Rks series slewing bearing 1. Rks-four point contact ball slewing ring bearing-external gear 2. Rks-four point contact ball slewing ring bearing- internal gear 3. Rks-four point contact ball slewing ring bearing- without gear 4. Rks-cross roller slewing ring bearing-external gear 5. Rks-cross roller slewing ring bearing- internal gear 6. Rks-cross roller slewing ring bearing- without gear 7. Rks-l-shape slewing ring bearing-external gear 8. Rks-l-shape slewing ring bearing- internal gear 9. Rks-l-shape slewing ring bearing- without gear 10. Rks-other slewing ring bearing designation listz