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Cylindrial Roller Bearings NNU4900 Series

Basic Info

Model No.: NNU4900 Series

Rolling Body: Roller Bearings

The Number of Rows: Double

Product Description

Cylindrial Roller Bearings NNU4900 Series are characterized by high radial-, and moderate thrust-load capacities. They contain cylindrically-shaped roller, which are nevertheless not true cylinders. Instead, they are crowned or end-relieved to reduce stress concentrations. This particular geometry results in low friction and allows high-speed applications. Double Row Roller Bearings NNU4900 Series are commonly available in precision grades such as RBEC-5, a classification from the Roller Bearing Engineers Committee (RBEC). RBEC ratings describe the accuracy and tolerance range of different types of bearings. As a rule, the higher the RBEC number, the tighter the bearing tolerances. Typically, Precision Roller Bearings NNU4900 Series are lubricated with oil, which also serves as a coolant.

Precision Roller Bearings NNU4900 Series

Double Row Roller Bearings NNU4900 Series are used in a variety of applications. Examples include mining, petroleum production, power generation, power transmission, cement processing, aggregate crushing, and metal recycling. Some Cylindrical Roller Bearings are used in briquetting machines, rubber mixing equipment, rolling mills, rotary dryers, or pulp and paper machinery. Others are used in construction equipment, crushers, electric motors, blowers and fans, gears and drives, plastics machinery, machine tools and traction motors and pumps.

Precision Roller Bearings NNU4900 Series
Precision Roller Bearings NNU4900 Series feature high radial load capacity because the rollers and raceway are in linear contact. These bearings are suitable for applications that involve heavy radial and impact loading. They are also appropriate for high-speed applications inasmuch as they can be machined very accurately due to their structure. Having a separable inner or outer ring, these bearings can be easily mounted and dismounted.

Code Dimension Load rating Weight ≈
static dynamic
d D B C0 C kg
mm mm mm kN kN
NNU4920M 100 140 40 253 128 1,9
NNU4921M 105 145 40 261 130 2
NNU4922M 110 150 40 276 134 2
NNU4924M 120 165 45 341 175 2,9
NNU4926M 130 180 50 403 206 3,8
NNU4928M 140 190 50 430 213 4,1
NNU4930M 150 210 60 642 325 6
NNU4932M 160 220 60 666 329 6,4
NNU4934M 170 230 60 711 342 6,7
NNU4936M 180 250 69 944 450 6,7
NNU4938M 190 260 69 1.006 467 10,2
NNU4940M 200 280 80 1.155 547 14,5
NNU4944M 220 300 80 1.234 564 15,7
NNU4948M 240 320 80 1.314 580 16,8
NNU4952M 260 360 100 1.983 870 29,6
NNU4956M 280 380 100 2.109 898 31,4
NNU4960M 300 420 118 2.665 1.156 48,7
NNU4964M 320 440 118 2.838 1.196 53,6
NNU4968M 340 460 118 2.929 1.21 56,3
NNU4972M 360 480 118 3.102 1.248 59,2
NNU4976M 380 520 140 3.971 1.61 87,5
NNU4980M 400 540 140 4.21 1.665 91,7
NNU4984M 420 560 140 4.336 1.685 95,4
NNU4988M 440 600 160 5.298 2.082 133
NNU4992M 460 620 160 5.607 2.153 138
NNU4996M 480 650 170 6.106 2.347 163
NNU49/500M 500 670 170 6.285 2.378 169
NNU49/530M 530 710 180 8.25 3.064 201
NNU49/560M 560 750 190 8.86 3.281 241
NNU49/600M 600 800 200 10.249 3.602 282
NNU49/630M 630 850 218 11.393 4.146 359
NNU49/670M 670 900 230 13.868 5.11 408
NNU49/710M 710 950 243 15.893 5.698 489
NNU49/800M 800 1.06 258 17.62 6.234 626


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Product Categories : Roller Bearings > Cylindrical Roller Bearings

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