ZWA
Double-row
Cylindrical Roller Bearing
BORE 280-360mm
Double-row cylindrical roller bearing has cylindrical and tapered hole (code K) two structures. There are two main types in ZWA :NNU design and NN design. N Double inner rib and no outer rib. NNU type design inner ring without baffle and outer ring with double baffle. The tapered hole structure can adjust the radial clearance during installation.
Basic Type
the products include
| Double-row Cylindrical Roller Bearing | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d 280-360mm | |||||||||||||||
| Basic Size | Basic load rating | Designation(Design) | Abutment and chamfer dimensions | Mass | |||||||||||
| d | D | B | rsmin | FW | EW | dynamic | static | Cylindrical bore | Tapered bore | da(2) | d1a | dc min | Da | ra max | |
| C | Co | ||||||||||||||
| mm | kN | mm | kg | ||||||||||||
| 280 | 350 | 69 | 1.1 | - | 329 | 445 | 1160 | NN4856 | - | 293 | - | - | 336 | 1 | 15.3 |
| 280 | 380 | 75 | 2.1 | - | 355 | 695 | 1460 | NN3956 | NN3956K | 297 | 304 | - | 361 | 2 | 22.7 |
| 280 | 380 | 100 | 2.1 | - | 355 | 960 | 2230 | NN4956 | NN4956K | 297 | 306 | - | 361 | 2 | 32.9 |
| 280 | 380 | 100 | 2.1 | 309 | - | 960 | 2230 | NNU4956 | NNU4956K | 297 | 306 | 315 | 361 | 2 | 33 |
| 280 | 420 | 106 | 4 | - | 384 | 1080 | 2080 | NN3056 | NN3056K | 302 | 311 | - | 395 | 3 | 51.1 |
| 280 | 420 | 106 | 4 | 320 | - | 1080 | 2080 | NNU3056 | - | 302 | - | 326 | 395 | 3 | 51.4 |
| 280 | 460 | 146 | 5 | - | 413 | 1520 | 2790 | NN3156 | NN3156K | 306 | 319 | - | 431 | 4 | 95.7 |
| 300 | 380 | 80 | 2.1 | 324 | - | 690 | 1760 | NNU4860 | - | 318 | - | 331 | 361 | 2 | 21.7 |
| 300 | 420 | 118 | 3 | - | 388 | 1230 | 2870 | NN4960 | NN4960K | 320 | 330 | - | 398 | 2.5 | 51.6 |
| 300 | 420 | 118 | 3 | 336 | - | 1230 | 2870 | NNU4960 | NNU4960K | 320 | 330 | 343 | 398 | 2.5 | 51.9 |
| 300 | 460 | 118 | 4 | - | 418 | 1290 | 2460 | NN3060 | NN3060K | 323 | 333 | - | 435 | 3 | 70.7 |
| 300 | 460 | 160 | 4 | - | 418 | 1920 | 4100 | NN4060 | NN4060K | 323 | 336 | - | 435 | 3 | 97.6 |
| 300 | 500 | 160 | 5 | - | 448 | 1760 | 3150 | NN3160 | NN3160K | 327 | 340 | - | 470 | 4 | 125 |
| 300 | 500 | 160 | 5 | 358 | - | 1760 | 3150 | NNU3160 | - | 327 | - | 365 | 470 | 4 | 126 |
| 320 | 400 | 80 | 2.1 | 344 | - | 700 | 1840 | NNU4864 | - | 338 | - | 351 | 381 | 2 | 22.8 |
| 320 | 440 | 118 | 3 | - | 408 | 1260 | 3050 | NN4964 | NN4964K | 340 | 350 | - | 418 | 2.5 | 50.2 |
| 320 | 440 | 118 | 3 | 356 | - | 1260 | 3050 | NNU4964 | NNU4964K | 340 | 350 | 363 | 418 | 2.5 | 54.9 |
| 320 | 480 | 121 | 4 | - | 438 | 1350 | 2670 | NN3064 | NN3064K | 343 | 354 | - | 454 | 3 | 76.6 |
| 320 | 480 | 121 | 4 | 366 | - | 1350 | 2670 | NNU3064 | NNU3064K | 343 | 354 | 373 | 454 | 3 | 76.9 |
| 320 | 480 | 160 | 4 | 367 | - | 1960 | 4300 | NNU4064 | - | 343 | - | 374 | 454 | 3 | 103 |
| 320 | 540 | 176 | 5 | 384 | - | 2090 | 3750 | NNU3164 | NNU3164K | 347 | 362 | 391 | 509 | 4 | 154 |
| 340 | 460 | 90 | 3 | - | 428 | 905 | 2020 | NN3968 | NN3968K | 361 | 368 | - | 438 | 2.5 | 42.9 |
| 340 | 460 | 118 | 3 | - | 428 | 1350 | 3400 | NN4968 | NN4968K | 361 | 371 | - | 438 | 2.5 | 52.1 |
| 340 | 460 | 118 | 3 | 376 | - | 1350 | 3400 | NNU4968 | - | 361 | - | 383 | 438 | 2.5 | 57.8 |
| 340 | 520 | 133 | 5 | - | 473 | 1670 | 3300 | NN3068 | NN3068K | 368 | 379 | - | 490 | 4 | 102 |
| 340 | 520 | 133 | 5 | 393 | - | 1670 | 3300 | NNU3068 | - | 368 | - | 400 | 490 | 4 | 103 |
| 340 | 520 | 180 | 5 | 393 | - | 2420 | 5350 | NNU4068 | - | 368 | - | 400 | 490 | 4 | 141 |
| 360 | 480 | 90 | 3 | - | 448 | 930 | 2130 | NN3972 | - | 381 | - | - | 457 | 2.5 | 44.9 |
| 360 | 480 | 118 | 3 | 396 | - | 1390 | 3550 | NNU4972 | - | 381 | - | 403 | 457 | 2.5 | 60.6 |
| 360 | 540 | 134 | 5 | - | 493 | 1700 | 3450 | NN3072 | NN3072K | 388 | 399 | - | 509 | 4 | 106 |
| 360 | 540 | 134 | 5 | 413 | - | 1700 | 3450 | NNU3072 | - | 388 | - | 420 | 509 | 4 | 108 |
| 360 | 540 | 180 | 5 | - | 496 | 2530 | 5450 | NN4072 | NN4072K | 388 | 403 | - | 509 | 4 | 132 |
