248/1180 CAFA/W20 SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu 248/1180 CAFA/W20 SKF

d – 40 mm

D – 68 mm

B – 15 mm

d₁ – 49,2 mm

d₂ – 49,2 mm

D₂ – 61,02 mm

r_1,2 – min – 1 mm

r_3,4 – min – 0,3 mm

a – 20,2 mm

d_a – min – 44,6 mm

d_a – max – 48,7 mm

d_b – min – 44,6 mm

d_b – max – 48,7 mm

D_a – max – 63,4 mm

D_b – max – 66 mm

r_a – max – 1 mm

r_b – max – 0,3 mm

Basic dynamic load rating – C – 15,9 kN

Basic static load rating – C₀ – 10,4 kN

Fatigue load limit – P_u – 0,44 kN

Limiting speed for grease lubrication – 19.000 r/min

Ball – D_w – 7,938 mm

Ball – z – 18

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 – 100 N

Preload class B – G_B – 200 N

Preload class C – G_C – 400 N

Preload class D – G_D – 800 N

Calculation factor – f – 1,06

Calculation factor – f₁ – 0,99

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1,02

Calculation factor – f_2C – 1,05

Calculation factor – f_2D – 1,08

Calculation factor – f_HC – 1

Preload class A – 96 N/micron

Preload class B – 124 N/micron

Preload class C – 162 N/micron

Preload class D – 214 N/micron

Mass bearing – 0,193 kg

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