Excavators are used to excavate materials and transport them to stockpiles. As one of the important construction machines, excavators improve project efficiency and save labor costs. BURVIK Bearing Group supplies custom and precision bearings to manufacturers of excavation machinery. At present, we mainly produce NN series. Double-row cylindrical rollers are composed of inner rings, outer rings, double-row cylindrical rollers and cages. This type of bearing is used at the front end of the spindle of CNC lathes and is the most important precision component of this type of lathe.