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Bearing 71948 CD/P4A (SKF)

Angular contact ball bearings, super-precision 71948 CD/P4A

Bearing number : 71948 CD/P4A

Size (mm) : 240x320x38

Brand : SKF

Bore Diameter (mm) : 240

Outer Diameter (mm) : 320

Width (mm) : 38

Bearing dimensions and specification in SKF catalogue:

d - 240 mm

D - 320 mm

B - 38 mm

d₁ - 264.7 mm

d₂ - 264.7 mm

D₁ - 295.3 mm

r_1,2 - min. - 2.1 mm

r_3,4 - min. - 1 mm

a - 56.6 mm

d_a - min. - 251 mm

d_b - min. - 251 mm

D_a - max. - 309 mm

D_b - max. - 315 mm

r_a - max. - 2 mm

r_b - max. - 1 mm

d_n - 271.4 mm

Basic dynamic load rating - C - 229 kN

Basic static load rating - C₀ - 325 kN

Fatigue load limit - P_u - 8.2 kN

Limiting speed for grease lubrication - 3800 r/min

Limiting speed for oil lubrication - 5600 mm/min

Ball - D_w - 25.4 mm

Ball - z - 31

G_ref - 93 cm3

Calculation factor - f₀ - 16.7

Preload class A - G_A - 860 N

Preload class B - G_B - 1720 N

Preload class C - G_C - 3440 N

Preload class D - G_D - 6880 N

Calculation factor - f - 1.32

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 - 237 N/micron

Preload class B - 325 N/micron

Preload class C - 461 N/micron

Preload class D - 678 N/micron

Mass bearing - 8.5 kg

Tags :  SKF , 240x320x38