71940 CD/HCP4AH1 SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71940 CD/HCP4AH1 SKF:

d – 30 mm

D – 55 mm

B – 13 mm

d₁ – 37.7 mm

d₂ – 37.7 mm

D₁ – 47.3 mm

K – 0.5 mm

C₁ – 7.8 mm

r_1,2 – min. – 1 mm

r_3,4 – min. – 0.3 mm

a – 16.6 mm

d_a – min. – 34.6 mm

d_b – min. – 34.6 mm

D_a – max. – 50.4 mm

D_b – max. – 53 mm

r_a – max. – 1 mm

r_b – max. – 0.3 mm

d_n – 39.3 mm

Basic dynamic load rating – C – 13.8 kN

Basic static load rating – C₀ – 7.6 kN

Fatigue load limit – P_u – 0.325 kN

Limiting speed for grease lubrication – 28000 r/min

Limiting speed for oil lubrication – 43000 mm/min

Ball – D_w – 7.938 mm

Ball – z – 14

G_ref – 1.59 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 – 90 N

Preload class B – G_B – 180 N

Preload class C – G_C – 360 N

Preload class D – G_D – 720 N

Calculation factor – f – 1.06

Calculation factor – f₁ – 0.99

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.02

Calculation factor – f_2C – 1.05

Calculation factor – f_2D – 1.08

Calculation factor – f_HC – 1

Preload class A – 79 N/micron

Preload class B – 102 N/micron

Preload class C – 133 N/micron

Preload class D – 176 N/micron

Mass bearing – 0.112 kg

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