Grabs

Hydraulic grab is an equipment made with two valves with synchronized movements, they are actioned by one or more oleo-dynamic cylinders. Hydraulic hook is composed of a hook and one hydraulic piston only.

Body of these hydraulic equipment is made of S355. More used parts are made with a high yield strength material, such as hydraulic teeth for wood model POTB M or hydraulic grab’s hook model PGT.

They are divided into:

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Hydraulic grab comparison table

Compare Tecnobenne grabs by equipment type, industry sector and main technical specifications.

Model Equipment Type Industry Sector Specifications
POTB LL Log Grab (Light series) Green maintenance Opening: 820-1630 mm
POTB L Log Grab (Light series) Log and branch handling Opening: 790-1740 mm
POTB M Log Grab (Heavy series) Heavy-duty uses Opening: 1180-2170 mm
POTB H Log Grab (Heavy series) Chipper feeding Opening: 1190-1900 mm
POTB2 Forestry Grab (Double cyl.) Large loads Opening: 2350 mm
PMT Stone Grab Reefs and stone arrangement Capacity: 1100-4500 kg
PMC Compactor Grab Ballast maintenance Opening: 890-1030 mm
PRT Rail Grab Rail handling and laying Capacity: 4500-7000 kg
PRCT Recycling Grab Storage and disposal centers Capacity: 1000-2500 kg
PGT Hydraulic Hook Lifting Capacity: 3300 kg
PTT2 Railway Grab Sleeper gripping, single/multiple -
PTL Brick Grab Logistics and site (bricks) Capacity: 2000-3000 kg
PFL Recycling Grab Recovery of appliances (WEEE) Capacity: 500-2000 kg

Our grabs are mounted on truck or fixed cranes, forestry cranes, on mini telescopic articulated loaders, on wheels or crawler excavators, self-propelled excavators. They are projected for the machines where they will be installed on with special attention to excavator weight or the lifting capacity at the boom of the crane arm.

Tecnobenne offers hydraulic log grabs with all kinds of optionals to satisfy customer’s needs.

Acccessories

Accessories that we can provide with our hydraulic log grabs are:

  • Bushing to be welded: adapter to weld at the top of the equipment to receive a rotator with shaft.
  • Flanged bushing: adapter to screw at the top of the equipment to receive a rotator with shaft.
  • Hydraulic rotator: it’s mounted on the body, it permits an hydraulic 360 ° rotation. An hydraulic rotator could be with shaft or flange.
  • Mechanical rotator: it’s mounted on the body, it allows a manual rotation of 250 °. You can find mechanical rotators with shaft or flanged.
  • Turntable bearings rotor: hydraulic rotor with turntable bearings  rotation of 360°.
  • Check control valve: it’s used to prevent that an equipment loses its load in case of breakage of hydraulic hoses.
  • Max valve: it regulates the oil pressure in pipes. It’s usually mounted on the machine, not on the equipment.
  • Suspension link: it’s very important to use it because it swings the grab through a classic cross movement so the machine doesn’t relieve tension directly on the equipment.
  • Custom-made link:  a particular link to satisfy our customer needs.

 

Discover our grabs models

Pinza per escavatori POTB2

Grab POTB 2

Hydraulic grab with blade and two horizontal cylinders.

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Pinza PRCT chiusa

Grab PRCT

Grab for glass bell-shaped containers.

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Pinza POTB LL chiusa

Grab POTB LL

Grab for logs handling.

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Pinza PGT chiusa

Grab PGT

Grab for lifting.

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Pinza idraulica PFL chiusa

PFL grab

Grab for household appliances recycling.

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Pinza idraulica PTL chiusa

Grab PTL

Brick stack grapple.

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Pinza PRT chiusa

Grab PRT

Grab for railway maintenance.

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Pinza PTT2 chiusa

Grab PTT2

Grab for railway field.

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Pinza PMC chiusa

Grab PMC

Grab for railway maintenance.

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Pinza PMT chiusa

Grab PMT

Log grab for rocks loading and unloading.

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Pinza POTB H chiusa

Log grab POTB H

Grab for logs without blade.

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Pinza POTB M chiusa

Log grab POTB M

Grab for logs, heavy version.

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Pinza POTB L chiusa

Log grab POTB L

Log grab for brush woods and wood.

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Frequently Asked Questions about Hydraulic Demolition Grabs

Learn more about hydraulic demolition grabs, their applications, suitable materials and how to choose the right attachment.

What is the difference between a hydraulic grab and a hydraulic hook?

Although both are gripping tools, the difference lies in the structure and the number of shells:

Hydraulic Grab: Equipped with 2 shells with synchronized movement driven by one or more cylinders. It is ideal for grasping and tightening objects like logs or boulders.

Hydraulic Hook: Composed of a single mobile hook driven by a piston. It is more specific equipment for lifting and pulling (e.g., model PGT).

What materials are used to ensure the resistance of the grabs?

Safety and durability are guaranteed by the use of certified materials:

Body: Made of S355 steel, the reference standard for heavy carpentry.

High-stress zones: Parts subjected to tension and yielding (like the shells of the POTB M model) are built with special high-strength steels to prevent deformation under load.

What are the types of grabs available and their uses?

Tecnobenne designs tailor-made solutions for different operational sectors:

Forestry Sector: Grabs for handling logs and timber.

Aggregates Handling: Specific grabs for boulders and reef stones.

Railway Maintenance: Dedicated equipment for laying tracks and sleepers.

Construction and Logistics: Grabs for brick packs and site materials.

Recycling: Special models for the recovery of household appliances and WEEE.

On which machines can these tools be installed?

Our grabs are compatible with a wide range of operating machines:

Truck cranes and forestry loaders.

Wheeled, tracked, and self-propelled excavators.

Articulated telescopic mini loaders and fixed installations.

Technical Note: Preparation is carried out following rigorous technical tables that relate the weight of the grab to the arm's capacity or the excavator's weight.

Why is the suspension link considered an indispensable accessory?

The suspension link allows the grab to perform the cross-movement (oscillation). This is fundamental because it allows the equipment to self-align with the load, preventing stress and mechanical torsion from discharging directly onto the machine arm, preserving its structure over time.

How can I manage load rotation?

We offer three different solutions depending on operational needs:

Hydraulic Rotator: Allows continuous 360° rotation controlled directly from the cabin.

Mechanical Rotator: Ideal for manual positioning, with an action radius of 250°.

Slewing Rotator: A high-resistance solution for heavy loads, with slewing hydraulic rotation.

What happens in case of hydraulic hose breakage?

To ensure maximum safety at work, a check valve can be installed. This component prevents the grab from opening accidentally and losing the load in case of a sudden drop in pressure or pipe breakage.