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NN3008KTN/SP super precision cylindrical roller bearing specification
| Designation | NN 3008 KTN/SP | |
| Category | ||
| Cylindrical roller bearings, double row, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 40 mm | 1.575 in |
| D (Outer diameter) | 68 mm | 2.677 in |
| B (Width) | 21 mm | 0.827 in |
| W (Weight) | 0.3 kg | 0.66 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 42.9 | |
| C0r (kN) Basic static load rating | 56 | |
| Fatigue load limit (kN) | 6.4 | |
| Attainable speed for grease lubrication (r/min) | 13000 | |
| Attainable speed for oil-air lubrication (r/min) | 15000 | |
| Reference grease quantity (cm3) | 1.8 | |
| Static Radial Stiffness(guideline value) (N/um) | 890 | |
| Internal design | K=tapered bore 1:12 | |
| Cage design | Glass fibre reinforced PA66 cage, roller centred | |
| Precision | SP | |
NN.3008.KTN.SP cylindrical roller bearing 40*68*21 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 3005 K/SP | 25 | 47 | 16 | 26 | 30 | 19 000 | 22 000 |
| NN 3005/SP | 25 | 47 | 16 | 26 | 30 | 19 000 | 22 000 |
| NN 3006 KTN/SP | 30 | 55 | 19 | 30.8 | 37.5 | 17 000 | 19 000 |
| NN 3006 TN/SP | 30 | 55 | 19 | 30.8 | 37.5 | 17 000 | 19 000 |
| NN 3007 K/SP | 35 | 62 | 20 | 39.1 | 50 | 14 000 | 16 000 |
| NN 3007/SP | 35 | 62 | 20 | 39.1 | 50 | 14 000 | 16 000 |
| NN 3008 KTN/SP | 40 | 68 | 21 | 42.9 | 56 | 13 000 | 15 000 |
| NN 3008 TN/SP | 40 | 68 | 21 | 42.9 | 56 | 13 000 | 15 000 |
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