71918 ACD/P4A SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71918 ACD/P4A SKF:

d – 120 mm

D – 180 mm

B – 28 mm

d₁ – 138.5 mm

d₂ – 138.5 mm

D₁ – 161.5 mm

K – 0.5 mm

C₁ – 7.41 mm

r_1,2 – min. – 2 mm

r_3,4 – min. – 1 mm

a – 34.2 mm

d_a – min. – 129 mm

d_b – min. – 129 mm

D_a – max. – 171 mm

D_b – max. – 175 mm

r_a – max. – 2 mm

r_b – max. – 1 mm

d_n – 142.6 mm

Basic dynamic load rating – C – 114 kN

Basic static load rating – C₀ – 122 kN

Fatigue load limit – P_u – 4.2 kN

Limiting speed for grease lubrication – 8500 r/min

Limiting speed for oil lubrication – 13000 mm/min

Ball – D_w – 19.05 mm

Ball – z – 22

G_ref – 27 cm3

Calculation factor – f₀ – 15.7

Preload class A – G_A – 430 N

Preload class B – G_B – 860 N

Preload class C – G_C – 1720 N

Preload class D – G_D – 3440 N

Calculation factor – f – 1.17

Calculation factor – f₁ – 1

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.02

Calculation factor – f_2C – 1.05

Calculation factor – f_2D – 1.09

Calculation factor – f_HC – 1.02

Preload class A – 146 N/micron

Preload class B – 198 N/micron

Preload class C – 278 N/micron

Preload class D – 404 N/micron

Mass bearing – 1.756 kg

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