4T-HM212047/HM212011 - NTN Single Row Taper Roller Bearing
4T-HM212047/HM212011 bearing reference breakdown
Below we will break down the 4T-HM212047/HM212011 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.HM - Indicates that the bearing is part of the heavy medium series
| d (mm) | 63.5 | d1 (mm) | 91.5 | D (mm) | 122.24 |
| B (mm) | 38.35 | C (mm) | 29.72 | T (mm) | 38.1 |
| a (mm) | 27 | e | 0.34 | Y2 | 1.78 |
| Y0 | 0.98 | Mass (kg) | 1.94 |
| ra max (mm) | 7 |
| Dynamic load C (kN) | 187 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 244 |
| Fatigue limit load Cu (kN) | 29.8 | Nlim (oil) (Tr/min) | 4100 | Nlim (grease) (Tr/min) | 3100 |
| 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) | 6.06 | Characteristic outer ring frequency BPF0 (Hz) | 7.17 | Characteristic inner ring frequency BPFI (Hz) | 9.83 |
