4T-HM88649/HM88610 - NTN Single Row Taper Roller Bearing
4T-HM88649/HM88610 bearing reference breakdown
Below we will break down the 4T-HM88649/HM88610 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) | 34.92 | d1 (mm) | 56 | D (mm) | 72.23 |
| B (mm) | 25.4 | C (mm) | 19.84 | T (mm) | 25.4 |
| a (mm) | 20.8 | e | 0.55 | Y2 | 1.1 |
| Y0 | 0.6 | Mass (kg) | 0.49 |
| ra max (mm) | 2.3 |
| Dynamic load C (kN) | 65 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 84.5 |
| Fatigue limit load Cu (kN) | 10.3 | Nlim (oil) (Tr/min) | 7200 | Nlim (grease) (Tr/min) | 5400 |
| 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) | 6.92 | Characteristic outer ring frequency BPF0 (Hz) | 7.37 | Characteristic inner ring frequency BPFI (Hz) | 9.63 |
