71921 ACD/HCP4AL SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71921 ACD/HCP4AL SKF:

d – 70 mm

D – 110 mm

B – 20 mm

d₁ – 84.3 mm

d₂ – 81.6 mm

D₁ – 95.32 mm

b – 1.9 mm

C₁ – 10.9 mm

C₂ – 3.4 mm

C₃ – 3.4 mm

r_1,2 – min. – 1.1 mm

r_3,4 – min. – 0.6 mm

a – 22.2 mm

d_a – min. – 76 mm

d_b – min. – 76 mm

D_a – max. – 104 mm

D_b – max. – 105.8 mm

r_a – max. – 1 mm

r_b – max. – 0.6 mm

d_n – 86.5 mm

Basic dynamic load rating – C – 23.8 kN

Basic static load rating – C₀ – 18.3 kN

Fatigue load limit – P_u – 0.78 kN

Limiting speed for grease lubrication – 17000 r/min

Limiting speed for oil lubrication – 27000 mm/min

Ball – D_w – 9.525 mm

Ball – z – 25

G_ref – 8.2 cm3

Calculation factor – f₀ – 8.4

Preload class A – G_A – 130 N

Preload class B – G_B – 380 N

Preload class C – G_C – 760 N

Calculation factor – f – 1.09

Calculation factor – f₁ – 1

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.03

Calculation factor – f_2C – 1.05

Calculation factor – f_HC – 1

Preload class A – 57 N/micron

Preload class B – 88 N/micron

Preload class C – 120 N/micron

Mass bearing – 0.61 kg

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