Grab

A grab is a specialized load-handling device designed for loading, unloading, and transporting bulk materials. The grab consists of a bucket with movable jaws forming a container for the handled material. The closing and opening of the jaws is performed using ropes (or hydraulic cylinders): during loading, the jaws close within the material pile, and during unloading, they open while suspended. Grabs are widely used in metallurgy, power generation, ports, raw material warehouses, processing plants, and heavy industry facilities.

“Gruzopodyem” manufactures grabs for overhead, gantry, and jib cranes with lifting capacities ranging from 2.0 to 32.0 tons. The equipment is designed in accordance with TU 28.22.20.000-022-87879481-2026, complying with the requirements of electrical installation regulations, GOST 24599-87, GOST 33715-2015, and Technical Regulation of the Customs Union TR CU 010/2011 “On the Safety of Machinery and Equipment.” Equipment selection is carried out individually based on technical specifications and operating conditions.

The equipment is intended for operation at ambient temperatures from -40 °C to +40 °C. Upon individual request, grabs can be manufactured for operation within an extended temperature range from -60 °C to +80 °C. Grabs are produced in climatic versions U, UHL, T, and M with placement categories 1 and 2 in accordance with GOST 15150-69.

According to the design type, grabs are divided into detachable and non-detachable models.
Detachable grabs are suspended from the crane hook and equipped with an integrated drive: electric motor, hydraulic system, or automatic closing mechanism for single-rope grabs.
Non-detachable grabs are part of the crane equipment and are directly connected by ropes to the crane hoisting winches.

Thus, according to the design type and depending on the required application, the following grab models are distinguished:

• rope grabs (non-detachable)
• suspended (detachable) rope grabs
• suspended (detachable) motorized grabs
• suspended (detachable) hydraulic grabs

Grabs are also classified according to the type of handled material, structural design, and operating conditions.

Depending on the design and application, two-jaw, multi-jaw, and tong-type grabs are used. According to the number of ropes, grabs are classified as single-rope, double-rope, three-rope, and four-rope types. For two-jaw four-rope grabs, longitudinal and transverse jaw opening relative to the crane ropes are also distinguished.

The grab design may provide operation with various types of cargo and loading conditions, including unloading railway wagons, ship holds, and other technological areas. Depending on the handled material, the grab structure may differ according to the following criteria:

• by digging method: standard and underwater grabs are distinguished;
• by jaw movement trajectory: digging and gathering grabs are distinguished. In digging grabs, the jaws penetrate into the material during gripping, ensuring efficient handling of dense and compacted cargoes. Gathering grabs move the jaws along a trajectory close to a horizontal plane, allowing efficient handling of materials spread in a thin layer.

The warranty period is 12 months from the date of commissioning, but no more than 18 months from the manufacturing date, provided that operating conditions and the standard operating life of the equipment are observed.

Our company has been carrying out the full production cycle of lifting and transport equipment since 2008. We design, manufacture, deliver, install, and provide further service maintenance for our products. Strict quality control is implemented at the завод, including the operation of 3 accredited quality laboratories.