Four-point Contact Ball Bearing
ESG Four point contact ball bearings are a kind of separating bearings. They can endure bilateral axial load. The raceway of inner ring and outer ring is peach shaped section. When there is no loading or only radial load, the steel balls and the rings arranging in four point contact. 
Boundary dimensions(mm) Designations Equivalent to foreign designations(For your information)
d D B Fw   SKF FAG NSK NTN KOYO TIMKEN URB
100 149.5 24 QJ1020X1
100 149.5 24 QJF1020X1
100 150 24 QJ1020
100 150 24 QJF1020
110 169.5 28 QJ1022X1
110 169.5 28 QJF1022X1
110 170 28 QJ1022
110 170 28 QJF1022
110 200 38 QJ222
110 200 38 QJF222

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