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4T-JM207049 - NTN Single Row Taper Roller Bearing
4T-JM207049 - NTN Single Row Taper Roller Bearing
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4T-JM207049 bearing reference breakdown
Below we will break down the 4T-JM207049 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.J - Which denotes the bearing is part of NTN's J-Line metric series, belonging to ABMA norm. Can also be associated with all other ABMA prefix (EL,EH,H,HH,HM,M,LM,L,LL)
M - Denotes that the bearing is part of the medium series
d (mm) | 55 | d1 (mm) | 74.5 | B (mm) | 29 |
e | 0.33 | Y2 | 1.79 | Y0 | 0.99 |
ra max (mm) | 1.5 |
Dynamic load C (kN) | 107 | Rating life coefficient A2 | 1.4 | Static load C0 (kN) | 144 |
Fatigue limit load Cu (kN) | 17.6 | Nlim (oil) (Tr/min) | 5100 | Nlim (grease) (Tr/min) | 3800 |
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) | 7.22 | Characteristic outer ring frequency BPF0 (Hz) | 8.24 | Characteristic inner ring frequency BPFI (Hz) | 10.76 |
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