708 ACE/HCP4AH SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 708 ACE/HCP4AH SKF:

d – 50 mm

D – 72 mm

B – 12 mm

d₁ – 56.7 mm

d₂ – 54.9 mm

D₁ – 65.3 mm

K – 0.5 mm

C₁ – 3.53 mm

r_1,2 – min. – 0.6 mm

r_3,4 – min. – 0.3 mm

a – 21.2 mm

d_a – min. – 53.2 mm

d_b – min. – 52 mm

D_a – max. – 68.8 mm

D_b – max. – 70 mm

r_a – max. – 0.6 mm

r_b – max. – 0.3 mm

d_n – 58.4 mm

Basic dynamic load rating – C – 12.1 kN

Basic static load rating – C₀ – 8.2 kN

Fatigue load limit – P_u – 0.345 kN

Limiting speed for grease lubrication – 23000 r/min

Limiting speed for oil lubrication – 36000 mm/min

Ball – D_w – 7.144 mm

Ball – z – 21

G_ref – 1.7 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 – 110 N

Preload class B – G_B – 330 N

Preload class C – G_C – 660 N

Calculation factor – f – 1.15

Calculation factor – f₁ – 0.99

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.04

Calculation factor – f_2C – 1.07

Calculation factor – f_HC – 1

Preload class A – 96 N/micron

Preload class B – 145 N/micron

Preload class C – 190 N/micron

Mass bearing – 0.13 kg

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