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4T-JLM508748/JLM508710 - NTN Single Row Taper Roller Bearing

4T-JLM508748/JLM508710 - NTN Single Row Taper Roller Bearing

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4T-JLM508748/JLM508710 bearing reference breakdown

Below we will break down the 4T-JLM508748/JLM508710 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:


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.
LM - Denotes that the bearing is part of the light medium series
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)
d (mm) 60 d1 (mm) 78 D (mm) 95
B (mm) 24 C (mm) 19 T (mm) 24
a (mm) 21 e 0.4 Y2 1.49
Y0 0.82 Mass (kg) 0.61
ra max (mm) 5
Dynamic load C (kN) 83 Rating life coefficient A2 1.4 Static load C0 (kN) 122
Fatigue limit load Cu (kN) 14.9 Nlim (oil) (Tr/min) 4900 Nlim (grease) (Tr/min) 3700
Min operating temperature Tmin (°C) -40 Max operating temperature Tmax (°C) 120 Characteristic cage frequency FTF (Hz) 0.45
Characteristic rolling element frequency BSF (Hz) 9.12 Characteristic outer ring frequency BPF0 (Hz) 10.3 Characteristic inner ring frequency BPFI (Hz) 12.7
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