S7020 CD/HCP4A SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao S7020 CD/HCP4A SKF:

d – 25 mm

D – 47 mm

B – 12 mm

d₁ – 32.1 mm

d₂ – 32.1 mm

D₁ – 39.9 mm

r_1,2 – min. – 0.6 mm

r_3,4 – min. – 0.3 mm

a – 14.5 mm

d_a – min. – 28.2 mm

d_b – min. – 28.2 mm

D_a – max. – 43.8 mm

D_b – max. – 45 mm

r_a – max. – 0.6 mm

r_b – max. – 0.3 mm

d_n – 33.4 mm

Basic dynamic load rating – C – 9.2 kN

Basic static load rating – C₀ – 5 kN

Fatigue load limit – P_u – 0.212 kN

Limiting speed for grease lubrication – 34000 r/min

Limiting speed for oil lubrication – 50000 mm/min

Ball – D_w – 6.35 mm

Ball – z – 14

G_ref – 1.02 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 – 60 N

Preload class B – G_B – 120 N

Preload class C – G_C – 240 N

Preload class D – G_D – 480 N

Calculation factor – f – 1.05

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 – 64 N/micron

Preload class B – 83 N/micron

Preload class C – 108 N/micron

Preload class D – 143 N/micron

Mass bearing – 0.079 kg

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