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Bearing 71909 CD/P4A (SKF)

Angular contact ball bearings, super-precision 71909 CD/P4A

Bearing number : 71909 CD/P4A

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 - 52.6 mm

d₂ - 52.6 mm

D₁ - 60.4 mm

r_1,2 - min. - 0.6 mm

r_3,4 - min. - 0.3 mm

a - 13.6 mm

d_a - min. - 48.2 mm

d_b - min. - 48.2 mm

D_a - max. - 64.8 mm

D_b - max. - 66.6 mm

r_a - max. - 0.6 mm

r_b - max. - 0.3 mm

d_n - 54.2 mm

Basic dynamic load rating - C - 13 kN

Basic static load rating - C₀ - 9.5 kN

Fatigue load limit - P_u - 0.4 kN

Limiting speed for grease lubrication - 19000 r/min

Limiting speed for oil lubrication - 32000 mm/min

Ball - D_w - 6.35 mm

Ball - z - 23

G_ref - 1.62 cm3

Calculation factor - f₀ - 10.5

Preload class A - G_A - 50 N

Preload class B - G_B - 100 N

Preload class C - G_C - 200 N

Preload class D - G_D - 400 N

Calculation factor - f - 1.11

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.04

Calculation factor - f_2C - 1.09

Calculation factor - f_2D - 1.15

Calculation factor - f_HC - 1

Preload class A - 40 N/micron

Preload class B - 53 N/micron

Preload class C - 73 N/micron

Preload class D - 103 N/micron

Mass bearing - 0.13 kg

Tags :  SKF , 45x68x12