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NNU4944B/SPW33 super precision cylindrical roller bearing specification
| Designation | NNU-4944-B/SPW33 | |
| Category | ||
| Cylindrical roller bearings, double row, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 220 mm | 8.661 in |
| D (Outer diameter) | 300 mm | 11.811 in |
| B (Width) | 80 mm | 3.15 in |
| W (Weight) | 16.5 kg | 36.4 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 512 | |
| C0r (kN) Basic static load rating | 1140 | |
| Fatigue load limit (kN) | 114 | |
| Attainable speed for grease lubrication (r/min) | 2400 | |
| Attainable speed for oil-air lubrication (r/min) | 2800 | |
| Reference grease quantity (cm3) | 150 | |
| Static Radial Stiffness(guideline value) (N/um) | 5990 | |
| Internal design | B= Modified internal design | |
| Lubrication | Annular groove and three lubrication holes in the outer ring | |
| Precision | SP | |
NNU.4944.B/SPW33 cylindrical roller bearing 220*300*80 mm
| 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] | |
| NN 3040 K/SPW33 | 200 | 310 | 82 | 644 | 1 140 | 2 600 | 2 800 |
| NNU 4940 B/SPW33 | 200 | 280 | 80 | 484 | 1 040 | 2 600 | 3 000 |
| NNU 4940 BK/SPW33 | 200 | 280 | 80 | 484 | 1 040 | 2 600 | 3 000 |
| NN 3044 K/SPW33 | 220 | 340 | 90 | 809 | 1 460 | 2 400 | 2 600 |
| NNU 4944 B/SPW33 | 220 | 300 | 80 | 512 | 1 140 | 2 400 | 2 800 |
| NNU 4944 BK/SPW33 | 220 | 300 | 80 | 512 | 1 140 | 2 400 | 2 800 |
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