4T-LL639249/LL639210 - NTN Single Row Taper Roller Bearing
4T-LL639249/LL639210 - NTN Single Row Taper Roller Bearing
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4T-LL639249/LL639210 bearing reference breakdown
Below we will break down the 4T-LL639249/LL639210 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 prefix can be found at the beginning of the bearing code:
Prefix
4T - The 4T- prefix designates a tapered roller bearing that is made of a special grade of case-hardened bearing steel and is interchangeable with other manufacturers taper with the same part number.LL - Denotes that the bearing is part of the lighter than light series
| d (mm) | 196.85 | d1 (mm) | 218.5 | D (mm) | 241.3 |
| B (mm) | 23.02 | C (mm) | 17.46 | T (mm) | 23.81 |
| a (mm) | 41.11 | e | 0.42 | Y2 | 1.44 |
| Y0 | 0.79 | Mass (kg) | 2.07 |
| ra max (mm) | 1.5 |
| Dynamic load C (kN) | 160 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 330 |
| Fatigue limit load Cu (kN) | 31.8 | Nlim (oil) (Tr/min) | 1600 | Nlim (grease) (Tr/min) | 1200 |
| Min operating temperature Tmin (°C) | -40 | Max operating temperature Tmax (°C) | 120 | Characteristic cage frequency FTF (Hz) | 0.48 |
| Characteristic rolling element frequency BSF (Hz) | 19.49 | Characteristic outer ring frequency BPF0 (Hz) | 23.77 | Characteristic inner ring frequency BPFI (Hz) | 26.23 |
