Crane Slew Ring

This includes ball bearings for low and medium loads as well as roller bearings for medium to high load applications.

Crane slew ring. Of 1000mm 2000mm 1250mm 1064mm are both standard. The importance of maintaining large slewing ring bearings in lifting equipment adobe pdf. Kobelco crane excavators slewing rings 010 25 450 nongeared nbr seals steel material 543 357 70mm single row four point contact ball slewing bearing revolving floating crane construction ship gantry crane slewing bearing. In this article from crane and rigging hot line bearing remanufacturing manager ronald shaw describes the importance of scheduled raceway lubrication torque checks on bolts and gear lubrication.

Slewing bearing rocking test xzwd. A crane s critical connection. The broad base this gives to the slewing section above allows it to slew whilst carrying extremely heavy loads. This measures the play or relative movement between the inner and outer bearing race to give an indication of the wear taking place.

The tower crane use a single row four point contact ball elements slewing ring 01 series and double row ball slewing bearing dia. A ring crane is a form of large construction crane with a luffing jib it is distinguished by its slew pivot being in the form of a ring shaped track rather than a narrow central spindle. Similar in size to the rk series kaydon s hs series slewing ring bearings have rectangular cross sections that provide approximately twice the load capacity moment ratings up to 139 900 ft lbs in the same envelope hs series bearings provide a wide variety of solutions for medium to heavy duty applications. Crane slewing bearing is importance maintenance due to have a complex load spectrum the slewing ring bearing can simultaneously handle all combinations of thrust radial and tilting moment loading.

A slewing bearing or slew ing ring is a rotational rolling element bearing that typically supports a heavy but slow turning or slow oscillating load often a horizontal platform such as a conventional crane a swing yarder or the wind facing platform of a horizontal axis windmill. Rocking test is a test which is carried out to find wear down of the slewing bearing of the deck crane on ships. Liebherr manufactures customer and application specific large diameter bearing slewing rings. Tower crane plays an important role in the construction machinery industry and it is also commonly used in people s daily life which seems irrevocable tendency.

Kaydon slewing bearings hs series. Slewing bearings comprise an inner ring and an outer ring one of which usually incorporates a gear.