4T-L21549/L21511 - NTN Single Row Taper Roller Bearing

  • £25.84

4T-L21549/L21511 bearing reference breakdown

Below we will break down the 4T-L21549/L21511 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.
L - Denotes the bearing is part of the light series
d (mm) 15.88 D (mm) 34.99 B (mm) 11
C (mm) 8.71 T (mm) 11 a (mm) 7.7
rs min (mm) 1.3 r1s min (mm) 1.3 e 0.32
Y2 1.88 Y0 1.04 Mass (kg) 0.05
ra max (mm) 1.3
Dynamic load C (kN) 14 Rating life coefficient A2 1.4 Static load C0 (kN) 13.7
Nlim (oil) (Tr/min) 15000 Nlim (grease) (Tr/min) 11000 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) 5.69
Characteristic outer ring frequency BPF0 (Hz) 5.83 Characteristic inner ring frequency BPFI (Hz) 8.17

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