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Bearing 7209 CD/P4A (SKF)

Angular contact ball bearings, super-precision 7209 CD/P4A

Bearing number : 7209 CD/P4A

Size (mm) : 45x85x19

Brand : SKF

Bore Diameter (mm) : 45

Outer Diameter (mm) : 85

Width (mm) : 19

Bearing dimensions and specification in SKF catalogue:

d - 45 mm

D - 85 mm

B - 19 mm

d₁ - 57.3 mm

d₂ - 57.3 mm

D₁ - 72.7 mm

r_1,2 - min. - 1.1 mm

r_3,4 - min. - 0.6 mm

a - 18.3 mm

d_a - min. - 52 mm

d_b - min. - 52 mm

D_a - max. - 78 mm

D_b - max. - 80.8 mm

r_a - max. - 1 mm

r_b - max. - 0.6 mm

d_n - 60.6 mm

Basic dynamic load rating - C - 42.3 kN

Basic static load rating - C₀ - 31 kN

Fatigue load limit - P_u - 1.3 kN

Limiting speed for grease lubrication - 17000 r/min

Limiting speed for oil lubrication - 28000 mm/min

Ball - D_w - 12.7 mm

Ball - z - 14

G_ref - 5.922 cm3

Calculation factor - f₀ - 14.2

Preload class A - G_A - 160 N

Preload class B - G_B - 320 N

Preload class C - G_C - 640 N

Preload class D - G_D - 1280 N

Calculation factor - f - 1.07

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.01

Calculation factor - f_2C - 1.03

Calculation factor - f_2D - 1.05

Calculation factor - f_HC - 1

Preload class A - 61 N/micron

Preload class B - 82 N/micron

Preload class C - 115 N/micron

Preload class D - 166 N/micron

Mass bearing - 0.41 kg

Tags :  SKF , 45x85x19