(1 Ball+1 sleeve a single ball bearing is the improvement of traditional oil bearing, sliding friction and rolling friction mixed, in fact, Slewing bearing is to use a ball bearing paired with an oily bearings to reduce the cost of double ball bearing, it between the rotor and the stator with ball for lubrication, and with lubricating oil. It overcomes the problem that the life of the oil bearing is short, the operation is unstable, and the cost is very limited.
Single ball bearing to absorb oil bearing and double ball bearing has the advantages and the bearing service life of up to 40000 hours, the disadvantage is in after entering into the ball, and the running noise is increased, insert ball bearing but still less than the double ball bearing.
