Products Description
NNU 49 series double row cylindrical roller bearings have three integral flanges on the outer ring and no flanges on the inner ring.
It available with either a cylindrical or a 1:12 tapered bore (designation suffix K). In machine tool applications, cylindrical roller bearings with a tapered bore are preferred over bearings with a cylindrical bore, because the taper enables more accurate adjustment of clearance or preload during mounting.
Bearings in the NNU 49 series, with a very low cross-sectional height, provide a higher degree of stiffness than bearings in the NN 30 series, but a somewhat lower load carrying capacity.
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Technical Parameters
NNU 49 series double row cylindrical roller bearings have three integral flanges on the outer ring and no flanges on the inner ring.
It available with either a cylindrical or a 1:12 tapered bore (designation suffix K). In machine tool applications, cylindrical roller bearings with a tapered bore are preferred over bearings with a cylindrical bore, because the taper enables more accurate adjustment of clearance or preload during mounting.
Bearings in the NNU 49 series, with a very low cross-sectional height, provide a higher degree of stiffness than bearings in the NN 30 series, but a somewhat lower load carrying capacity.
| Bearing Number | d mm | D mm | B mm |
| NNU4917K/W33 | 85 | 120 | 34 |
| NNU4920K/W33 | 100 | 140 | 40 |
| NNU4921K/W33 | 105 | 145 | 40 |
| NNU4922K/W33 | 110 | 150 | 40 |
| NNU4924K/W33 | 120 | 165 | 45 |
| NNU4926K/W33 | 130 | 180 | 50 |
| NNU4926M | 130 | 180 | 50 |
| NNU4928K/W33 | 140 | 190 | 50 |
| NNU4932K/W33 | 160 | 220 | 60 |
| NNU4932M | 160 | 220 | 60 |
| NNU4936K/W33 | 180 | 250 | 69 |
| NNU4938K/W33 | 190 | 260 | 69 |
| NNU4938KM | 190 | 260 | 69 |
| NNU4940K/W33 | 200 | 280 | 180 |
| NNU4944K/W33 | 220 | 300 | 48 |
| NNU3092X2N/YA5 | 460 | 620 | 160 |
| NNU4992/YA5 | 460 | 620 | 160 |
| NNU49/530N/YA6 | 530 | 710 | 180 |
| NNU49/500 | 500 | 670 | 170 |
