Double row Cylindrical Roller Bearing
Size range:Inter diameter 200-1500mm(Customizable within the scope)
Material: GCr15/GCr15SiMn/G20Cr2Ni4A
Type: NNU and NN series cylindrical roller bearing. The NN design has an inner ring with two ribs and an outer ring without ribs.
Double-row cylindrical roller bearings are designed to provide exceptionally high radial load capacity, enhanced rigidity, and stable performance for heavy-duty applications. Featuring two rows of precision-machined cylindrical rollers, this bearing type offers improved load distribution and greater stiffness compared to single-row designs, making it ideal for machinery that demands higher strength and reliability.
Double row cylindrical roller bearings are designed to provide exceptionally high radial load capacity, enhanced rigidity, and stable performance for heavy-duty applications. Featuring two rows of precision-machined cylindrical rollers, this bearing type offers improved load distribution and greater stiffness compared to single-row designs, making it ideal for machinery that demands higher strength and reliability.
The optimized internal geometry ensures low friction, reduced heat generation, and smooth high-speed operation. With the ability to accommodate limited axial displacement in both directions—depending on the specific design variant—double-row cylindrical roller bearings effectively manage thermal expansion and shaft movement in complex mechanical systems.
Constructed from high-quality bearing steel and available with multiple cage materials and clearance options, these bearings deliver long service life and consistent performance even under challenging working conditions. They are widely used in heavy motors, industrial gearboxes, machine tools, material-handling equipment, and rolling mill machinery where durability and precision are critical.
With robust structure, customizable dimensions, and diverse configurations such as NN and NNU series, double-row cylindrical roller bearings ensure superior radial capacity, high running accuracy, and dependable operation for modern industrial applications.
Technical Specifications
| Specification | Details |
|---|---|
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Bore Diameter | 200mm – 1500mm(Customizable within the scope) |
| Outer Diameter | 250mm – 2300mm |
| Load Capacity | High Radial Load Capacity |
| Material | High-Quality Bearing Steel / Stainless Steel |
| Precision Class | P0, P6, P5, P4 |
| Operating Temperature | -40°C to +120°C |
| Lubrication | Grease, Oil, or Customization |
| Clearance | C0, C3, C4 |

| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 200 | 280 | 60 | 2.1 | 420 | 815 | NN 3940 | 3282940 | - | 259 | 216 | 221 | 263 | - | - | 2 | 10.6 |
| 280 | 80 | 2.1 | 484 | 960 | NN 4940K/W20 | 4182940Y | - | 259 | 211 | 222 | 264 | 269 | - | 2 | 14.1 | |
| 280 | 80 | 2.1 | 570 | 1220 | NN 4940 | 4282940 | - | 259 | 211 | 222 | 264 | 269 | - | 2 | 15.3 | |
| 280 | 80 | 2.1 | 570 | 1220 | NNU 4940 | 4482940 | 225 | - | 211 | 222 | - | 269 | 228 | 2 | 15.3 | |
| 310 | 82 | 2.1 | 655 | 1170 | NN 3040 | 3282140 | - | 282 | 211 | - | 285 | 299 | - | 2 | 22.7 | |
| 310 | 82 | 2.1 | 655 | 1170 | NNU 3040 | 3482140 | 232 | - | 211 | 223 | - | 293 | 237 | 2 | 22.7 | |
| 310 | 109 | 2.1 | 890 | 1730 | NN 4040 | 4282140 | - | 282 | 216 | 225 | 293 | - | - | 2 | 30.4 | |
| 220 | 300 | 60 | 2.1 | 440 | 895 | NN 3944 | 3282944 | - | 279 | 236 | 241 | - | 283 | - | 2 | 11.4 |
| 300 | 80 | 2.1 | 600 | 1330 | NN 4944 | 4282944 | - | 279 | 236 | 242 | - | 283 | - | 2 | 16.6 | |
| 300 | 80 | 2.1 | 600 | 1330 | NNU 4944 | 4482944 | 245 | - | 231 | 242 | - | 289 | 249 | 2 | 16.6 | |
| 340 | 90 | 3 | 815 | 1480 | NN 3044 | 3282144 | - | 310 | 233 | - | 313 | 327 | - | 2.5 | 29.6 | |
| 340 | 90 | 3 | 815 | 1480 | NNU 3044 | 3482144 | 254 | - | 230 | - | 313 | 327 | - | 2.5 | 30 | |
| 340 | 118 | 3 | 1190 | 2400 | NN 4044 | 4282144 | - | 310 | 233 | - | 313 | 327 | - | 2.5 | 39.8 | |
| 370 | 120 | 4 | 1050 | 1810 | NN 3144 | 3282744 | - | 331 | 241 | - | - | 346 | - | 3 | 51.9 | |
| 370 | 120 | 4 | 1050 | 1810 | NNU 3144 | 3482744 | 263 | - | 241 | - | - | 346 | 268 | 3 | 52.3 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 240 | 300 | 60 | 1.1 | 405 | 1030 | NN 4848 | 4282848 | - | 283 | 248 | 255 | 287 | 290 | - | 1 | 9.77 |
| 300 | 60 | 1.1 | 358 | 930 | NNU4848 | - | 259 | - | 248 | 255 | - | 290 | 263 | 1 | 9.9 | |
| 320 | 60 | 2.1 | 460 | 975 | NN 3948 | 3282948 | - | 300 | 251 | 262 | - | 309 | - | 2 | 12.2 | |
| 320 | 80 | 2.1 | 625 | 1450 | NN 4948 | 4282948 | - | 300 | 251 | 262 | - | 309 | - | 2 | 17.9 | |
| 320 | 80 | 2.1 | 625 | 1450 | NNU 4948 | 4482948 | 263 | - | 251 | 262 | - | 309 | 269 | 2 | 18 | |
| 360 | 92 | 3 | 855 | 1600 | NN 3048 | 3282148 | - | 330 | 253 | - | 333 | 347 | - | 2.5 | 32.7 | |
| 360 | 92 | 3 | 855 | 1600 | NNU 3048 | 3482148 | 274 | - | 253 | 266 | - | 347 | 280 | 2.5 | 32.7 | |
| 360 | 118 | 3 | 1240 | 2600 | NN 4048 | 4282148 | - | 330 | 253 | 266 | 333 | 347 | - | 2.5 | 39.3 | |
| 360 | 118 | 3 | 1240 | 2600 | NNU 4048 | 4482148 | 274 | - | 253 | 266 | - | 347 | 281 | 2.5 | 42.7 | |
| 400 | 128 | 4 | 1170 | 2040 | NN 3148 | 3282748 | - | 358 | 256 | - | 362 | 384 | - | 3 | 64.2 | |
| 400 | 160 | 4 | 1880 | 3530 | NNU 4148 | 4482748 | 282 | - | 256 | 282 | - | 384 | 291 | 3 | 85 | |
| 260 | 360 | 75 | 2.1 | 670 | 1380 | NN 3952 | 3282952 | - | 335 | 271 | 288 | - | 349 | - | 2 | 21.4 |
| 360 | 100 | 2.1 | 711 | 1540 | NN 4952K | 4182952 | - | 335 | 271 | 288 | - | 349 | - | 2 | 29.2 | |
| 360 | 100 | 2.1 | 935 | 2100 | NN 4952 | 4282952 | - | 335 | 271 | 288 | - | 349 | - | 2 | 28.3 | |
| 360 | 100 | 2.1 | 935 | 2100 | NNU 4952 | 4482952 | 292 | - | 271 | 288 | - | 349 | 296 | 2 | 31.1 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 260 | 400 | 104 | 4 | 969 | 1810 | NN 3052K | 3182152 | - | 364 | 276 | - | 367 | 384 | - | 3 | 47.1 |
| 400 | 104 | 4 | 969 | 1810 | NN 3052 | 3282152 | - | 364 | 276 | - | 367 | 384 | - | 3 | 48.5 | |
| 400 | 140 | 4 | 1550 | 3250 | NN 4052 | 4282152 | - | 364 | 276 | - | 369 | 384 | - | 3 | 59.7 | |
| 400 | 140 | 4 | 1550 | 3250 | NNU 4052 | 4482152 | 300 | - | 276 | 289 | - | 384 | 299 | 3 | 65 | |
| 440 | 144 | 4 | 1480 | 2660 | NN 3152 | 3282752 | - | 393 | 276 | - | 415 | 424 | - | 3 | 89.1 | |
| 440 | 180 | 4 | 2200 | 4000 | NNU4152 | 4482752 | 306 | - | 276 | 300 | - | 424 | 310 | 3 | 113 | |
| 280 | 350 | 69 | 1.1 | 445 | 1160 | NN 4856 | 4282856 | - | 329 | 287.5 | - | - | 340 | - | 1 | 15.3 |
| 350 | 69 | 2 | 457 | 1200 | NNU4856K | - | 303 | - | 287.5 | 298 | - | 340 | 307 | 1 | 15.5 | |
| 380 | 75 | 2.1 | 695 | 1460 | NN 3956 | 3282956 | - | 355 | 291 | - | - | 369 | - | 2 | 22.7 | |
| 380 | 100 | 2.1 | 960 | 2230 | NN 4956 | 4284956 | - | 355 | 291 | - | - | 369 | - | 2 | 32.9 | |
| 380 | 100 | 2.1 | 960 | 2230 | NNU 4956 | 4482956 | 312 | - | 291 | 308 | - | 369 | 316 | 2 | 33 | |
| 420 | 106 | 4 | 1020 | 1950 | NN 3056K | 3182156 | - | 384 | 296 | - | 387 | 404 | - | 3 | 49.1 | |
| 420 | 106 | 4 | 1020 | 1950 | NN 3056 | 3282156 | - | 384 | 296 | - | 387 | 404 | - | 3 | 49.9 | |
| 420 | 106 | 4 | 1080 | 2080 | NNU3056 | - | 320 | - | 300 | - | - | 440 | 326 | 3 | 51.4 | |
| 460 | 146 | 5 | 1520 | 2790 | NN 3156 | 3282756 | - | 413 | 300 | - | 416 | 440 | - | 4 | 95.7 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 300 | 380 | 80 | 2.1 | 690 | 1760 | NNU 4860 | 4482860 | 324 | - | 308 | 320 | - | 369 | 330 | 2 | 21.7 |
| 420 | 118 | 3 | 1230 | 2870 | NN 4960 | 4282960 | - | 388 | 314 | 335 | - | 398 | - | 2.5 | 51.6 | |
| 420 | 118 | 3 | 1230 | 2870 | NNU 4960 | 4482960 | 339 | - | 314 | 335 | - | 406 | 343 | 2.5 | 51.9 | |
| 460 | 118 | 4 | 1180 | 2250 | NN 3060 | 3282160 | - | 418 | 316 | - | 421 | 444 | - | 3 | 71.7 | |
| 460 | 118 | 4 | 1180 | 2250 | NN 3060K | 3182160 | - | 418 | 316 | - | 421 | 444 | - | 3 | 69.6 | |
| 460 | 160 | 4 | 1920 | 4100 | NN4060 | - | - | 418 | 316 | - | - | 440 | - | 3 | 97.6 | |
| 500 | 160 | 5 | 1760 | 3150 | NN 3160 | 3282760 | - | 448 | 320 | - | 450 | 480 | - | 4 | 125 | |
| 500 | 160 | 5 | 1760 | 3150 | NNU 3160 | 3482760 | 358 | - | 320 | - | - | 480 | 365 | 4 | 126 | |
| 320 | 400 | 80 | 2.1 | 700 | 1840 | NNU 4864 | 4482864 | 346 | - | 328 | 340 | - | 389 | 350 | 2 | 22.8 |
| 440 | 118 | 3 | 1260 | 3050 | NN 4964 | 4282964 | - | 408 | 334 | 355 | - | 427 | - | 2.5 | 50.2 | |
| 440 | 118 | 3 | 1260 | 3050 | NN 4964K | 4182964 | - | 408 | 334 | 355 | - | 427 | - | 2.5 | 52 | |
| 440 | 118 | 3 | 1260 | 3050 | NNU 4964 | 4482964 | 359 | - | 334 | 355 | - | 426 | 363 | 2.5 | 54.9 | |
| 480 | 121 | 4 | 1350 | 2670 | NN 3064 | 3282164 | - | 438 | 336 | - | 442 | 464 | - | 3 | 76.6 | |
| 480 | 121 | 4 | 1350 | 2670 | NNU 3064 | 3482164 | 366 | - | 336 | 353 | 442 | 464 | - | 3 | 76.9 | |
| 480 | 160 | 4 | 1960 | 4300 | NNU 4064 | 4482164 | 367 | - | 336 | 353 | - | 464 | 364 | 3 | 103 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 320 | 540 | 176 | 5 | 2090 | 3750 | NNU 3164 | 3482764 | 384 | - | 340 | 379 | - | 520 | 389 | 4 | 154 |
| 340 | 460 | 90 | 3 | 905 | 2020 | NN 3968 | 3282968 | - | 428 | 353 | 375 | - | 447 | - | 2.5 | 42.9 |
| 460 | 118 | 3 | 1040 | 2450 | NN 4968K | 4182968 | - | 428 | 353 | 375 | - | 447 | - | 2.5 | 53.8 | |
| 460 | 118 | 3 | 1350 | 3400 | NN 4968 | 4282968 | - | 428 | 353 | 375 | - | 447 | - | 2.5 | 52.1 | |
| 460 | 118 | 3 | 1350 | 3400 | NNU 4968 | 4482968 | 379 | - | 354 | 375 | - | 446 | 383 | 2.5 | 57.8 | |
| 520 | 133 | 5 | 1560 | 3020 | NN 3068K | 3182168 | - | 473 | 360 | - | 477 | 500 | - | 4 | 101 | |
| 520 | 133 | 5 | 1560 | 3020 | NN 3068 | 3282168 | - | 473 | 360 | - | 477 | 500 | - | 4 | 104 | |
| 520 | 133 | 5 | 1560 | 3020 | NNU3068 | 3482168 | 387 | - | 360 | - | - | 500 | 400 | 4 | 104 | |
| 520 | 180 | 5 | 2420 | 5350 | NNU 4068 | 4482168 | 385 | - | 360 | 377 | - | 500 | 389 | 4 | 141 | |
| 360 | 480 | 90 | 3 | 930 | 2130 | NN 3972 | 3282972 | - | 448 | 373 | - | 453 | 467 | - | 2.5 | 44.9 |
| 480 | 118 | 3 | 1390 | 3550 | NNU 4972 | 4482972 | 399 | - | 374 | 395 | - | 466 | 403 | 2.5 | 60.6 | |
| 540 | 134 | 5 | 1630 | 3240 | NN 3072 | 3282172 | - | 493 | 380 | - | 497 | 520 | - | 4 | 106 | |
| 540 | 134 | 5 | 1630 | 3240 | NN 3072K | 3182172 | - | 493 | 380 | - | 497 | 520 | - | 4 | 106 | |
| 540 | 134 | 5 | 1630 | 3240 | NNU 3072 | 3482172 | 413 | - | 380 | - | - | 520 | 420 | 4 | 108 | |
| 540 | 180 | 5 | 2530 | 5450 | NN 4072 | 3282172 | - | 496 | 380 | 397 | - | 520 | - | 4 | 132 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 420 | 620 | 150 | 5 | 2130 | 4450 | NN 3084 | 3282184 | - | 568 | 440 | - | 574 | 600 | - | 4 | 154 |
| 620 | 150 | 5 | 2130 | 4450 | NNU 3084 | 3482184 | 478 | - | 440 | - | - | 600 | 474 | 4 | 155 | |
| 620 | 200 | 5 | 3150 | 7100 | NN 4084 | 4282184 | - | 571 | 440 | - | 574 | 600 | - | 4 | 189 | |
| 620 | 200 | 5 | 3400 | 7850 | NNU 4084 | 4482184 | 469 | - | 440 | 460 | - | 600 | 474 | 4 | 209 | |
| 700 | 224 | 6 | 3550 | 6800 | NNU 3184 | 3482784 | 501 | - | 444 | - | - | 660 | 508 | 5 | 347 | |
| 440 | 540 | 100 | 2.1 | 950 | 2790 | NNU 4888 | 4482888 | 470 | - | 448 | 464 | - | 529 | 476 | 2 | 49.5 |
| 650 | 157 | 6 | 2360 | 4900 | NN 3088 | 3282188 | - | 596 | 466 | - | 600 | 624 | - | 5 | 177 | |
| 650 | 157 | 6 | 2360 | 4900 | NNU 3088 | 3482188 | 500 | - | 466 | - | - | 624 | 507 | 5 | 178 | |
| 720 | 226 | 6 | 3500 | 6800 | NN 3188 | 3282788 | - | 649 | 466 | - | - | 680 | - | 5 | 357 | |
| 460 | 580 | 118 | 3 | 1200 | 3600 | NNU4892 | 4482892 | 497 | - | 474 | 489 | - | 566 | 502 | 2.5 | 76 |
| 620 | 118 | 4 | 1610 | 3700 | NN 3992 | 3282992 | - | 578 | 476 | 504 | - | 604 | - | 3 | 94.5 | |
| 620 | 160 | 4 | 2400 | 6200 | NNU 4992 | 4482992 | 510 | - | 476 | 504 | - | 604 | 515 | 3 | 140 | |
| 680 | 163 | 6 | 2470 | 5070 | NN 3092K | 3182192 | - | 624 | 484 | - | 627 | 654 | - | 5 | 204 | |
| 680 | 163 | 6 | 2470 | 5070 | NN 3092 | 3282192 | - | 624 | 484 | - | 627 | 654 | - | 5 | 204 | |
| 480 | 650 | 170 | 5 | 2690 | 7000 | NN 4996 | 4282996 | - | 607 | 500 | - | - | 630 | - | 4 | 164 |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 480 | 700 | 165 | 6 | 2600 | 5550 | NN 3096 | 3282196 | - | 643 | 506 | - | 648 | 674 | - | 5 | 211 |
| 700 | 218 | 6 | 4300 | 8600 | NNU4096 | 4482196 | 533 | - | 506 | 523 | - | 674 | 538 | 5 | 273 | |
| 790 | 248 | 7.5 | 4050 | 8100 | NN 3196 | 3282796 | - | 708 | 512 | - | 718 | 758 | - | 6 | 447 | |
| 500 | 670 | 170 | 5 | 2720 | 7200 | NNU 49/500 | 44829/500 | 554 | - | 520 | 548 | - | 650 | 559 | 4 | 171 |
| 720 | 167 | 6 | 2580 | 5600 | NN 30/500 | 32821/500 | - | 664 | 526 | - | 668 | 694 | - | 5 | 205 | |
| 720 | 167 | 6 | 2580 | 5600 | NNU 30/500 | 34821/500 | 563 | - | 526 | - | - | 694 | 570 | 5 | 220 | |
| 530 | 710 | 136 | 5 | 2040 | 4900 | NN 39/530 | 32829/530 | - | 663 | 550 | 582 | - | 690 | - | 4 | 149 |
| 710 | 180 | 5 | 2900 | 7050 | NNU 49/530 | 44829/530 | 588 | - | 550 | 582 | - | 690 | 593 | 4 | 202 | |
| 780 | 185 | 6 | 3200 | 6900 | NN 30/530 | 32821/530 | - | 715 | 556 | - | 720 | 754 | - | 5 | 296 | |
| 560 | 750 | 140 | 5 | 2370 | 4860 | NN 39/560 | 32829/530 | - | 705 | 576 | - | 711 | 735 | - | 4 | 188 |
| 750 | 190 | 5 | 3250 | 8700 | NNU 49/560 | 44829/560 | 623 | - | 580 | 619 | - | 730 | 628 | 4 | 239 | |
| 780 | 180 | 8 | 2400 | 6400 | NN 6/560 | 2872/560 | - | 725 | 580 | - | 732 | 765 | - | 5 | 266 | |
| 820 | 195 | 8 | 2460 | 6560 | NN 30/560K | 31821/560 | - | 756 | 586 | - | 761 | 794 | - | 5 | 341 | |
| 820 | 258 | 6 | 4100 | 10600 | NN 40/560 | 42821/560 | - | 745 | 586 | - | - | 794 | - | 5 | 472 | |
| 820 | 258 | 6 | 5720 | 13100 | NNU 40/560 | 44821/560 | 626 | - | 586 | 615 | - | 794 | 632 | 5 | 420 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 560 | 920 | 280 | 7.5 | 6850 | 13700 | NNU 31/560 | 34827/560 | 650 | - | 630 | - | - | - | 655 | 6 | 738 |
| 600 | 800 | 200 | 5 | 3850 | 10500 | NNU 49/600 | 44829/600 | 666 | - | 620 | 662 | - | 780 | 672 | 4 | 284 |
| 800 | 200 | 5 | 3450 | 7180 | NN 49/600K | 41829/600 | - | 755 | 620 | - | - | 780 | - | 4 | 257 | |
| 870 | 200 | 6 | 3420 | 7785 | NN 30/600 | 32821/600 | - | 803 | 626 | - | 808 | 844 | - | 5 | 355 | |
| 870 | 272 | 6 | 6138 | 14040 | NNU 40/600 | 44821/600 | 664 | - | 626 | 653 | - | 844 | 670 | 5 | 530 | |
| 980 | 375 | 7.5 | 8910 | 18990 | NNU 41/600 | 44827/600 | 699 | - | 633 | 682 | - | 947 | 706 | 6 | 1100 | |
| 630 | 780 | 150 | 4 | 2290 | 7000 | NNU 48/630 | 44828/630 | 676 | - | 646 | 667 | - | 764 | 676 | 3 | 160 |
| 850 | 218 | 6 | 4200 | 11400 | NN 49/630 | 42829/630 | - | 793 | 656 | - | - | 824 | - | 5 | 328 | |
| 850 | 218 | 6 | 4000 | 10800 | NNU 49/630 | 44829/630 | 704 | - | 656 | 699 | - | 824 | 710 | 5 | 356 | |
| 920 | 212 | 7.5 | 3860 | 8820 | NN 30/630 | 32821/630 | - | 845 | 663 | - | 851 | 887 | - | 6 | 430 | |
| 920 | 290 | 7.5 | 6885 | 15750 | NNU 40/630 | 44821/630 | 699 | - | 663 | 688 | - | 887 | 705 | 6 | 635 | |
| 1030 | 400 | 7.5 | 9900 | 21600 | NNU 41/630 | 44827/630 | 734 | - | 663 | 716 | - | 997 | 740 | 6 | 1330 | |
| 670 | 900 | 230 | 6 | 4450 | 12330 | NN 49/670 | 42829/670 | - | 838 | 696 | - | - | 874 | - | 5 | 419 |
| 900 | 230 | 6 | 4950 | 13100 | NNU 49/670 | 44829/670 | 738 | - | 696 | 732 | - | 874 | 744 | 5 | 430 | |
| 980 | 230 | 7.5 | 4620 | 10260 | NN 30/670K | 31821/670 | - | 901 | 703 | - | 907 | 947 | - | 6 | 597 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 670 | 980 | 308 | 7.5 | 7578 | 17640 | NNU 40/670 | 44821/670 | 744 | - | 703 | 733 | - | 947 | 750 | 6 | 765 |
| 1090 | 412 | 7.5 | 10890 | 22950 | NNU 41/670 | 44827/670 | 774 | - | 703 | 756 | - | 1057 | 780 | 6 | 1500 | |
| 710 | 870 | 160 | 4 | 2640 | 8350 | NNU 48/710 | 44828/710 | 759 | - | 726 | 750 | - | 854 | 759 | 3 | 203 |
| 950 | 243 | 6 | 4850 | 13770 | NNU49/710 | 44829/710 | 782 | - | 736 | 776 | - | 924 | 788 | 5 | 480 | |
| 1030 | 236 | 7.5 | 5148 | 11880 | NN 30/710 | 32821/710 | - | 951 | 743 | - | 957 | 997 | - | 6 | 590 | |
| 1030 | 315 | 7.5 | 8415 | 19440 | NNU 40/710 | 44821/710 | 784 | - | 743 | 772 | - | 997 | 790 | 6 | 850 | |
| 1150 | 438 | 9.5 | 12060 | 25650 | NNU 41/710 | 44827/710 | 820 | - | 750 | 800 | - | 1110 | 826 | 8 | 1790 | |
| 750 | 920 | 170 | 5 | 3070 | 9180 | NN 48/750 | 42828/750 | - | 879 | 770 | - | 887 | 904 | - | 4 | 240 |
| 1000 | 250 | 6 | 4950 | 14400 | NNU 49/750 | 44829/750 | 831 | - | 776 | 824 | - | 974 | 837 | 5 | 540 | |
| 1090 | 250 | 7.5 | 6336 | 14400 | NN 30/750 | 32821/750 | - | 1007 | 783 | - | 1011 | 1057 | - | 6 | 705 | |
| 1090 | 335 | 7.5 | 9180 | 21600 | NNU 40/750 | 44821/750 | 830 | - | 783 | 816 | - | 1057 | 836 | 6 | 925 | |
| 1220 | 475 | 9.5 | 14490 | 31950 | NNU 41/750 | 44827/750 | 871 | - | 790 | 850 | - | 1180 | 877 | 8 | 2230 | |
| 800 | 1060 | 258 | 6 | 5247 | 15300 | NNU 49/800 | 44829/800 | 884 | - | 826 | 876 | - | 1034 | 890 | 5 | 615 |
| 1150 | 258 | 7.5 | 7029 | 16200 | NN 30/800 | 32821/800 | - | 1065 | 833 | - | 1071 | 1117 | - | 6 | 790 | |
| 1150 | 345 | 7.5 | 9720 | 23400 | NNU 40/800 | 44821/800 | 885 | - | 833 | 871 | - | 1117 | 891 | 6 | 1140 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 800 | 1280 | 475 | 9.5 | 14850 | 32850 | NNU 41/800 | 44827/800 | 921 | - | 840 | 900 | - | 1240 | 928 | 8 | 2390 |
| 850 | 1030 | 180 | 5 | 3400 | 11400 | NNU48/850 | 44828/850 | 905 | - | 888 | - | - | - | 912 | 4 | 310 |
| 1120 | 272 | 6 | 5346 | 16200 | NNU 49/850 | 44829/850 | 939 | - | 876 | 930 | - | 1094 | 946 | 5 | 715 | |
| 1220 | 272 | 7.5 | 7128 | 16740 | NN 30/850 | 32821/850 | - | 1130 | 883 | - | 1136 | 1187 | - | 6 | 940 | |
| 1220 | 365 | 7.5 | 10530 | 25650 | NNU 40/850 | 44821/850 | 940 | - | 883 | 923 | - | 1187 | 947 | 6 | 1340 | |
| 1360 | 500 | 6 | 19080 | 40500 | NNU 41/850 | 44827/850 | 976 | - | 897 | 935 | - | 1334 | 963 | 5 | 2900 | |
| 900 | 1180 | 280 | 6 | 5940 | 18000 | NNU 49/900 | 44829/900 | 986 | - | 926 | 977 | - | 1154 | 993 | 5 | 805 |
| 1280 | 280 | 7.5 | 7425 | 18000 | NN 30/900 | 32821/900 | - | 1185 | 933 | - | 1191 | 1257 | - | 6 | 1050 | |
| 1280 | 375 | 7.5 | 11520 | 28350 | NNU 40/900 | 44821/900 | 990 | - | 933 | 963 | - | 1257 | 997 | 6 | 1500 | |
| 1420 | 515 | 6 | 19800 | 42750 | NNU 41/900 | 44827/900 | 1032 | - | 947 | 1008 | - | 1394 | 1039 | 5 | 3180 | |
| 950 | 1250 | 300 | 7.5 | 6633 | 20160 | NNU 49/950 | 44829/950 | 1046 | - | 983 | 1036 | - | 1217 | 1053 | 6 | 960 |
| 1360 | 300 | 7.5 | 8217 | 20160 | NN 30/950 | 32821/950 | - | 1255 | 983 | - | 1263 | 1327 | - | 6 | 1300 | |
| 1360 | 412 | 7.5 | 12780 | 31950 | NNU 40/950 | 44821/950 | 1050 | - | 983 | 1033 | - | 1327 | 1057 | 6 | 1900 | |
| 950 | 1500 | 545 | 6 | 22950 | 51300 | NNU 41/950 | 44827/950 | 1092 | - | 997 | 1068 | - | 1474 | 1099 | 5 | 3830 |
| 1000 | 1320 | 315 | 7.5 | 7722 | 23400 | NNU 49/1000 | 44829/1000 | 1103 | - | 1033 | 1096 | - | 1287 | 1110 | 6 | 1250 |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 1000 | 1320 | 315 | 7.5 | 8580 | 25200 | NN49/1000 | 42829/1000 | - | 1238 | 1033 | - | 1249 | 1287 | - | 6 | 1200 |
| 1420 | 308 | 7.5 | 9090 | 22050 | NN 30/1000 | 32821/1000 | - | 1316 | 1033 | - | 1324 | 1387 | - | 6 | 1400 | |
| 1420 | 412 | 7.5 | 13860 | 34200 | NNU 40/1000 | 44821/1000 | 1101 | - | 1033 | 1084 | - | 1387 | 1108 | 6 | 2000 | |
| 1580 | 580 | 6 | 24750 | 55800 | NNU 41/1000 | 44827/1000 | 1154 | - | 1047 | 1128 | - | 1474 | 1161 | 5 | 4270 | |
| 1060 | 1400 | 335 | 7.5 | 9450 | 27450 | NNU 49/1060 | 44829/1060 | 1160 | - | 1093 | 1150 | - | 1367 | 1167 | 6 | 1350 |
| 1500 | 325 | 9.5 | 9900 | 24750 | NN 30/1060 | 32821/1060 | - | 1391 | 1100 | - | 1399 | 1460 | - | 8 | 1650 | |
| 1660 | 600 | 7.5 | 27270 | 62550 | NNU 41/1060 | 44827/1060 | 1214 | - | 1116 | 1189 | - | 1627 | 1221 | 6 | 5070 | |
| 1120 | 1460 | 335 | 7.5 | 9450 | 28350 | NNU 49/1120 | 44829/1120 | 1220 | - | 1153 | 1210 | - | 1427 | 1227 | 6 | 1450 |
| 1750 | 630 | 7.5 | 30240 | 68850 | NNU 41/1120 | 44827/1120 | 1279 | - | 1176 | 1253 | - | 1717 | 1286 | 6 | 5600 | |
| 1180 | 1540 | 355 | 7.5 | 10710 | 32400 | NNU 49/1180 | 44829/1180 | 1285 | - | 1213 | 1270 | - | 1507 | 1293 | 6 | 1650 |
| 1850 | 670 | 7.5 | 33210 | 76500 | NNU 41/1180 | 44827/1180 | 1350 | - | 1227 | 1320 | - | 1817 | 1358 | 6 | 7200 | |
| 1250 | 1950 | 710 | 7.5 | 37620 | 88200 | NNU 41/1250 | 44827/1250 | 1426 | - | 1297 | 1396 | - | 1917 | 1434 | 6 | 8000 |
| 1320 | 1720 | 400 | 7.5 | 12420 | 38250 | NNU 49/1320 | 44829/1320 | 1440 | - | 1353 | 1420 | - | 1687 | 1448 | 6 | 3100 |
| 1720 | 400 | 7.5 | 13800 | 42500 | NN49/1320 | 42829/1320 | - | 1620 | 1353 | - | 1640 | 1687 | - | 6 | 3060 | |
| 2060 | 750 | 7.5 | 41130 | 95400 | NNU 41/1320 | 44827/1320 | 1507 | - | 1367 | 1474 | - | 2027 | 1515 | 6 | 9400 | |
| Boundary | Basic load ratings | Part number | Structure size | Installation dimersion | Mass | |||||||||||
| mm | kN | mm | mm | kg | ||||||||||||
| d | D | B | rmin | Cr | Cor | Current | Original | Fw | Ew | damin | damax | Damin | Damax | dbmin | ramax | |
| 1400 | 2180 | 775 | 9.5 | 44550 | 104400 | NNU 41/1400 | 44827/1400 | 1598 | - | 1470 | 1564 | - | 2140 | 1608 | 8 | 10700 |
| 1500 | 2300 | 800 | 9.5 | 47520 | 118800 | NNU 41/1500 | 44827/1500 | 1709 | - | 1570 | 1674 | - | 2260 | 1718 | 8 | 12300 |
| General | |
| Short Description | Size range:Inter diameter 200-1500mm(Customizable within the scope) Material: GCr15/GCr15SiMn/G20Cr2Ni4A Type: NNU and NN series cylindrical roller bearing. The NN design has an inner ring with two ribs and an outer ring without ribs. Double-row cylindrical roller bearings are designed to provide exceptionally high radial load capacity, enhanced rigidity, and stable performance for heavy-duty applications. Featuring two rows of precision-machined cylindrical rollers, this bearing type offers improved load distribution and greater stiffness compared to single-row designs, making it ideal for machinery that demands higher strength and reliability. |

 
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