Crane grab

Types of Crane Grab and Their Features

Single-Rope Grab

• Mechanism: Operates with one wire rope to perform both lifting and opening/closing actions, utilizing a special locking mechanism.
• Features: Suitable for cranes with a single lifting drum (single-hook), allowing seamless opening and closing during loading and unloading. Easy to attach and detach, making it suitable for underwater and land-based operations such as grabbing and stacking.
• Limitations: Cannot open in mid-air, except for hand-pull or remote-controlled types.

Double-Rope Grab

• Mechanism: Designed for cranes with dual lifting mechanisms (single rope for each drum). It uses one rope for balance and the other for opening and closing the grab.
• Features:
  • Often used in ports, docks, and construction industries.
  • Available in light, medium, heavy, and ultra-heavy configurations based on material properties.
  • Designed for handling loose, bulk materials.

Four-Rope Grab

• Mechanism: Used with cranes equipped with two sets of wire rope drums. It employs two ropes for support and two for opening and closing the jaws.
• Applications: Suitable for tasks like loading, unloading, stacking, and feeding materials. Often used with bridge or gantry cranes.
• Customization: Can be tailored with teeth, parallel beams, or for underwater operations based on user needs and material characteristics.

Multi-Claw Grab

• Applications: Efficiently handles scrap metal, large solid materials, and waste in challenging environments such as ports, railways, metallurgy, and construction.
• Features:
  • Available in single-rope, double-rope, four-rope, and electric models.
  • The jaws close individually based on material size and shape, ensuring effective handling.
  • Designed with 4 to 8 jaws, customizable based on user requirements and material properties.

Log Grab

• Applications: Specifically designed for handling timber in lumberyards, large woodworking factories, paper mills, and ports. Used for unloading ships, stacking logs, and other related tasks.
• Features:
  • Available in single-rope, double-rope, four-rope, and electric models.
  • Customizable to meet specific user needs.

Motorized Grab

• Mechanism: Equipped with its own opening/closing mechanism, allowing operation at any height for handling materials.
• Features:
  • Higher productivity compared to single-rope grabs.
  • Easy attachment and detachment with high loading/unloading efficiency.
  • Suitable for handling loose bulk materials.
  • Requires an energy supply cable reel for higher lifting heights.
• Limitation: Not suitable for underwater operations.

Electric Hydraulic Multi-Claw Grab

• Applications: Designed for handling irregular and large materials like scrap steel, pig iron, ore, and waste in harsh environments, effectively replacing manual labor.
• Features:
  • Equipped with an independent hydraulic system, using high-quality components for excellent performance.
  • Each jaw is driven by a separate hydraulic cylinder, ensuring no material spillage.
  • Includes a cable connector on the top for easy crane integration.
  • Available in multiple configurations: circular or rectangular jaws, and closed, semi-open, or open claw designs.