... 1. Self-aligning ball bearing has two rows of balls and a common concave sphered raceway in the outer ring. The bearing ... . Product brand: Sweden SKF, Japan NSK3. Applications: Widely used in machinery of mining, power, and textile etc. 4. Bearing Designation ... of effort and hard work, our products are currently used in metallurgy, power, petrochemical, railway, steel, cement, construction machinery ...