71952 ACD/P4A SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71952 ACD/P4A SKF:

d – 25 mm

D – 42 mm

B – 9 mm

d₁ – 30.6 mm

d₂ – 30.6 mm

D₁ – 36.4 mm

r_1,2 – min. – 0.3 mm

r_3,4 – min. – 0.2 mm

a – 12.4 mm

d_a – min. – 27 mm

d_b – min. – 27 mm

D_a – max. – 40 mm

D_b – max. – 40.6 mm

r_a – max. – 0.3 mm

r_b – max. – 0.2 mm

d_n – 31.8 mm

Basic dynamic load rating – C – 6.4 kN

Basic static load rating – C₀ – 3.8 kN

Fatigue load limit – P_u – 0.16 kN

Limiting speed for grease lubrication – 38000 r/min

Limiting speed for oil lubrication – 56000 mm/min

Ball – D_w – 4.762 mm

Ball – z – 18

G_ref – 0.54 cm3

Calculation factor – e – 0.68

Calculation factor – Y₂ – 0.87

Calculation factor – Y₀ – 0.38

Calculation factor – X₂ – 0.41

Calculation factor – Y₁ – 0.92

Calculation factor – Y₂ – 1.41

Calculation factor – Y₀ – 0.76

Calculation factor – X₂ – 0.67

Preload class A – G_A – 40 N

Preload class B – G_B – 80 N

Preload class C – G_C – 160 N

Preload class D – G_D – 320 N

Calculation factor – f – 1.07

Calculation factor – f₁ – 0.98

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.07

Calculation factor – f_2C – 1.12

Calculation factor – f_2D – 1.17

Calculation factor – f_HC – 1.04

Preload class A – 66 N/micron

Preload class B – 86 N/micron

Preload class C – 112 N/micron

Preload class D – 149 N/micron

Mass bearing – 0.039 kg

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