Double row Cylindrical Roller Bearing

Image may differ from product. See technical specification for details.

Standard

GB,ASTM/AISI,ГОСТ,BS,JIS,NF,DIN / VDEh

Material

52100、100Cr6、SUJ2

Inner diameter (d)

25-440mm

Outer diameter (D)

40-1100mm

Mass

0.1-600kg

Brand

QIBR/OEM/Neutral

Package

QIBR/Standard Industrial Package/OEM

Applications

Spinspindle of large motors,Machine tool spindle

Double row Cylindrical Roller Bearing

Filters

NO. Product Product Number Inner diameter (d) Outer diameter (D) Radial dynamic load Static load rating,radial Weight Width (B)
301 NN3048MBKR/ NN3048MBKR 240 mm 360 mm 980 KN 1600 KN 30.4 kg 92 mm
302 NN3048MB/ NN3048MB 240 mm 360 mm 980 KN 1600 KN 30.4 kg 92 mm
303 NN3952MBKR/ NN3952MBKR 260 mm 360 mm 775 KN 1380 KN 21.4 kg 75 mm
304 NN3952MB/ NN3952MB 260 mm 360 mm 775 KN 1380 KN 21.4 kg 75 mm
305 NN4952MBKR/ NN4952MBKR 260 mm 360 mm 1070 KN 2100 KN 28.4 kg 100 mm
306 NN4952MB/ NN4952MB 260 mm 360 mm 1070 KN 2100 KN 28.4 kg 100 mm
307 NNU4952MBKR/ NNU4952MBKR 260 mm 360 mm 1070 KN 2100 KN 28.3 kg 100 mm
308 NNU4952MB/ NNU4952MB 260 mm 360 mm 1070 KN 2100 KN 28.3 kg 100 mm
309 NN3052KR/ NN3052KR 260 mm 400 mm 1030 KN 1920 KN 44.7 kg 104 mm
310 NN3052/ NN3052 260 mm 400 mm 1030 KN 1920 KN 44.7 kg 104 mm
311 NN3956MBKR/ NN3956MBKR 280 mm 380 mm 695 KN 1460 KN 22.8 kg 75 mm
312 NN3956MB/ NN3956MB 280 mm 380 mm 695 KN 1460 KN 22.8 kg 75 mm
313 NN4956KR/ NN4956KR 280 mm 380 mm 960 KN 2230 KN 30.1 kg 100 mm
314 NN4956/ NN4956 280 mm 380 mm 960 KN 2230 KN 30.1 kg 100 mm
315 NNU4956KR/ NNU4956KR 280 mm 380 mm 960 KN 2230 KN 33.1 kg 100 mm
316 NNU4956/ NNU4956 280 mm 380 mm 960 KN 2230 KN 33.1 kg 100 mm
317 NN3056KR/ NN3056KR 280 mm 420 mm 1080 KN 2080 KN 47.7 kg 106 mm
318 NN3056/ NN3056 280 mm 420 mm 1080 KN 2080 KN 47.7 kg 106 mm
319 NN3960KR/ NN3960KR 300 mm 420 mm 855 KN 1800 KN 36.2 kg 90 mm
320 NN3960/ NN3960 300 mm 420 mm 855 KN 1800 KN 36.2 kg 90 mm
321 NN4960KR/ NN4960KR 300 mm 420 mm 1230 KN 2870 KN 47.6 kg 118 mm
322 NN4960/ NN4960 300 mm 420 mm 1230 KN 2870 KN 47.6 kg 118 mm
323 NNU4960KR/ NNU4960KR 300 mm 420 mm 1230 KN 2870 KN 47.6 kg 118 mm
324 NNU4960/ NNU4960 300 mm 420 mm 1230 KN 2870 KN 47.6 kg 118 mm
325 NN3060KR/ NN3060KR 300 mm 460 mm 1290 KN 2460 KN 66.5 kg 118 mm
326 NN3060/ NN3060 300 mm 460 mm 1290 KN 2460 KN 66.5 kg 118 mm
327 NN3964KR/ NN3964KR 320 mm 440 mm 880 KN 1910 KN 38.2 kg 90 mm
328 NN3964/ NN3964 320 mm 440 mm 880 KN 1910 KN 38.2 kg 90 mm
329 NN4964KR/ NN4964KR 320 mm 440 mm 1260 KN 3050 KN 50.3 kg 118 mm
330 NN4964/ NN4964 320 mm 440 mm 1260 KN 3050 KN 50.3 kg 118 mm
331 NNU4964KR/ NNU4964KR 320 mm 440 mm 1260 KN 3050 KN 50.3 kg 118 mm
332 NNU4964/ NNU4964 320 mm 440 mm 1260 KN 3050 KN 50.3 kg 118 mm
333 NN3064KR/ NN3064KR 320 mm 480 mm 1350 KN 2670 KN 71.8 kg 121 mm
334 NN3064/ NN3064 320 mm 480 mm 1350 KN 2670 KN 71.8 kg 121 mm
335 NN4968KR/ NN4968KR 340 mm 460 mm 1350 KN 3400 KN 52.6 kg 118 mm
336 NN4968/ NN4968 340 mm 460 mm 1350 KN 3400 KN 52.6 kg 118 mm
337 NNU4968KR/ NNU4968KR 340 mm 460 mm 1350 KN 3400 KN 52.9 kg 118 mm
338 NNU4968/ NNU4968 340 mm 460 mm 1350 KN 3400 KN 52.9 kg 118 mm
339 NN3068KR/ NN3068KR 340 mm 520 mm 1670 KN 3300 KN 95.6 kg 133 mm
340 NN3068/ NN3068 340 mm 520 mm 1670 KN 3300 KN 95.6 kg 133 mm
341 NN3972KR/ NN3972KR 360 mm 480 mm 930 KN 2130 KN 42.1 kg 90 mm
342 NN3972/ NN3972 360 mm 480 mm 930 KN 2130 KN 42.1 kg 90 mm
343 NN4972KR/ NN4972KR 360 mm 480 mm 1390 KN 3550 KN 55.1 kg 118 mm
344 NN4972/ NN4972 360 mm 480 mm 1390 KN 3550 KN 55.1 kg 118 mm
345 NNU4972KR/ NNU4972KR 360 mm 480 mm 1390 KN 3550 KN 55.2 kg 118 mm
346 NNU4972/ NNU4972 360 mm 480 mm 1390 KN 3550 KN 55.2 kg 118 mm
347 NN3072KR/ NN3072KR 360 mm 540 mm 1700 KN 3450 KN 99.7 kg 134 mm
348 NN3072/ NN3072 360 mm 540 mm 1700 KN 3450 KN 99.7 kg 134 mm
349 NN3976KR/ NN3976KR 380 mm 520 mm 1250 KN 2730 KN 63.5 kg 106 mm
350 NN3976/ NN3976 380 mm 520 mm 1250 KN 2730 KN 63.5 kg 106 mm
351 NN4976KR/ NN4976KR 380 mm 520 mm 1880 KN 4600 KN 81.3 kg 140 mm
352 NN4976/ NN4976 380 mm 520 mm 1880 KN 4600 KN 81.3 kg 140 mm
353 NNU4976KR/ NNU4976KR 380 mm 520 mm 1880 KN 4600 KN 88.8 kg 140 mm
354 NNU4976/ NNU4976 380 mm 520 mm 1880 KN 4600 KN 88.8 kg 140 mm
355 NN3076KR/ NN3076KR 380 mm 560 mm 1770 KN 3700 KN 113 kg 135 mm
356 NN3076/ NN3076 380 mm 560 mm 1770 KN 3700 KN 113 kg 135 mm
357 NN4980KR/ NN4980KR 400 mm 540 mm 1940 KN 4900 KN 84.1 kg 140 mm
358 NN4980/ NN4980 400 mm 540 mm 1940 KN 4900 KN 84.1 kg 140 mm
359 NNU4980KR/ NNU4980KR 400 mm 540 mm 1940 KN 4900 KN 85.1 kg 140 mm
360 NNU4980/ NNU4980 400 mm 540 mm 1940 KN 4900 KN 85.1 kg 140 mm
361 NN3080KR/ NN3080KR 400 mm 600 mm 2090 KN 4300 KN 138 kg 148 mm
362 NN3080/ NN3080 400 mm 600 mm 2090 KN 4300 KN 138 kg 148 mm
363 NN4984K/ NN4984K 420 mm 560 mm 2000 KN 5150 KN 87.9 kg 140 mm
364 NN4984/ NN4984 420 mm 560 mm 2000 KN 5150 KN 87.9 kg 140 mm
365 NNU4984K/ NNU4984K 420 mm 560 mm 2000 KN 5150 KN 88.4 kg 140 mm
366 NNU4984/ NNU4984 420 mm 560 mm 2000 KN 5150 KN 88.4 kg 140 mm
367 NN3084K/ NN3084K 420 mm 620 mm 2130 KN 4450 KN 145 kg 150 mm
368 NN3084/ NN3084 420 mm 620 mm 2130 KN 4450 KN 145 kg 150 mm
369 NN4988K/ NN4988K 440 mm 600 mm 2370 KN 6000 KN 123 kg 160 mm
370 NN4988/ NN4988 440 mm 600 mm 2370 KN 6000 KN 123 kg 160 mm
371 NNU4988K/ NNU4988K 440 mm 600 mm 2370 KN 6000 KN 123 kg 160 mm
372 NNU4988/ NNU4988 440 mm 600 mm 2370 KN 6000 KN 123 kg 160 mm
373 NN3088K/ NN3088K 440 mm 650 mm 2360 KN 4900 KN 166 kg 157 mm
374 NN3088/ NN3088 440 mm 650 mm 2360 KN 4900 KN 166 kg 157 mm
375 NN3992K/ NN3992K 460 mm 620 mm 1610 KN 3700 KN 94.5 kg 118 mm
376 NN3992/ NN3992 460 mm 620 mm 1610 KN 3700 KN 94.5 kg 118 mm
377 NN4992K/ NN4992K 460 mm 620 mm 2400 KN 6200 KN 127 kg 160 mm
378 NN4992/ NN4992 460 mm 620 mm 2400 KN 6200 KN 127 kg 160 mm
379 NNU4992K/ NNU4992K 460 mm 620 mm 2400 KN 6200 KN 128 kg 160 mm
380 NNU4992/ NNU4992 460 mm 620 mm 2400 KN 6200 KN 128 kg 160 mm
381 NN3092K/ NN3092K 460 mm 680 mm 2550 KN 5350 KN 189 kg 163 mm
382 NN3092/ NN3092 460 mm 680 mm 2550 KN 5350 KN 189 kg 163 mm
383 NN4996K/ NN4996K 480 mm 650 mm 2690 KN 7000 KN 151 kg 170 mm
384 NN4996/ NN4996 480 mm 650 mm 2690 KN 7000 KN 151 kg 170 mm
385 NNU4996K/ NNU4996K 480 mm 650 mm 2690 KN 7000 KN 150 kg 170 mm
386 NNU4996/ NNU4996 480 mm 650 mm 2690 KN 7000 KN 150 kg 170 mm
387 NN3096K/ NN3096K 480 mm 700 mm 2600 KN 5550 KN 211 kg 165 mm
388 NN3096/ NN3096 480 mm 700 mm 2600 KN 5550 KN 211 kg 165 mm
389 NN49/500K/ NN49/500K 500 mm 670 mm 2720 KN 7200 KN 155 kg 170 mm
390 NN49/500/ NN49/500 500 mm 670 mm 2720 KN 7200 KN 155 kg 170 mm
391 NNU49/500K/ NNU49/500K 500 mm 670 mm 2720 KN 7200 KN 157 kg 170 mm
392 NNU49/500/ NNU49/500 500 mm 670 mm 2720 KN 7200 KN 157 kg 170 mm
393 NN30/500K/ NN30/500K 500 mm 720 mm 2580 KN 5600 KN 205 kg 167 mm
394 NN30/500/ NN30/500 500 mm 720 mm 2580 KN 5600 KN 205 kg 167 mm
395 NN39/530K/ NN39/530K 530 mm 710 mm 2040 KN 4900 KN 139 kg 136 mm
396 NN39/530/ NN39/530 530 mm 710 mm 2040 KN 4900 KN 139 kg 136 mm
397 NN49/530K/ NN49/530K 530 mm 710 mm 3050 KN 8150 KN 185 kg 180 mm
398 NN49/530/ NN49/530 530 mm 710 mm 3050 KN 8150 KN 185 kg 180 mm
399 NNU49/530K/ NNU49/530K 530 mm 710 mm 3050 KN 8150 KN 186 kg 180 mm
400 NNU49/530/ NNU49/530 530 mm 710 mm 3050 KN 8150 KN 186 kg 180 mm

The double row cylindrical roller bearings have addressed several key issues across various fields, primarily reflected in the following aspects:

1. High rigidity

Due to the double row roller design, these bearings offer higher rigidity compared to single row bearings, effectively reducing vibration and improving equipment stability.

2. Adaptability to high-speed operation:

While primarily designed to handle heavy loads, the precision manufacturing process allows these bearings to support high-speed operation while maintaining smooth performance.

3. Effective noise control

High-precision double row cylindrical roller bearings, through precise installation, proper lubrication, and advanced monitoring systems, can effectively reduce operational noise and enhance overall equipment performance.

4. High cost-effectiveness

The design of double row precision cylindrical roller bearings allows for efficient load support in relatively compact spaces. Their use can reduce costs while improving rigidity and stability.


Performance enhancements and solutions for double row cylindrical roller bearings

1. Dustproof and waterproof design

Especially in harsh environments, bearings require sufficient protection to prevent dust, mud, and other contaminants from entering the bearing interior. Sealing designs can achieve this, thereby avoiding impacts on bearing performance and lifespan.

2. Roller optimization

Optimizing roller shapes can reduce contact stress, improve load capacity, and enhance durability. Surface treatments on rollers can reduce friction, improve rolling precision and load capacity, and extend bearing life.

3. Improved manufacturing precision

Using advanced foreign processing equipment and techniques, such as precision grinding and superfinishing, enhances the geometric accuracy of inner and outer rings and rollers, reducing machining errors and improving rotational precision and surface finish.

4. Enhanced material performance

Surface coating technologies can improve wear resistance and corrosion resistance, effectively extending bearing life, especially in harsh working environments where bearing performance can be significantly enhanced.


Main application fields of double row cylindrical roller bearing

1. Machine tools

In high-precision machine tools, double row precision cylindrical roller bearings are used to withstand heavy loads, ensuring machining accuracy and stability.

2. Locomotive axle boxes

These bearings are widely used in railway locomotive axle boxes. Their design can withstand high loads and effectively prevent the ingress of dust and moisture, improving reliability and service life.

3. Robotics

In industrial and service robots, precision cylindrical roller bearings ensure precise motion and high efficiency.

4. High-precision instruments:

In precision measuring instruments and optical equipment, these bearings support rotating components, ensuring instrument accuracy and stability.