7009 ACE/P4A SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 7009 ACE/P4A SKF:

d – 55 mm

D – 90 mm

B – 18 mm

d₁ – 68.18 mm

d₂ – 66.65 mm

D₂ – 79.39 mm

b – 2.2 mm

C₁ – 9 mm

C₂ – 4.3 mm

C₃ – 2.8 mm

r_1,2 – min. – 1.1 mm

r_3,4 – min. – 0.6 mm

a – 26 mm

d_a – min. – 61 mm

d_b – min. – 61 mm

D_a – max. – 84 mm

D_b – max. – 86.8 mm

r_a – max. – 1 mm

r_b – max. – 0.6 mm

d_n – 69.2 mm

Basic dynamic load rating – C – 13.3 kN

Basic static load rating – C₀ – 10.4 kN

Fatigue load limit – P_u – 0.44 kN

Limiting speed for grease lubrication – 19000 r/min

Limiting speed for oil lubrication – 30000 mm/min

Ball – D_w – 6.747 mm

Ball – z – 26

G_ref – 4.69 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 – 78 N

Preload class B – G_B – 155 N

Preload class C – G_C – 470 N

Calculation factor – f – 1.06

Calculation factor – f₁ – 0.99

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.01

Calculation factor – f_2C – 1.04

Calculation factor – f_HC – 1

Preload class A – 100 N/micron

Preload class B – 128 N/micron

Preload class C – 194 N/micron

Mass bearing – 0.42 kg

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