248/670 CAMA/W20 SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu 248/670 CAMA/W20 SKF

d – 50 mm

D – 90 mm

B – 20 mm

d₁ – 62,3 mm

d₂ – 62,3 mm

D₁ – 77,7 mm

r_1,2 – min – 1,1 mm

r_3,4 – min – 0,6 mm

a – 26,4 mm

d_a – min – 57 mm

d_b – min – 57 mm

D_a – max – 83 mm

D_b – max – 85,8 mm

r_a – max – 1 mm

r_b – max – 0,6 mm

d_n – 65,6 mm

Basic dynamic load rating – C – 42,3 kN

Basic static load rating – C₀ – 32,5 kN

Fatigue load limit – P_u – 1,4 kN

Limiting speed for grease lubrication – 16.000 r/min

Limiting speed for oil lubrication – 26.000 mm/min

Ball – D_w – 12,7 mm

Ball – z – 15

G_ref – 6,708 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 – 265 N

Preload class B – G_B – 530 N

Preload class C – G_C – 1060 N

Preload class D – G_D – 2120 N

Calculation factor – f – 1,08

Calculation factor – f₁ – 0,99

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1,01

Calculation factor – f_2C – 1,03

Calculation factor – f_2D – 1,06

Calculation factor – f_HC – 1,01

Preload class A – 171 N/micron

Preload class B – 223 N/micron

Preload class C – 295 N/micron

Preload class D – 398 N/micron

Mass bearing – 0,386 kg

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