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NNU4992BK/SPW33 super precision cylindrical roller bearing specification
| Designation | NNU 4992 BK/SPW33 | |
| Category | ||
| Cylindrical roller bearings, double row, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 460 mm | 18.11 in |
| D (Outer diameter) | 620 mm | 24.41 in |
| B (Width) | 160 mm | 6.299 in |
| W (Weight) | 130 kg | 287 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 2090 | |
| C0r (kN) Basic static load rating | 5500 | |
| Fatigue load limit (kN) | 465 | |
| Attainable speed for grease lubrication (r/min) | 1000 | |
| Attainable speed for oil-air lubrication (r/min) | 950 | |
| Reference grease quantity (cm3) | 950 | |
| Internal design | B= Modified internal design K=tapered bore 1:12 | |
| Lubrication | Annular groove and three lubrication holes in the outer ring | |
| Precision | SP | |
NNU.4992.BK/SPW33 cylindrical roller bearing 460*620*160
| Designation | Principal dimensions | Basic load ratings | Attainable speeds | ||||
| dynamic | static | Grease lubrication | Oil-air lubrication | ||||
| d[mm] | D[mm] | B[mm] | C[kN] | C0[kN] | [r/min] | [r/min] | |
| NNU 4980 B/SPW33 | 400 | 540 | 140 | 1 470 | 3 800 | 1 300 | 1 500 |
| NNU 4980 BK/SPW33 | 400 | 540 | 140 | 1 470 | 3 800 | 1 300 | 1 500 |
| NNU 4984 B/SPW33 | 420 | 560 | 140 | 1 510 | 4 000 | 1 200 | 1 400 |
| NNU 4984 BK/SPW33 | 420 | 560 | 140 | 1 510 | 4 000 | 1 200 | 1 400 |
| NN 3092 K/SPW33 | 460 | 680 | 163 | 2 600 | 5 500 | 1 000 | 1 200 |
| NNU 4992 B/SPW33 | 460 | 620 | 160 | 2 090 | 5 500 | 1 000 | 1 200 |
| NNU 4992 BK/SPW33 | 460 | 620 | 160 | 2 090 | 5 500 | 1 000 | 950 |
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