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Bearing 7028 CD/HCP4A (SKF)

Angular contact ball bearings, super-precision 7028 CD/HCP4A

Bearing number : 7028 CD/HCP4A

Size (mm) : 140x210x33

Brand : SKF

Bore Diameter (mm) : 140

Outer Diameter (mm) : 210

Width (mm) : 33

Bearing dimensions and specification in SKF catalogue:

d - 140 mm

D - 210 mm

B - 33 mm

d₁ - 161.6 mm

d₂ - 161.6 mm

D₁ - 188.4 mm

r_1,2 - min. - 2 mm

r_3,4 - min. - 1 mm

a - 40.1 mm

d_a - min. - 149 mm

d_b - min. - 149 mm

D_a - max. - 201 mm

D_b - max. - 205 mm

r_a - max. - 2 mm

r_b - max. - 1 mm

d_n - 166.3 mm

Basic dynamic load rating - C - 153 kN

Basic static load rating - C₀ - 166 kN

Fatigue load limit - P_u - 5.3 kN

Limiting speed for grease lubrication - 7500 r/min

Limiting speed for oil lubrication - 12000 mm/min

Ball - D_w - 22.225 mm

Ball - z - 22

G_ref - 45 cm3

Calculation factor - f₀ - 15.8

Preload class A - G_A - 570 N

Preload class B - G_B - 1140 N

Preload class C - G_C - 2280 N

Preload class D - G_D - 4560 N

Calculation factor - f - 1.16

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.02

Calculation factor - f_2C - 1.05

Calculation factor - f_2D - 1.09

Calculation factor - f_HC - 1.02

Preload class A - 168 N/micron

Preload class B - 228 N/micron

Preload class C - 320 N/micron

Preload class D - 464 N/micron

Mass bearing - 2.827 kg

Tags :  SKF , 140x210x33