6909RS Ball Bearing 45mm x 68mm x 12mm Bearing 6909RS Ball Bearing 6909RS, the 6909RS bearings are made of Chrome Steel, 6909RS can rotate up to 5,500 rpm, 6909RS bearing has Rubber Seals to protect the bearing from dust or any possible contamination, 6909RS bearings are self lubricated bearings, 6909RS bearings are already greased.