4T-9378/9321 - NTN Single Row Taper Roller Bearing
4T-9378/9321 bearing reference breakdown
Below we will break down the 4T-9378/9321 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.| d (mm) | 76.2 | D (mm) | 171.45 | B (mm) | 50.8 |
| C (mm) | 31.75 | T (mm) | 49.21 | a (mm) | 53.6 |
| rs min (mm) | 3.56 | r1s min (mm) | 3.3 | e | 0.76 |
| Y2 | 0.79 | Y0 | 0.43 | Mass (kg) | 5.35 |
| ra max (mm) | 3.5 |
| Dynamic load C (kN) | 265 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 325 |
| Nlim (oil) (Tr/min) | 2700 | Nlim (grease) (Tr/min) | 2200 | Min operating temperature Tmin (°C) | -40 |
| Max operating temperature Tmax (°C) | 120 | Characteristic cage frequency FTF (Hz) | 0.42 | Characteristic rolling element frequency BSF (Hz) | 5.61 |
| Characteristic outer ring frequency BPF0 (Hz) | 6.34 | Characteristic inner ring frequency BPFI (Hz) | 8.66 |
