The wire cutting shear is a central cutting tool on construction sites, in demolition, and in industrial assembly. It separates wires, strands, and wire ropes in a controlled manner, with minimal burr formation and high repeatability. In work environments where Darda GmbH products such as hydraulic rock and concrete splitters, concrete shears, steel shears, or Multi cutters are used, the wire cutting shear performs numerous preparatory and accompanying tasks – from removing tie wire and safety wires to trimming wire mesh and ropes for transport, securing, and dismantling.
Definition: What is a wire cutting shear
A wire cutting shear is a hand-held or assisted cutting tool whose blade geometry is specifically designed for clean, low-deformation separation of wire, strands, and wire ropes. In contrast to side cutters (pliers with a wedge-shaped cut) or bolt cutters (for solid bolts and reinforcing steels), wire cutting shears typically work with scissor-like, semi-round, or guillotine-type blades. This results in shorter crush zones, reduced splaying on strands, and better cut quality, especially for multi-strand ropes and hard wires.
Design types, cutting geometry, and materials
Wire cutting shears are available in different versions, each tailored to wire diameter, material strength, and the application environment. The most important features:
Typical designs
- Hand wire cutting shears with leverage for soft to hard wire, often with return spring and latch.
- Ratchet wire cutting shears for multi-strand ropes: incremental force build-up, controlled cut, low splaying.
- Guillotine or notch-cut shears for harder wires and spring steels, with a defined initial cut.
- Hydraulically assisted hand shears for larger diameters or higher tensile strengths where compact, mobile solutions are required.
Blade geometry
- Bypass/scissor principle: Two blades passing by each other for smooth cut surfaces, suitable for strands and ropes.
- Guillotine principle: One blade against an anvil – precise, powerful, good for hard single wires.
- Part-round/half-round blades: Enveloping guidance of the rope, minimizes fraying on wire ropes.
Materials and hardness
- Blades made of chromium-vanadium or chromium-molybdenum steel, often induction-hardened for long service life.
- Corrosion protection through coating or blued surfaces; grips with slip-resistant coverings for a secure hold.
- Replaceable cutting inserts on professional versions: economical replacement instead of full tool change.
It is essential to match blade geometry, leverage, and material hardness to the tensile strength of the wire to be cut (e.g., soft tie wire vs. spring steel or high-strength strands).
Use in concrete demolition and specialized deconstruction
In selective deconstruction and during the demolition of concrete components, the wire cutting shear performs numerous functions that prepare or secure the use of heavy tools:
- Remove tie wire and mat ends: Before gripping with concrete shears, ties on reinforcing mats are cut to facilitate the removal of individual bars.
- Create access: Wire meshes, auxiliary ropes, and temporary fastenings are released so that rock and concrete splitters can be applied with minimal residual stress.
- Secure and cut: Hangers, wire hangers from ceiling claddings, or safety wires on covers are cut in a controlled manner to prevent uncontrolled oscillations or snap-back.
- Edge finishing: Protruding wire ends after partial cuts are trimmed flush to reduce injury and snagging hazards.
Distinction and interplay with concrete shears, steel shears, and rock and concrete splitters
Wire cutting shears are complementary tools to Darda GmbH’s hydraulic tools:
- Concrete shears: Cut reinforcing steel while crushing concrete. The wire cutting shear prepares by removing tie wires and light wire connections, creating clean attack points.
- Steel shears and multi cutters: For profiles, massive reinforcement bars, or thick-walled pipes. Wire cutting shears handle fine work on strands, wire ropes, tension bands, and thin wire parts.
- Rock and concrete splitters: Act based on pressure and with low vibration. Wire cutting shears are used to release temporary safety devices, wire nets, or transport ropes before splitting.
This creates a coordinated workflow: first, separate small parts and wire connections; then disassemble components with concrete shears or split them in a controlled manner with rock and concrete splitters.
Application in building gutting and cutting
During the gutting of buildings, the wire cutting shear is a versatile tool:
- Shortening wire hangers in suspended ceilings, cutting wire safety ties on ventilation and cable trays.
- Cutting tie wires when securing partial components before using concrete shears or steel shears.
- Cutting wire fences, grates, and light wire connections on fixtures.
Rock demolition, tunnel construction, and natural stone extraction
Wire connections and ropes are also encountered in rock and tunnel construction:
- Cutting safety and marking ropes, wire nets, or spacer wires before setting split cylinders.
- Working on wire ropes at temporary anchorage points or covers to create clearances for splitters.
- Shortening tie wire on reinforcement cages for linings or temporary formwork.
Selection criteria and capacities
The correct wire cutting shear is selected by diameter, tensile strength, and design of the wire to be cut:
- Wire material: Soft wire (tie wire), medium-strength steel wire, spring steel, stainless steel strands, wire ropes.
- Cutting range: Manufacturers specify a maximum wire thickness – this applies only to the defined strength class; with higher tensile strength, the permissible thickness is reduced.
- Blade form: Half-round/bypass blades for ropes and strands; guillotine-type blades for hard single wires.
- Ergonomics: Choose grip size, leverage, weight, and balance according to usage frequency.
- Maintenance/service: Availability of replacement blades, easy cleaning, corrosion protection.
Safe working practices
Safety takes priority – especially with tensioned wires and strands:
- Personal protective equipment: Cut-resistant gloves, safety glasses; for wire ropes, consider additional face protection.
- Cut without tension: Relax or secure the wire; secure the cut-off section to prevent snap-back.
- Check tool condition: No nicks, chipping, or play in the joints; check latch and return spring.
- Electrical lines: Work only when de-energized; wire cutting shears are not electrical cable shears with a stripping function.
- Work environment: Ensure a stable stance; secure the cutting area against unauthorized access.
Cutting technique and quality
The following procedure is recommended for reproducible, clean cuts:
- Position the wire or strand perpendicular to the blade; for ropes, fix the sheath with adhesive tape to avoid unraveling.
- Cut with a continuous, steady stroke – with ratchet versions, work step by step and without twisting.
- Check edges after the cut; if necessary, deburr carefully. For flush trimming, apply flat to minimize potential injury points.
Care, maintenance, and service life
Regular care increases precision and tool life:
- Clean and lightly oil (joint, outer cutting faces); remove aggressive media to avoid corrosion.
- Do not misuse the blades (no nails, hardened bolts, or contact with stone/concrete).
- Replace damaged blades in good time; re-sharpen only according to manufacturer approval, as induction-hardened edges can only be reworked to a limited extent.
- Store dry; keep the latch closed to protect the blades.
Avoiding common mistakes
- Overloading: Wire that is too hard or too thick leads to chipping; observe capacity specifications.
- Wrong blade form: Strands are crushed by wedge cuts – use suitable bypass/half-round blades.
- Lateral pressure: Twisting causes nicks; always cut straight.
- Unsuitable application: Reinforcing bars and profiles belong in steel shears or concrete shears, not in the wire cutting shear.
Role in the workflow with Darda GmbH tools
In projects involving concrete demolition and deconstruction, building gutting, rock demolition and tunnel construction, as well as special operations, the wire cutting shear supports the efficient use of Darda GmbH tools:
- Preparatory: Removing wire ties, nets, and ropes to allow safe positioning of concrete shears and rock and concrete splitters.
- Accompanying: Re-cutting, trimming flush, and securing wire ends during removal with steel shears and multi cutters.
- Concluding: Cleaning edges and removing residual wires for an orderly handover of the construction site.
Standards, markings, and documentation
Wire cutting shears are subject to general standards and safety requirements for hand tools. Typical specifications include maximum wire thickness in millimeters and the associated tensile strength (e.g., soft/medium/hard wire). Clear, traceable documentation of cutting capacities, regular tool inspection, and verifiable user instruction contribute to safe, compliant use in day-to-day operations. Legal requirements may vary by region and should generally be incorporated into work planning.
Sustainability and tool economy
The right wire cutting shear reduces effort, scrap, and energy consumption: clean cuts reduce rework, avoid material losses, and extend the service life of adjacent components. Replaceable blades and proactive maintenance reduce resource demand – a plus in projects designed for efficient workflows and low environmental impact.