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Clamshell grab
Clamshell grab
  • Balanced design Very stable shell construction
  • Optimal symmetrical closing because of tooth segments
  • Low-friction cable guide with guide wheels for extremely long life span of the closing cable
  • Round knife edges to avoid damage to ship

Under all circumstances, Nemag guarantees a high level of productivity, long life span and low costs for maintenance for handling bulk materials. For a reliable and fast handling of many different bulk goods, Nemag developed the Clamshell grab. This grab enables you to ship practically every kind of bulk material, as long as it isn’t too coarse: coal, ore, minerals, biomass, concentrates, fertilizer, bauxite and phosphates.

The Nemag Clamshell grabs stand out thanks to their excellent digging and filling capabilities and extremely fast emptying capabilities. Especially during the free digging phase of unloading, the Nemag Clamshell grab performs extremely favourably. With its extremely efficient design, the Clamshell grab combines a favourable distribution of forces in the construction with the advantages of easy operation. The Nemag Clamshell grab is very lightweight, making it highly productive.

In order to be able to process many different kinds of material, the Clamshell grabs are available with every possible kind of opening direction and with diverse rope positions: longitudinal, transversal and diagonally in relation to the crane. At Nemag, we listen to client’s requirements and will make our products to meet your needs. To combat the emission of dust, the Clamshell grab can also be fitted with closed shells. In addition, we ensure that the lip plate type is suitable for the nature of the material.


The grabs are manufactured from the highest possible quality steels, such as Dillidur 400, Hardox 400, Dillimax 690 and Weldox 700 or equally renowned brands. The clamshell grab’s closing rope guide can be equipped with low friction cable guides, which guarantee a long life span of the closing cables. Standard equipped with low friction pivots, which combine a high lifting power with light and low friction opening and closing of the grab. At your request, we can offer central lubrication.

The added value of the clamshell grab

  • High free digging productivity
  • Lightweight
  • Specifically suited for handling powdery and dusty material
  • Long life span of closing cables
  • Minimal maintenance costs per ton of handled material
  • Environmental-friendly design

Characteristics and advantages

The Clamshell grab is available for lifting capacities of over 85 tons and volumes of over 60 m3. Practically every kind of bulk material can be handled providing it is not too coarse. The shells are available in open, half closed and closed versions and with every kind of possible opening direction and with diverse cable patterns. The robust design of the Clamshell grab is manufactured with high-tensile steel. It is lightweight, with excellent filling and digging and fast emptying capabilities. Its also is equipped with excellent cable guides.