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4T-30203 - NTN

4T-30203

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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PRODUCT DIMENSIONS

Internal diameter d 17 mm
External diameter D 40 mm
Bearing/Inner ring width(B) 12 mm
Outer ring width (C ) 11 mm
Total width (T) 13,25 mm
External diameter inner ring d1 28,5 mm
Charge load application point a 9,5 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 0,08 kg
ISO 355 reference T2DB017
Brand NTN
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PRODUCT PERFORMANCE

Dynamic load, C 22,7 kN
Rating life coefficient, A2 1.0
Static load, C0 20,3 kN
Fatigue limit load, Cu 2,48 kN
Nlim (oil) 13000 tr/min
Nlim (grease) 9900 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 23 mm
Min IR shoulder diameter (db min) 22,5 mm
Min shoulder diameter OR Da min 33 mm
Max shoulder diameter OR Da max 34,5 mm
Min OR shoulder diameter Db min 37 mm
Min clearance Ca 2 mm
Min clearance Cb 2 mm
Max fillet radius ra max 1 mm
Maxi fillet radius r1a 1 mm
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