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14:56:05 GMT+0000 (Coordinated Universal Time)
NNU4948-S-K-M-SP
Cylindrical roller bearing
Super precision cylindrical roller bearings NNU49..-S-K-M-SP, non-locating bearing, double row, with tapered bore, taper 1:12, separable, with cage
Product information
Main Dimensions & Performance Data
| d | 240 mm | Bore diameter |
| D | 320 mm | Outside diameter |
| B | 80 mm | Width |
| Cr | 530.000 N | Basic dynamic load rating, radial |
| C0r | 1.210.000 N | Basic static load rating, radial |
| Cur | 138.000 N | Fatigue load limit, radial |
| nG Grease | 2.400 1/min | Limiting speed for grease lubrication |
| nG Oil | 2.800 1/min | Limiting speed for oil lubrication |
| ≈m | 25,6 kg | Weight |
Mounting dimensions
| da | 263 mm | Diameter shaft shoulder |
h12 | Diameter shaft shoulder tolerance | |
| Da | 299 mm | Diameter of housing shoulder |
H12 | Diameter of housing shoulder tolerance | |
| ra1 max | 2,1 mm | Maximum recess radius |
Dimensions
| r1 min | 2,1 mm | Minimum chamfer dimension |
| F | 265 mm | Raceway diameter inner ring |
| ns | 12,2 mm | Width of lubricating groove |
| ds | 6,3 mm | Diameter lubrication hole |
| s | 4,3 mm | Axial displacement |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 150 °C | Operating temperature max. |