Aurora Bearing Company
Aurora Bearing Company
901 Aucutt Rd.
Montgomery, IL 60538
Phone: 630.859.2030 • Fax: 630.859.0971
Email: customersupport@aurorabearing.com • Website: www.aurorabearing.com
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  • Additional radial load-carrying capability compared to single-row product.
  • Designed to ISO/DIN specified interchangeable dimensions.
  • Sold as complete assembly.

NNU-1
  • Outer rings with solid ribs.
  • Lubrication grooves and holes on outer rings.
  • One solid brass cage.

The radial internal clearance (RIC) for the bearing assembly must be included when ordering the complete assembly.
timken-CRB-NN-Brass-Cage-Large-left-angle-view
Two-Row Cylindrical Roller Bearing
Unit of Measure
1 2 

Part Number

Bore d

O.D. D

Width B

DUR/DOR F/E

Static Load Rating Co

Dynamic Load Rating C1

Thermal Speed Ratings - Oil

Thermal Speed Ratings - Grease

CAD

NNU4930MAW33 N/A 150 mm N/A 210 mm8.2677 in N/A 60 mm2.3622 in N/A 168.5 mm6.6339 in N/A 668000 N150200 lbf N/A 374000 N84100 lbf N/A 2100 rpm N/A 1800 rpm N/A CAD Icon (for items table)
NNU4932MAW33 N/A 160 mm N/A 220 mm8.6614 in N/A 60 mm2.3622 in N/A 178.5 mm7.0276 in N/A 692000 N155600 lbf N/A 380000 N85300 lbf N/A 2000 rpm N/A 1700 rpm N/A CAD Icon (for items table)
NNU4934MAW33 N/A 170 mm N/A 230 mm9.0551 in N/A 60 mm2.3622 in N/A 188.5 mm7.4213 in N/A 696000 N156200 lbf N/A 376000 N84600 lbf N/A 1900 rpm N/A 1600 rpm N/A CAD Icon (for items table)
NNU4936MAW33 N/A 180 mm N/A 250 mm9.8425 in N/A 69 mm2.7165 in N/A 202 mm7.9528 in N/A 850000 N191000 lbf N/A 449000 N101000 lbf N/A 1700 rpm N/A 1500 rpm N/A CAD Icon (for items table)
NNU4938MAW33 N/A 190 mm N/A 260 mm10.2362 in N/A 69 mm2.7165 in N/A 212 mm8.3465 in N/A 890000 N200000 lbf N/A 459000 N103000 lbf N/A 1600 rpm N/A 1400 rpm N/A CAD Icon (for items table)
NNU4940MAW33 N/A 200 mm N/A 280 mm11.0236 in N/A 80 mm3.1496 in N/A 225 mm8.8583 in N/A 1046000 N234000 lbf N/A 550000 N124000 lbf N/A 1500 rpm N/A 1300 rpm N/A CAD Icon (for items table)
NNU4140MAW33 N/A 200 mm N/A 340 mm13.3858 in N/A 140 mm5.5118 in N/A 235 mm9.2520 in N/A 2460000 N552000 lbf N/A 1690000 N381000 lbf N/A 1200 rpm N/A 1100 rpm N/A CAD Icon (for items table)
NNU4944MAW33 N/A 220 mm N/A 300 mm11.811 in N/A 80 mm3.1496 in N/A 245 mm9.6457 in N/A 1150000 N258000 lbf N/A 577000 N130000 lbf N/A 1400 rpm N/A 1200 rpm N/A CAD Icon (for items table)
NNU4144MAW33 N/A 220 mm N/A 370 mm14.5669 in N/A 150 mm5.9055 in N/A 258 mm10.1575 in N/A 2960000 N666000 lbf N/A 1930000 N434000 lbf N/A 1000 rpm N/A 940 rpm N/A CAD Icon (for items table)
NNU4948MAW33 N/A 240 mm N/A 320 mm12.5984 in N/A 80 mm3.1496 in N/A 265 mm10.4331 in N/A 1220000 N274000 lbf N/A 591000 N133000 lbf N/A 1200 rpm N/A 1100 rpm N/A CAD Icon (for items table)
NNU4148MAW33 N/A 240 mm N/A 400 mm15.748 in N/A 160 mm6.2992 in N/A 282 mm11.1024 in N/A 3680000 N828000 lbf N/A 2290000 N515000 lbf N/A 870 rpm N/A 800 rpm N/A CAD Icon (for items table)
NNU4952MAW33 N/A 260 mm N/A 360 mm14.1732 in N/A 100 mm3.937 in N/A 292 mm11.4961 in N/A 1710000 N385000 lbf N/A 856000 N192000 lbf N/A 1100 rpm N/A 950 rpm N/A CAD Icon (for items table)
NNU4152MAW33 N/A 260 mm N/A 440 mm17.3228 in N/A 180 mm7.0866 in N/A 306 mm12.0472 in N/A 4540000 N1022000 lbf N/A 2840000 N639000 lbf N/A 760 rpm N/A 710 rpm N/A CAD Icon (for items table)
NNU4956MAW33 N/A 280 mm N/A 380 mm14.9606 in N/A 100 mm3.937 in N/A 312 mm12.2835 in N/A 1834000 N412000 lbf N/A 880000 N198000 lbf N/A 1000 rpm N/A 880 rpm N/A CAD Icon (for items table)
NNU4156MAW33 N/A 280 mm N/A 460 mm18.1102 in N/A 180 mm7.0866 in N/A 326 mm12.8346 in N/A 4820000 N1084000 lbf N/A 2940000 N660000 lbf N/A 990 rpm N/A 910 rpm N/A CAD Icon (for items table)
NNU4960MAW33 N/A 300 mm N/A 420 mm16.5354 in N/A 118 mm4.6457 in N/A 339 mm13.3465 in N/A 2380000 N536000 lbf N/A 1170000 N263000 lbf N/A 880 rpm N/A 780 rpm N/A CAD Icon (for items table)
NNU4160MAW33 N/A 300 mm N/A 500 mm19.685 in N/A 200 mm7.874 in N/A 351 mm13.8189 in N/A 6140000 N1382000 lbf N/A 3780000 N850000 lbf N/A 600 rpm N/A 560 rpm N/A CAD Icon (for items table)
NNU4964MAW33 N/A 320 mm N/A 440 mm17.3228 in N/A 118 mm4.6457 in N/A 359 mm14.1339 in N/A 2660000 N598000 lbf N/A 1270000 N285000 lbf N/A 790 rpm N/A 710 rpm N/A CAD Icon (for items table)
NNU4164MAW33 N/A 320 mm N/A 540 mm21.2598 in N/A 218 mm8.5827 in N/A 375 mm14.7638 in N/A 6280000 N1410000 lbf N/A 3940000 N886000 lbf N/A 590 rpm N/A 550 rpm N/A CAD Icon (for items table)
NNU4968MAW33 N/A 340 mm N/A 460 mm18.1102 in N/A 118 mm4.6457 in N/A 379 mm14.9213 in N/A 2660000 N598000 lbf N/A 1250000 N282000 lbf N/A 760 rpm N/A 670 rpm N/A CAD Icon (for items table)
NNU4068MAW33 N/A 340 mm N/A 520 mm20.4724 in N/A 180 mm7.0866 in N/A 385 mm15.1575 in N/A 5130000 N1153000 lbf N/A 2980000 N669000 lbf N/A 610 rpm N/A 560 rpm N/A CAD Icon (for items table)
NNU4168MAW33 N/A 340 mm N/A 580 mm22.8346 in N/A 243 mm9.5669 in N/A 402 mm15.8268 in N/A 7580000 N1704000 lbf N/A 4660000 N1050000 lbf N/A 530 rpm N/A 490 rpm N/A CAD Icon (for items table)
NNU4972MAW33 N/A 360 mm N/A 480 mm18.8976 in N/A 118 mm4.6457 in N/A 399 mm15.7087 in N/A 2800000 N630000 lbf N/A 1270000 N285000 lbf N/A 710 rpm N/A 630 rpm N/A CAD Icon (for items table)
NNU4072MAW33 N/A 360 mm N/A 540 mm21.2598 in N/A 180 mm7.0866 in N/A 405 mm15.9449 in N/A 5580000 N1256000 lbf N/A 3180000 N716000 lbf N/A 560 rpm N/A 510 rpm N/A CAD Icon (for items table)
NNU4172MAW33 N/A 360 mm N/A 600 mm23.6220 in N/A 243 mm9.5669 in N/A 422 mm16.6142 in N/A 8480000 N1906000 lbf N/A 5000000 N1120000 lbf N/A 470 rpm N/A 440 rpm N/A CAD Icon (for items table)
NNU4976MAW33 N/A 380 mm N/A 520 mm20.4724 in N/A 140 mm5.5118 in N/A 426 mm16.7717 in N/A 3720000 N836000 lbf N/A 1660000 N373000 lbf N/A 630 rpm N/A 560 rpm N/A CAD Icon (for items table)
NNU4076MAW33 N/A 380 mm N/A 560 mm22.0472 in N/A 180 mm7.0866 in N/A 425 mm16.7323 in N/A 5860000 N1316000 lbf N/A 3260000 N733000 lbf N/A 530 rpm N/A 480 rpm N/A CAD Icon (for items table)
NNU4176MAW33 N/A 380 mm N/A 620 mm24.4094 in N/A 243 mm9.5669 in N/A 442 mm17.4016 in N/A 8520000 N1916000 lbf N/A 4990000 N1120000 lbf N/A 460 rpm N/A 430 rpm N/A CAD Icon (for items table)
NNU4980MAW33 N/A 400 mm N/A 540 mm21.2598 in N/A 140 mm5.5118 in N/A 446 mm17.5591 in N/A 3920000 N882000 lbf N/A 1710000 N384000 lbf N/A 600 rpm N/A 530 rpm N/A CAD Icon (for items table)
NNU4080MAW33 N/A 400 mm N/A 600 mm23.6220 in N/A 200 mm7.874 in N/A 449 mm17.6772 in N/A 7210000 N1621000 lbf N/A 3970000 N893000 lbf N/A 460 rpm N/A 430 rpm N/A CAD Icon (for items table)
NNU4180MAW33 N/A 400 mm N/A 650 mm25.5906 in N/A 250 mm9.8425 in N/A 463 mm18.2283 in N/A 9460000 N2120000 lbf N/A 5530000 N1240000 lbf N/A 410 rpm N/A 390 rpm N/A CAD Icon (for items table)
NNU4984MAW33 N/A 420 mm N/A 560 mm22.0472 in N/A 140 mm5.5118 in N/A 466 mm18.3465 in N/A 4140000 N928000 lbf N/A 1750000 N394000 lbf N/A 560 rpm N/A 500 rpm N/A CAD Icon (for items table)
NNU4084MAW33 N/A 420 mm N/A 620 mm24.4094 in N/A 200 mm7.874 in N/A 469 mm18.4646 in N/A 7600000 N1706000 lbf N/A 4070000 N914000 lbf N/A 430 rpm N/A 400 rpm N/A CAD Icon (for items table)
NNU4184MAW33 N/A 420 mm N/A 700 mm27.5591 in N/A 280 mm11.0236 in N/A 497 mm19.5669 in N/A 11420000 N2560000 lbf N/A 6430000 N1450000 lbf N/A 370 rpm N/A 350 rpm N/A CAD Icon (for items table)
NNU4988MAW33 N/A 440 mm N/A 600 mm23.6220 in N/A 160 mm6.2992 in N/A 490 mm19.2913 in N/A 5740000 N1292000 lbf N/A 2500000 N562000 lbf N/A 460 rpm N/A 420 rpm N/A CAD Icon (for items table)
NNU4088MAW33 N/A 440 mm N/A 650 mm25.5906 in N/A 212 mm8.3465 in N/A 487 mm19.1732 in N/A 8180000 N1840000 lbf N/A 4530000 N1020000 lbf N/A 410 rpm N/A 380 rpm N/A CAD Icon (for items table)
NNU4188MAW33 N/A 440 mm N/A 720 mm28.3465 in N/A 280 mm11.0236 in N/A 511 mm20.1181 in N/A 11400000 N2560000 lbf N/A 6620000 N1490000 lbf N/A 370 rpm N/A 340 rpm N/A CAD Icon (for items table)
NNU4992MAW33 N/A 460 mm N/A 620 mm24.4094 in N/A 160 mm6.2992 in N/A 510 mm20.0787 in N/A 5540000 N1246000 lbf N/A 2420000 N544000 lbf N/A 460 rpm N/A 420 rpm N/A CAD Icon (for items table)
NNU4092MAW33 N/A 460 mm N/A 680 mm26.7717 in N/A 218 mm8.5827 in N/A 513 mm20.1969 in N/A 9420000 N2120000 lbf N/A 4980000 N1120000 lbf N/A 370 rpm N/A 340 rpm N/A CAD Icon (for items table)
NNU4192MAW33 N/A 460 mm N/A 760 mm29.9213 in N/A 300 mm11.8110 in N/A 537 mm21.1417 in N/A 12960000 N2920000 lbf N/A 7440000 N1670000 lbf N/A 330 rpm N/A 320 rpm N/A CAD Icon (for items table)
NNU4996MAW33 N/A 480 mm N/A 650 mm25.5906 in N/A 170 mm6.6929 in N/A 534 mm21.0236 in N/A 6160000 N1382000 lbf N/A 2680000 N602000 lbf N/A 430 rpm N/A 390 rpm N/A CAD Icon (for items table)
NNU4096MAW33 N/A 480 mm N/A 700 mm27.5591 in N/A 218 mm8.5827 in N/A 533 mm20.9843 in N/A 9730000 N2189000 lbf N/A 5090000 N1150000 lbf N/A 350 rpm N/A 330 rpm N/A CAD Icon (for items table)
NNU4196MAW33 N/A 480 mm N/A 790 mm31.1024 in N/A 308 mm12.1260 in N/A 557 mm21.9291 in N/A 14260000 N3200000 lbf N/A 8190000 N1840000 lbf N/A 310 rpm N/A 290 rpm N/A CAD Icon (for items table)
NNU49/500MAW33 N/A 500 mm N/A 670 mm26.3780 in N/A 170 mm6.6929 in N/A 554 mm21.8110 in N/A 6280000 N1410000 lbf N/A 2690000 N605000 lbf N/A 420 rpm N/A 380 rpm N/A CAD Icon (for items table)
NNU49/500MAW33C3 N/A 500 mm N/A 670 mm26.3780 in N/A 170 mm6.6929 in N/A 554 mm21.8110 in N/A 6280000 N1410000 lbf N/A 2690000 N605000 lbf N/A 420 rpm N/A 380 rpm N/A CAD Icon (for items table)
NNU40/500MAW33 N/A 500 mm N/A 720 mm28.3465 in N/A 218 mm8.5827 in N/A 553 mm21.7717 in N/A 10560000 N2380000 lbf N/A 5550000 N1250000 lbf N/A 330 rpm N/A 310 rpm N/A CAD Icon (for items table)
NNU49/530MAW33 N/A 530 mm N/A 710 mm27.9528 in N/A 180 mm7.0866 in N/A 588 mm23.1496 in N/A 8180000 N1839000 lbf N/A 3360000 N755000 lbf N/A 350 rpm N/A 320 rpm N/A CAD Icon (for items table)
NNU40/530MAW33 N/A 530 mm N/A 780 mm30.7087 in N/A 250 mm9.8425 in N/A 591 mm23.2677 in N/A 12160000 N2740000 lbf N/A 6330000 N1420000 lbf N/A 300 rpm N/A 280 rpm N/A CAD Icon (for items table)
NNU49/560MAW33 N/A 560 mm N/A 750 mm29.5276 in N/A 190 mm7.4803 in N/A 623 mm24.5276 in N/A 8780000 N1976000 lbf N/A 3590000 N808000 lbf N/A 330 rpm N/A 300 rpm N/A CAD Icon (for items table)
NNU49/600MAW33 N/A 600 mm N/A 800 mm31.4961 in N/A 200 mm7.874 in N/A 666 mm26.2205 in N/A 10120000 N2280000 lbf N/A 4040000 N907000 lbf N/A 290 rpm N/A 270 rpm N/A CAD Icon (for items table)
Unit of Measure
1 2