71920 ACD/HCP4AH1 SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71920 ACD/HCP4AH1 SKF:

d – 50 mm

D – 90 mm

B – 20 mm

d₁ – 62.3 mm

d₂ – 62.3 mm

D₁ – 77.7 mm

r_1,2 – min. – 1.1 mm

r_3,4 – min. – 0.6 mm

a – 19.4 mm

d_a – min. – 57 mm

d_b – min. – 57 mm

D_a – max. – 83 mm

D_b – max. – 85.8 mm

r_a – max. – 1 mm

r_b – max. – 0.6 mm

d_n – 65.6 mm

Basic dynamic load rating – C – 44.9 kN

Basic static load rating – C₀ – 34 kN

Fatigue load limit – P_u – 1.4 kN

Limiting speed for grease lubrication – 16000 r/min

Limiting speed for oil lubrication – 26000 mm/min

Ball – D_w – 12.7 mm

Ball – z – 15

G_ref – 6.708 cm3

Calculation factor – f₀ – 14.5

Preload class A – G_A – 170 N

Preload class B – G_B – 340 N

Preload class C – G_C – 680 N

Preload class D – G_D – 1360 N

Calculation factor – f – 1.08

Calculation factor – f₁ – 1

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.01

Calculation factor – f_2C – 1.03

Calculation factor – f_2D – 1.05

Calculation factor – f_HC – 1

Preload class A – 65 N/micron

Preload class B – 88 N/micron

Preload class C – 124 N/micron

Preload class D – 178 N/micron

Mass bearing – 0.462 kg

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