter face ofbearing (Axial direction)
rs min or r1s min (Rad
ial d
irect
ion)
rs max or r1s max
rs
min
or r
1s m
in
rs
max
or r
1s m
ax
rs min or r1s min
Nominalbore diameter
d
Radialdirection
Axialdirection
Ser
ies
Met
ric
seri
esIn
ch s
erie
s
Basic load ratingsdynamic static dynamic static
1 Minimum allowable value of chamfer dimension r. 2 Depending on operating conditions, appropriate values may vary. Contact NTN Engineering for technical assistance.
ULTAGE Sealed Four Row Tapered Roller Bearings for Rolling Mill Roll-Necks [CROU..LL Type]
Nominal borediameter
mmd
Nominal borediameter
mmd
Nominal borediameter
Single borediameter deviation
ΔDs
Single outsidediameter deviation
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
mmD
Nominal outsidediameter
Inner ringradial runout
Inner ringradial runout
Combination width deviation of
4-row bearings
ΔB2s, ΔC2s
Combination width deviation of
4-row bearings
Dimensional toleranceof mean bore
diamteter within plane
Dimensional toleranceof mean outside
diamteter within plane
Borediametervariation
Outsidediametervariation
Mean borediametervariation
Mean outsidediametervariation
ΔDmp VDp VDmp Kea
Performance Test Data
ULTAGE Sealed Four Row Tapered Roller Bearings for Rolling Mill Roll-Necks [CROU..LL Type]
●Water Resistance Durability Test
[Test conditions] Bearing number: ULTAGE sealed four row tapered roller bearing CROU-6001LLAX1 (Dimensions:φ300×φ420×310, Cr: 3600 kN, C0r: 7650 kN) Prelubricating grease: Palmax RBG Radial load: 390 kN (0.11 Cr) Running speed: Cyclic operation where one cycle consists of ⇒300 min-1 (0.5 h) ⇒ 500 min-1 (1 h) ⇒ standstill (1 h) Water spray: 0.15 L/min Total running hours: 1000 h
●Life test result
[Test conditions] Bearing number: Comparison of conventional design and ULTAGE in terms of life 30316U (dimensions:φ80×φ170×42.5) Lubrication: Turbine Oil VG68, circulating lubrication Combined radial and axial loads: 117 kN/bearing (0.4 Cr equivalent, radial load: 75 kN/bearing, axial load: 50 kN/bearing) Running speed: 2000 min-1
Misalignment: 1/600 (0.1˚)
Structure of test rig
Appearance of test rig
Rollers on side A Outer ring on side B Outer ring on side C Outer ring on side DRollers on side D
0.03% 0.02% 0.02% 0.03% 0.02%
0.27% 0.03% 2.01% 0.03% 0.04%
Appearance ofassembled inner ring
Appearance ofouter ring
Flaking
Flaking
No damage
No damage
Status
Structure of test rig
ULTAGE bearings boast a life 2.6 times as long as their design life, and twice as long as the life of conventionalbearings, when both bearing types are tested under test conditions of 0.4 Cr and 1/600 misalignment.
A B C D
Load
Test bearing
Test bearing 2Test bearing 1
Waterspray
Fr
Fa
Flaking occurred nearthe chamfered end ofrollers as well as at thecorresponding contactpoint on the outer ring.(L10 = 225 h)
After termination of thetest at 690 hours, thetest bearing was freefrom any failuresincluding flaking.
[Test result]
Conventional designL10 life 225 h(n = 6)
CalculatedL10 life173 h
ULTAGE designMinimum L10 life 450 h(n = 6)
99
80
50
20
10
5
1101 102 103 104
Cum
ulat
ive
frac
ture
pro
babi
lity
(%)
Life (h)
[Status of bearing interior after test, and water content in grease (wt%)]* Water content in factory-fresh grease is in the range of 0.001% to 0.04%.
Con
vent
iona
lse
alH
igh
sea
ling
seal
Evidence of water intrusion is found on the conventional seal. In contrast, the NTN “high sealing”seal does not exhibit evidence of water intrusion.
Con
vent
iona
lde
sign
ULT
AG
E
HEADQUARTERSNTN Corporation URL http://www.ntn.co.jp1-3-17, Kyomachibori, Nishi-ku, Osaka-shi, Osaka 550-0003 Japan
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SALES NETWORKNTN Bearing Corp. of AmericaHead Office / 1600 E. Bishop Court, P.O. Box 7604, Mount Prospect, IL 60056-7604, U.S.A. Phone: +1-847-298-7500 Fax: +1-847-699-9744Central Sales Office / 2413 North Main Street, East Peoria, Illinois 61611 Phone: +1-309-699-8600 Fax: +1-309-699-8670NTN Automotive Center / 39255 W. 12 Mile Road, Farmington Hills, MI 48331-2975, U.S.A. Phone: +1-248-324-4700 Fax: +1-248-324-1103
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NTN Bearing-Singapore (Pte) Ltd. URL http://www.ntn.com.sgHead Office / No.9 Clementi Loop Singapore 129812 Phone: + 65-64698066 Fax: +65-64695400Philippine Representative Office / Unit 1002 Philippine Axa Life Centre Condominium Corporation Sen. Gil Puyat Ave Corner Tindalo Street Makati City, Philippines Phone: +63-2-759-4407 Fax: +63-2-759-4409India Representative Office / 805, International Trade Tower, Nehru Place, New Delhi 110019, India Phone: +91-11-51513234 Fax: +91-11-51513236Indonesia Representative Office / Summitmas 1., 18th Floor, Jl. Jend. Sudirman Kav. 61-62, Jakarta 12190, Indonesia Phone: +62-21-252-2081 Fax: +62-21-252-2082Vietnam Representative Office / 303, 3rd of Thanh Dong Building 132 - 138 Kim Ma Str., Ba Dinh Dist., Ha Noi, Viet Nam Phone: +84-4-37347661 Fax: +84-4-37347662
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NTN Bearing-Thailand Co., Ltd.Head Office / 12th Floor, Panjathani Tower, 127/15 Nonsee Road, Chongnonsee Yannawa, Bangkok 10120, Thailand Phone: +66-2-681-0401 Fax: +66-2-681-0408Khon Kaen Branch / 189-191 Ruen Rom Road Tambon Nai-Muang, Amphur Muang, Kohn Kaen, 40000, Thailand Phone: +66-43-223679 Fax: +66-43-223061Haad Yai Branch / 198-198/1 Nipat U-Thid 2 Road, Amphur Haad Yai, Songkhla, 90110, Thailand Phone: +66-74-236568 Fax: +66-74-231520Bangna Branch / 35/35 Bangna-Trad Road, KM11 Bangplee, Samutprakarn, 10540, Thailand Phone: +66-2-7501732 Fax: +66-2-7501731Chiangmai Branch / 46/8-10 Thy wang Rd. Changmoi sub.district, Munag district, Chiangmai province, 50300 Thailand Phone: +66-53-874328 Fax: +66-53-874330
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PT. NTN Bearing IndonesiaC-21, 22 MM2100 Industrial Town, Cikarang Barat, BEKASI 17520 West Jave Indonesia Phone : +62-21-252-2081 Fax : +62-21-252-2082
NTN-CBC (Australia) Pty. Ltd.3, The Crescent, Kingsgrove, NSW 2008, Australia Phone: +61-2-99479200 Fax: +61-2-95543311
NTN de Mexico, S.A. URL http://www.ntnmexico.com.mxMexico Head Office / Emilio Cárdenas No.158 Apdo.124, C.P.54030, Tlalnepantla, Edo.deMéxico, Mexico Phone: +52-55-5390-1133 Fax: +52-55-5565-8545Guadalajara Branch / Calle 22 No.2465, Zona Industrial, C.P.44940, Guadalajara, Jalisco, Mexico Phone: +52-33-3145-1448 Fax: +52-33-3145-1594Monterrey Branch / Av. Ruiz Cortines No.1336 Ote, Col. La Purisima, C.P.67120, Cd. Guadalupe, Nuevo Leon, Mexico Phone: +52-818-334-9931 Fax: +52-818-334-9932Mexicali Branch / Blvd. Benito Juárez No.3293 Esq. Ayuntamiento, C.P.21360, Mexicali, BCN, Mexico Phone: +52-686-563-3632 Fax: +52-686-582-2057Veracruz Branch / María Auxiliadora No.687 Esq. J.F.Molina, C.P.91870, Col. Los Pinos, Veracruz, Mexico Phone: 52-229-934-4757 Fax: +52-229-938-0457
NTN Sudamericana, S.A.URL http://www.ntnsudamericana.comWorld Trade Center Panama Calle 53 Este, Urbanización Marbella Piso NO.16, Oficina 1601 Apartado Postal 832-0487, Panamá, Rep.de Panamá Phone: +507-269-4777 Fax: +507-264-5592
NTN do Brasil Ltda. URL http://www.ntn.com.brAv. Moema, 94-9˚ Andar-conj, 92a94 CEP 04077-020-Indianópolis-São Paulo-SP, -Brasil Phone: +55-11-5051-0600 Fax: +55-11-5051-2807
NTN Korea Co., Ltd.Head Office / 10th Floor, Press Center, 25, Taepyeong-Ro 1-GA, Jung-Gu, Seoul 100-745, Korea Phone: +82-2-720-3665 Fax: +82-2-720-3669Busan Branch / Rm.707, 7th Floor, Daerim Bldg., 341-5 Bujeon 1-Dong, Busanjin- Gu, Busan, Korea, 614-843 Phone: +82-51-811-1351 Fax: +82-51-811-1353
NOTE : The appearance and specifications may be changed without prior notice if required to improve performance. Although care has been taken to assure the accuracy of the data compiled in this catalog, NTN does not assume any liability to any company or person for errors or omissions.
AE72 CAT. No. 3801/E 12. 03. 06. NPrinted in Japan
Sealed Four Row Tapered Roller Bearingsfor Rolling Mill Roll-Necks
[CROU..LL Type]
CAT. No. 3801/E