Product Specification :
Combination Pliers (often called "linesman" or "universal" pliers) are a multi-purpose hand tool that combines gripping jaws with a wire-cutting edge. They are designed to be the "Swiss Army Knife" of the pliers family, capable of gripping, twisting, bending, and cutting.
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1. Anatomy of the Head
The head of a combination plier is divided into three distinct functional zones:
- Flat Gripping Zone: The serrated tips used for gripping flat objects and pulling wires.
- Burner Hole (Pipe Grip): A curved, serrated section in the middle of the jaws designed to grip rounded objects like pipes, nuts, or bolts.
- Side Cutters: Hardened cutting edges located near the pivot point for maximum leverage when cutting medium-to-hard wires.
2. Material & Construction
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Feature
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Specification
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Body Material
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Chrome Vanadium Steel (Cr-V) or High-Carbon Tool Steel.
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Edge Hardness
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Induction-hardened cutting edges (approx. 58–64 HRC).
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Joint Type
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High-leverage lap joint or rivet joint for smooth operation.
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Finish
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Polished head with lacquer coating or Black Phosphate for rust prevention.
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3. Key Technical Specifications
- Standard Lengths: 160mm (6"), 180mm (7"), and 200mm (8").
- Cutting Capacity: Usually rated for:
- Soft Wire: (e.g., Copper/Aluminum) up to $4.0\text{mm}$.
- Hard Wire: (e.g., Steel wire) up to $2.0\text{mm}$ to $2.5\text{mm}$.
- Handle Insulation: * Standard: Multi-component plastic grips.
- VDE/Insulated: Rated for 1,000V for electrical work (identified by Red/Yellow handles).
4. Performance Requirements
- Leverage: High-leverage designs place the pivot point closer to the cutting edge, reducing the hand force required by up to 35%.
- Jaw Alignment: When closed, the tips should meet perfectly with no visible light between the cutting edges.
- Torsional Strength: The jaws must resist twisting when used to bend heavy-gauge wire or sheet metal.
5. Common Applications
- Electrical: Twisting wires together before capping and cutting cables to length.
- Mechanical: Gripping small fasteners or removing cotter pins.
- General Maintenance: Straightening bent components and general-purpose holding.
