4T-644 bearing reference breakdown
Below we will break down the 4T-644 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)||71.44||d1 (mm)||99.3||B (mm)||41.28|
|ra max (mm)||3.5|
|Dynamic load C (kN)||194||Rating life coefficient A2||1.4||Static load C0 (kN)||262|
|Fatigue limit load Cu (kN)||31.9||Nlim (oil) (Tr/min)||3800||Nlim (grease) (Tr/min)||2800|
|Min operating temperature Tmin (°C)||-40||Max operating temperature Tmax (°C)||120||Characteristic cage frequency FTF (Hz)||0.43|
|Characteristic rolling element frequency BSF (Hz)||6.57||Characteristic outer ring frequency BPF0 (Hz)||7.7||Characteristic inner ring frequency BPFI (Hz)||10.3|