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Bearing 71909 CB/HCP4A (SKF)

Angular contact ball bearings, super-precision 71909 CB/HCP4A

Bearing number : 71909 CB/HCP4A

Size (mm) : 45x68x12

Brand : SKF

Bore Diameter (mm) : 45

Outer Diameter (mm) : 68

Width (mm) : 12

Bearing dimensions and specification in SKF catalogue:

d - 45 mm

D - 68 mm

B - 12 mm

d₁ - 53.45 mm

d₂ - 52.4 mm

D₂ - 61.8 mm

r_1,2 - min. - 0.6 mm

r_3,4 - min. - 0.3 mm

a - 16.1 mm

d_a - min. - 48.2 mm

d_b - min. - 48.2 mm

D_a - max. - 64.8 mm

D_b - max. - 66 mm

r_a - max. - 0.6 mm

r_b - max. - 0.3 mm

d_n - 54.2 mm

Basic dynamic load rating - C - 7.4 kN

Basic static load rating - C₀ - 5.7 kN

Fatigue load limit - P_u - 0.245 kN

Limiting speed for grease lubrication - 32000 r/min

Limiting speed for oil lubrication - 50000 mm/min

Ball - D_w - 4.762 mm

Ball - z - 27

G_ref - 1.75 cm3

Calculation factor - f₀ - 9.7

Preload class A - G_A - 24 N

Preload class B - G_B - 48 N

Preload class C - G_C - 145 N

Calculation factor - f - 1.08

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.03

Calculation factor - f_2C - 1.08

Calculation factor - f_HC - 1.01

Preload class A - 32 N/micron

Preload class B - 41 N/micron

Preload class C - 66 N/micron

Mass bearing - 0.125 kg

Tags :  SKF , 45x68x12