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Smarter Bearing Selection Is Here

The Timken® Syber® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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Analyze Bearing Performance in an Application with Timken® Syber® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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  • timken-CRB-NN-Brass-Cage-Large-left-angle-view
  • Two-Row Cylindrical Roller Bearing
  • 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.
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Bore d (mm)

O.D. D (mm)

O.D. D (in)

Width B (mm)

Width B (in)

Dynamic Load Rating C1 (N)

Dynamic Load Rating C1 (lbf)

Thermal Speed Ratings - Oil (rpm)

Thermal Speed Ratings - Grease (rpm)

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

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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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