4T-1280 bearing reference breakdown
Below we will break down the 4T-1280 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:
Prefix4T - 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)||22.22||d1 (mm)||39.5||B (mm)||22.22|
|ra max (mm)||0.8|
|Dynamic load C (kN)||47||Rating life coefficient A2||1.4||Static load C0 (kN)||49.5|
|Fatigue limit load Cu (kN)||6||Nlim (oil) (Tr/min)||9500||Nlim (grease) (Tr/min)||7100|
|Min operating temperature Tmin (°C)||-40||Max operating temperature Tmax (°C)||120||Characteristic cage frequency FTF (Hz)||0.4|
|Characteristic rolling element frequency BSF (Hz)||4.81||Characteristic outer ring frequency BPF0 (Hz)||5.23||Characteristic inner ring frequency BPFI (Hz)||7.77|