Slewing bearings are widely used in construction machinery, such as tower cranes, excavators, mobile cranes, truck-mounted concrete pumps, etc. Rothe erde slewing bearing products accompany such machines all over the world, the important things is that with the rapid development of India economy, which lead to a strong demand of various kinds of construction machinery. Rothe erde slewing bearings can totally meet the need. Any questions about your this kind of slewing bearing, please contact us, we'd like to discuss it with you. Designation: 1.Standard series KD 210 (single-row ball slewing rings) Standard bearing type 21, standard number of bolt holes (1) without gear (2) with external gear (3) with internal gear Standard bearing type 21, double number of bolt holes (1) without gear (2) with external gear (3) with internal gear Standard bearing type 21, Bearing with limited clearance (1) without gear (2) with external gear (3) with internal gear Standard bearing type 110, standard bearing (1) without gear (2) with external gear (3) with internal gear Standard bearing type 110, Bearing with limited clearance (1) without gear (2) with external gear (3) with internal gear 2. Standard series KD 320 (Double-row ball slewing rings) Bearing with external gear Bearing with internal gear 3. Standard series KD 600 (Four-point contact ball slewing rings) Bearing without gear Bearing with external gear Bearing with internal gear Standard bearing type 621, standard bearing (1) Without gear (2) With external gear (3) With internal gear Standard bearing type 621, Bearing with limited clearance (1) Without gear (2) With external gear (3) With internal gear Standard bearing type 625, standard bearing (1) Without gear (2) With external gear (3) With internal gear Standard bearing type 625, Bearing with limited clearance (1) Without gear (2) With external gear (3) With internal gear 4. Standard series RD 700 (Ball and roller slewing rings) Bearing with external gear 5. Standard series RD 800 (Cross roller slewing rings) Bearing with external gear Bearing with internal gear 6. Standard series RD 900 (Triple-row roller slewing rings) Bearing with external gear Bearing with internal gear -