238/1180 CAFA/W20 SKF

Kích thước và Thông số kỹ thuật của Vòng bi cầu 238/1180 CAFA/W20 SKF

d – 220 mm

D – 340 mm

B – 56 mm

d₁ – 257 mm

d₂ – 257 mm

D₁ – 303 mm

r_1,2 – min – 3 mm

r_3,4 – min – 1,5 mm

a – 65,7 mm

d_a – min – 233 mm

d_b – min – 233 mm

D_a – max – 327 mm

D_b – max – 334 mm

r_a – max – 2,5 mm

r_b – max – 1,5 mm

d_n – 267,1 mm

Basic dynamic load rating – C – 338 kN

Basic static load rating – C₀ – 455 kN

Fatigue load limit – P_u – 11,6 kN

Limiting speed for grease lubrication – 4.000 r/min

Limiting speed for oil lubrication – 6.000 mm/min

Ball – D_w – 38,1 mm

Ball – z – 21

G_ref – 201 cm3

Calculation factor – f₀ – 15,6

Preload class A – G_A – 1250 N

Preload class B – G_B – 2500 N

Preload class C – G_C – 5.000 N

Preload class D – G_D – 10.000 N

Calculation factor – f – 1,13

Calculation factor – f₁ – 1

Calculation factor – f_2A – 1

Calculation factor – f_2B – 1,02

Calculation factor – f_2C – 1,05

Calculation factor – f_2D – 1,09

Calculation factor – f_HC – 1

Preload class A – 222 N/micron

Preload class B – 300 N/micron

Preload class C – 415 N/micron

Preload class D – 592 N/micron

Mass bearing – 16,068 kg

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