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NNU4952B/SPW33 super precision cylindrical roller bearing specification:
| Designation | NNU-4952-B/SPW33 | |
| Category | ||
| Cylindrical roller bearings, double row, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 260 mm | 8.661 in |
| D (Outer diameter) | 360 mm | 11.811 in |
| B (Width) | 100 mm | 3.15 in |
| W (Weight) | 30.5 kg | 36.4 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 748 | |
| C0r (kN) Basic static load rating | 1700 | |
| Fatigue load limit (kN) | 163 | |
| Attainable speed for grease lubrication (r/min) | 2000 | |
| Attainable speed for oil-air lubrication (r/min) | 2400 | |
| Reference grease quantity (cm3) | 366 | |
| Static Radial Stiffness(guideline value) (N/um) | 6830 | |
| Internal design | B= Modified internal design | |
| Lubrication | Annular groove and three lubrication holes in the outer ring | |
| Precision | SP | |
NNU.4952.B.SPW33 cylindrical roller bearing 260*360*100 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 3048 K/SPW33 | 240 | 360 | 92 | 842 | 1 560 | 2 200 | 2 400 |
| NNU 4948 B/SPW33 | 240 | 320 | 80 | 528 | 1 220 | 2 200 | 2 600 |
| NNU 4948 BK/SPW33 | 240 | 320 | 80 | 528 | 1 220 | 2 200 | 2 600 |
| NN 3052 K/SPW33 | 260 | 400 | 104 | 1 020 | 1 930 | 2 000 | 2 200 |
| NNU 4952 B/SPW33 | 260 | 360 | 100 | 748 | 1 700 | 2 000 | 2 400 |
| NNU 4952 BK/SPW33 | 260 | 360 | 100 | 748 | 1 700 | 2 000 | 2 400 |
| NN 3056 K/SPW33 | 280 | 420 | 106 | 1 080 | 2 080 | 1 900 | 2 000 |
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