4T-495A/493 - NTN Single Row Taper Roller Bearing
4T-495A/493 - NTN Single Row Taper Roller Bearing
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4T-495A/493 bearing reference breakdown
Below we will break down the 4T-495A/493 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.The suffix can be found at the end of the bearing number:
Suffix
A - Denotes an internal design change (for inch items only)| d (mm) | 76.2 | d1 (mm) | 109.5 | D (mm) | 136.52 |
| B (mm) | 29.77 | C (mm) | 22.22 | T (mm) | 30.16 |
| a (mm) | 29.46 | e | 0.44 | Y2 | 1.35 |
| Y0 | 0.74 | Mass (kg) | 1.83 |
| ra max (mm) | 3.5 |
| Dynamic load C (kN) | 129 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 189 |
| Fatigue limit load Cu (kN) | 22.4 | Nlim (oil) (Tr/min) | 3500 | Nlim (grease) (Tr/min) | 2600 |
| Min operating temperature Tmin (°C) | -40 | Max operating temperature Tmax (°C) | 120 | Characteristic cage frequency FTF (Hz) | 0.45 |
| Characteristic rolling element frequency BSF (Hz) | 9.24 | Characteristic outer ring frequency BPF0 (Hz) | 10.32 | Characteristic inner ring frequency BPFI (Hz) | 12.68 |
