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4T-30204 - NTN

4T-30204

Tapered roller bearing, pressed steel cage

The single row tapered roller bearing is available in metric dimensions (ISO 355 and JIS B 1512 standards) and in inches (ABMA standard, metric series including J). The single row in tapered roller bearing range, is the most widely used and is generally mounted in opposition.

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Technical datasheet

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Specs

PRODUCT DIMENSIONS

Internal diameter d 20 mm
External diameter D 47 mm
Bearing/Inner ring width(B) 14 mm
Outer ring width (C ) 12 mm
Total width (T) 15,25 mm
External diameter inner ring d1 33,5 mm
Charge load application point a 11,5 mm
Min fillet radius rs 1 mm
Min fillet radius r1s 1 mm
Coef e 0.35
Upper axial load coef (Y2) 1.74
Static axial load coef (Y0) 0.96
Mass 0,124 kg
ISO 355 reference T2DB020
Brand NTN
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PRODUCT PERFORMANCE

Dynamic load, C 31 kN
Rating life coefficient, A2 1.0
Static load, C0 28,7 kN
Fatigue limit load, Cu 3,5 kN
Nlim (oil) 12000 tr/min
Nlim (grease) 8800 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,411 Hz
Characteristic rolling element frequency, BSF 5,272 Hz
Characteristic outer ring frequency, BPF0 6,158 Hz
Characteristic inner ring frequency, BPFI 8,842 Hz

ABUTMENT

Max shoulder diameter IR da max 27 mm
Min IR shoulder diameter (db min) 25,5 mm
Min shoulder diameter OR Da min 40 mm
Max shoulder diameter OR Da max 41,5 mm
Min OR shoulder diameter Db min 44 mm
Min clearance Ca 2 mm
Min clearance Cb 3 mm
Max fillet radius ra max 1 mm
Maxi fillet radius r1a 1 mm
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