Clamshell grab
manufacturer
India.
Twin-shell hydraulic grabs for free-flowing bulk materials. Suited to grain, coal, ore, sand and aggregates. Fabricated in structural steel with sealed hinge bearings and replaceable wear lips. Capacity 0.5 to 8 m³.
The standard
grab for free-flowing
bulk materials.
The clamshell grab is the correct tool wherever the material is granular, lump or free-flowing — grain, coal, ore, sand, aggregates, fertiliser and similar bulk commodities. The twin-shell geometry closes cleanly on granular material, retaining it with minimal spillage and achieving high volumetric efficiency per cycle.
Fluidline clamshell grabs are hydraulically actuated and designed to interface with the hydraulic circuit of the crane they are used with. Shells are fabricated in heavy structural steel with replaceable wear lip inserts at the cutting edge, extending service life without requiring shell replacement. Hinge bearings are sealed against material ingress for reliable long-term performance in dusty bulk handling environments.
We engineer clamshell grabs to your crane capacity, material density and required throughput. Shell geometry — opening radius, shell depth and cutting edge profile — is optimised for the specific material to maximise fill factor and minimise cycle time.
Engineering
specifications
at a glance.
| Capacity | 0.5 m³ to 8 m³ |
|---|---|
| Shell Configuration | Twin shell, hydraulically actuated |
| Operating Weight | 600 kg to 10,000 kg |
| Shell Material | Heavy structural steel (IS 2062 / equivalent) |
| Cutting Edge | Replaceable hardened wear lip inserts |
| Hinge Bearings | Sealed bearings, grease-nipple lubricated |
| Hydraulic Actuation | Double-acting hydraulic cylinder |
| Suitable Materials | Grain, coal, iron ore, sand, aggregate, fertiliser, salt |
| Crane Interface | As per customer crane specification |
| Surface Treatment | Shot-blasted, epoxy primer and industrial finish coat |
| Hose Set | High-pressure hose set supplied complete |
| Testing | Hydraulic pressure test at 1.5× working pressure before dispatch |
Designed for
high-cycle
bulk handling.
Replaceable Wear Lips
Hardened wear lip inserts at the cutting edge are bolted and replaceable without shell replacement. Significantly extends service life in abrasive bulk materials such as ore and aggregate.
Sealed Bearings
Hinge pin bearings are sealed against material ingress and fitted with grease nipples for periodic lubrication. Prevents premature bearing failure in dusty and wet operating environments.
Optimised Shell Geometry
Shell depth, opening radius and cutting edge profile are engineered for your specific material to maximise fill factor — the ratio of actual fill to rated capacity — reducing cycles per tonne.
Hydraulic or Rope Operation
Available in hydraulically actuated configuration for cranes with hydraulic circuits, or rope-operated configuration for wire rope cranes without hydraulic capability. Both types in our range.
Custom Crane Interface
Top beam and suspension geometry engineered to your crane's hook size, lifting arrangement and headroom clearance. We accommodate single hook, double hook and rope drum configurations.
Complete Assembly
Supplied complete with hose set, swivel joint and connection hardware. Hydraulic pressure tested before dispatch and accompanied by test certificate and dimensional report.
Hydraulic and
rope-operated
variants.
Hydraulic Clamshell
For cranes equipped with a hydraulic circuit. Double-acting cylinder provides positive opening and closing force, giving consistent performance across the full capacity range and faster cycle times compared to rope operation.
Request specificationRope-Operated Clamshell
For overhead cranes and gantries without a hydraulic circuit. Gravity-closed or spring-assisted configuration. Lower installed cost where the crane does not have a hydraulic power unit. Suitable for lighter-duty applications.
Request specificationGrain / Dust-Sealed
Enhanced sealing variant for fine materials such as grain, flour and fertiliser. Close-fitting shell profiles at the parting line and sealed hinge bearings minimise spillage and contamination. Suitable for food and agri-commodity handling.
Request specificationIndustries that
run clamshell
grabs daily.
Wherever free-flowing bulk material needs to be moved from stockpile to hopper, ship hold to conveyor, or yard to bin, a clamshell grab is the tool of choice. Key applications:
Why engineers
specify Fluidline grabs.
Material-Specific Engineering
Shell geometry is optimised for your material's bulk density and flowability. The result is a higher fill factor and fewer cycles per tonne — directly reducing operating cost and crane wear.
Spares in Stock
Cylinder seal kits, wear lip inserts and hinge pin sets are stocked for every grab we manufacture. You are never waiting weeks for a part that should be available the next day.
ISO-Certified Quality
Every clamshell grab is fabricated, assembled and hydraulic pressure tested under our ISO 9001:2015 quality management system. Test certificate accompanies every unit dispatched.
Frequently
asked questions.
Can I use a clamshell grab for irregular scrap?
What sealing options do you offer for grain dust applications?
What is your typical lead time for a clamshell grab?
Are spare parts readily available for your clamshell grabs?
Do you offer trial units or demonstrations?
What bulk materials are clamshell grabs suited to?
Specify a grab
for your material.
Share your material type and bulk density, crane capacity and required throughput. Our engineering team will size the shell geometry and capacity and revert with a technical proposal within 24 hours.