71972 CDMA/P4A SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu tiếp xúc có độ chính xác cao 71972 CDMA/P4A SKF:

d – 17 mm

D – 30 mm

B – 7 mm

d₁ – 20.9 mm

d₂ – 20.9 mm

D₁ – 25.7 mm

r_1,2 – min. – 0.3 mm

r_3,4 – min. – 0.2 mm

a – 9 mm

d_a – min. – 19 mm

d_b – min. – 19 mm

D_a – max. – 28 mm

D_b – max. – 28.6 mm

r_a – max. – 0.3 mm

r_b – max. – 0.2 mm

d_n – 22.1 mm

Basic dynamic load rating – C – 4 kN

Basic static load rating – C₀ – 2 kN

Fatigue load limit – P_u – 0.085 kN

Limiting speed for grease lubrication – 45000 r/min

Limiting speed for oil lubrication – 67000 mm/min

Ball – D_w – 3.969 mm

Ball – z – 14

G_ref – 0.24 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 – 25 N

Preload class B – G_B – 50 N

Preload class C – G_C – 100 N

Preload class D – G_D – 200 N

Calculation factor – f – 1.05

Calculation factor – f₁ – 0.98

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1.04

Calculation factor – f_2C – 1.08

Calculation factor – f_2D – 1.14

Calculation factor – f_HC – 1

Preload class A – 42 N/micron

Preload class B – 54 N/micron

Preload class C – 70 N/micron

Preload class D – 93 N/micron

Mass bearing – 0.017 kg

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