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6904LLUNR/2AS - NTN Single Row Deep Groove Ball Bearing
6904LLUNR/2AS - NTN Single Row Deep Groove Ball Bearing
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6904LLUNR/2AS bearing reference breakdown
Below we will break down the 6904LLUNR/2AS bearing reference and provide an explanation for each section provided it can actually be broken down. We can split it into 3 parts the prefix, suffix and body of the item code.
The suffix can be found at the end of the bearing number:
Suffix
LLU - Indicates a nitrile double lip contact seal2AS - Denotes standard grease for sealed and shielded bearings (-25°C up to +120°C)
NR - Indicates a groove and snap ring on the outer ring
The body of the bearing reference is what is left after removing the suffix and the prefix:
Body
69 - Metric, Minature, Extra Light Series Deep Groove Ball Bearing04 - 20mm Bore Size
| d (mm) | 20 | D (mm) | 37 | B (mm) | 9 |
| a min (mm) | 1.55 | a max (mm) | 1.7 | rs min (mm) | 0.3 |
| rNs min (mm) | 0.3 | Mass (kg) | 0.04 | Ca min (mm) | 2.4 |
| Ca max (mm) | 2.55 | D3 max (mm) | 35.7 | b min (mm) | 0.95 |
| b max (mm) | 1.2 | r0 max (mm) | 0.25 | D4 max (mm) | 39.8 |
| f (mm) | 0.85 |
| da min (mm) | 22 | da max (mm) | 24 | Da max (mm) | 35 |
| ra max (mm) | 0.3 | rNa max (mm) | 0.3 | Db min (mm) | 40.5 |
| Dynamic load C (kN) | 6.4 | Static load C0 (kN) | 3.7 | Fatigue limit load Cu (kN) | 0.17 |
| f0 | 14.7 | Nlim (grease) (Tr/min) | 12000 | Min operating temperature Tmin (°C) | -25 |
| Max operating temperature Tmax (°C) | 110 | Characteristic cage frequency FTF (Hz) | 0.42 | Characteristic rolling element frequency BSF (Hz) | 5.82 |
| Characteristic outer ring frequency BPF0 (Hz) | 4.58 | Characteristic inner ring frequency BPFI (Hz) | 6.42 |
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