Single Row Tapered Roller Bearings (Metric Series)

31308

Designation

DIN720 31308

ISO355 T7FB040

Boundary dimensions(mm)

d 40

D 90

B 23

C 17

T 25.25

r1,r2 min 2

r3,r4 min 1.5

a 30

Speed ratings

grease 4000

oil 5300

Load ratings[kN]

dyn Cr 76.5

stat Cor 83

Calculation factors

e 0.83

Y 0.73

Y0 0.4

Abutment and fillet dimensions(mm)

Da max 51

db min 49

Da min 71

Db min 86

Ca min 4

Cb min 8

Mass (kg) 0.75

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