Three-row roller slewing ring has 3 seat-rings, upper orbit, nether orbit and radial orbit are separated individually, it makes the load of each row of the rollers can be /confirm/ied, so it can undertake all kinds of different load simultaneously and it's carrying capacity is the biggest among four models, one more thing, the axial & radial size is especially suitable for many heavy-duty machines which require bigger diameter such as Bucket-Wheel Excavator, Wheeled Crane, Shipyard Crane, heavy-duty Truck Crane and so on.
