1. Selection of frame type

        Common slewing ring classifies into four types: single-row ball, two-row ball,cross-rolling pole, three-row pole

        According to our experience and calculation, we have conclusion as follows:

• Bearing capacity of single-row ball slewing is more than cross-row pole with same figure dimension.
• Below 160 ton meters load of incline moment, adopts single-row ball slewing bearing can get higher quality & price rate than threw-row pole slewing bearing,that is principal selection.While when incline moment is longer than 160 tons meters, should consider three row pole slewing bearing.
  

        2.Selection of single-row slewing bearing series

        Domestically, at present single-row slewing bearing has specifications of 3 series:HS series and 01 series.
     
        New clients usually don’t know how to choose, we think each series has its own adantage, we analyze as bellows:


        Types and specifications of our Slewing Rings

　　Compare parameter of three series( take outer tooth with roll center diamter of 1250 as example)

Rotary is all the support needed between the two parts relative to bear the axial rotation and at the same time, and radial force and overturning moment of the machinery-based components. Its basic function is to be fixed bolts used in machinery and equipment of the upper and lower bearings, and a power-transmission, and machinery and equipment between the two parts of the relative rotation. Slewing bearings are generally installed with a hole in gear, or gear, lubrication and seal holes, a compact, light weight, structural steel and good, smooth operation and high precision, secure, reliable and so on.

Slewing bearings and bearing the same, with both rolling and rolling of the Ring Road, but it compared with the general Rolling, there are many differences, there are the following:

① rotary bearing the larger size, its diameter is usually in the 0.4-10 meters, and some as large as 40 meters in diameter.
② slewing bearings in general should bear several aspects of the load, not only have to bear axial force, the radial force, but also bear the larger overturning moment. Therefore, often supported from a rotating sets of ordinary Rolling role.
③ rotary bearing the functioning of the lower rate, usually 50 to / minutes. On many occasions, the rotary bearing no continuous operation, but only from the perspective of the rotation, or the so-called swing bearings.
④ in materials and manufacturing processes, such as heat treatment, slewing bearings and roller bearing a great difference.
⑤ Usually, slewing bearings on the drive with a rotation of the ring gear and dust with the seal.
⑥ installed in different ways, unlike ordinary slewing ring bearing in mind that sets installed in the shaft and bearing boxes, but will be fixed by screws in the upper and lower bearings on.

Rotary is supporting the basic machinery and equipment parts, the national economy in various sectors of the application of a very wide range, the products are widely used in engineering machinery, port machinery, metallurgical machinery, mining machinery, oil machinery, chemical machinery, medical equipment, shipbuilding, machinery, Light industrial machinery, environmental protection machinery, entertainment equipment, transport machinery and military equipment and other industries. Rotary is now supporting the increasing use of the energy conservation and environmental protection projects, such as wind turbine needs of a variety of sophisticated slewing bearings supporting.
Radius of the production companies, including single-volleyball, cross-roller, three rows column, dual-volleyball, double row ball, two-Rotary, the Yaogu-Kazakh Ceftiofur-eight categories were more than 1,500 kinds of specifications in support of the Rotary In the areas within the extensive use of.

Applications range

Company products are mainly for excavators, tower cranes, cars cranes and crawler cranes matching, also used in other construction machinery, engineering machinery, and port machinery, metallurgical machinery, and light industrial machinery, and other fields, over the years for the domestic construction machinery and The main construction machinery manufacturer Xugong, Yuchai, Sanyichonggong, in the re-Branch, Liugong, Ha workers, such as built-choice, and bulk exports to the United States, Canada, Japan, Italy, Southeast Asia, the Middle East and other countries and Region.

Rotary is all the support needed between the two relatively Rotary also bear axial force at the same time, radial force and overturning moment of the mass of the mechanical components. In addition to building machinery and construction machinery supporting, but also widely used in port machinery, metallurgical machinery, light industrial machinery, wind power and military equipment, etc.

Excavators	Tower crane	Truck Crane