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Today’s high-speed grab (clamshell) unloaders feature short duty-cycles and large capacity grabs for greater unloading volume and efficiency.


  • Rail mounted, grab unloaders position themselves to facilitate unloading practices.
  • Stationary mounted grabs require a barge/ship positioning system.
  • Ergonomically designed operator’ cabs employ latest technology graphic controls.
  • Semi-automatic rope and bucket control enhance unloading efficiency.


  • Fast and safe bulk vessel unloading.
  • Automated controls ease operator fatigue.
  • Accommodate all types and sizes of bulk vessels.
  • Today’s grab unloaders offer onboard controls and troubleshooting.

How it works

A clamshell bucket, typically controlled by winches and wire rope, digs and hoists bulk materials from the transport vessel, lifting and discharging it into an onboard hopper . As this process is repeated, various types of feeders at the hopper discharge load the material onto a conveyor for transporting to its destination or transfer point.

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