Scrap grab
A Schrottgreifer (also spider , Polypgreifer , clamshell buckets or engl. Orange Peel grave) is a hydraulically, hydraulic electric, diesel-hydraulic or mechanical (cable) operated load-lifting means for moving scrap, stones or other loose goods such. B. also waste in waste incineration plants . Mostly these grabs are used on cranes or hydraulic booms, e.g. B. in garbage bunkers, harbor cranes, deck cranes on ships, mobile cranes or even larger excavators.
Electro-hydraulic drive : A hydraulic system is driven by an electric motor. The hydraulic system opens and closes the shells of the grapple. The gripper is controlled (open / close trays) via the cable for the power supply of the electric motor.
Diesel-hydraulic drive : A hydraulic system is driven by a built-in diesel engine. The gripper is controlled (open / close) by a radio remote control.
Grabs are mainly used for handling bulk goods in ports (loading and unloading of cargo ships).