Tower Crane Slew Ring

Tower crane jibs are designed to free slew when out of service to avoid high loadings being placed on the crane structure and foundations with risk of failure or collapse.

Tower crane slew ring.

The slew ring drives the rotational movement of the slewing unit jib counter jib cab and tower top. The tower crane use a single row four point contact ball elements slewing ring 01 series and double row ball slewing bearing dia. The base connects to the mast or tower which gives the tower crane its height. The crane counter weights are located closer to the tower when combined with the angled arm the luffing jib tower crane typically has a higher capacity then the hammerhead crane.

Potain builds more than 60 types of tower cranes to fit a wide variety of job sites. Unlike the hammerhead crane the diagonal arm can move in and out from vertical to a 30 degree angle. Of 1000mm 2000mm 1250mm 1064mm are both standard. Whether on large infrastructure high rise jobsites crowded urban areas or wide open sites they make it possible to hoist and distribute loads high and far.

Tower cranes are available with either fixed or slewing towers. Attached to the top of the mast is the slewing unit the gear and motor that allows the crane to rotate. On top of the slewing unit are three parts. It is divided into two types for slewing bearing.

Top slewing cranes are the large construction sites most strategic equipment for productivity. Powered by the slewing gear drive the slew ring is fixed to a ball track and is made up of several hundred precisely machined gear teeth. High capacity top slewing cranes on infrastructure jobs luffing jib cranes that construct supertall skyscrapers topless cranes reshaping our urban environment and hup self erecting cranes transforming residential construction. Tower cranes fast erecting cranes top slewing cranes mobile construction cranes tower cranes in action services solutions tower crane litronic licab crane cabin concrete technology conveyor belts concrete pumps mixing plants mixing systems control systems recycling plants technical center mixing trials construction machines for all situations.

On the fixed tower type the slewing ring is situated at or near the top of the tower and the jib slews about the vertical axle of the stationary tower.