Home > News > Industry News > Diamond Wire Cutting: Metal Fabrication Advantages
In the world of metalworking, precision cutting plays a vital role in creating intricate designs and shapes. Traditional methods such as sawing or grinding have long been used, but they often result in rough edges and imprecise cuts. The introduction of endless diamond wire cutting has brought a revolutionary transformation to the industry, delivering unmatched levels of precision and efficiency.
Endless diamond wire is the most reliable way to cut hardened metals without a heat-affected zone because diamond grit bonded to a continuously moving steel loop shears the material mechanically rather than melting it. The loop runs at 30–60 m/s (35 m/s standard) with a 0.35–0.5 mm kerf, and wire changes take about a minute instead of the 5–15 minutes a reciprocating spool machine needs.
For hardened steel and tungsten carbide use 0.55–0.8 mm semi-coated wire at 35 m/s, dry. For structural steel and large blocks use 1.0–3.5 mm. Correct tension alone extends endless loop life by 25–40%.
Diamond wire is a cutting tool used to cut various materials, including metals. It is made of a thin and flexible steel wire coated with industrial-grade diamond powder to enhance its cutting capabilities. This wire is formed into a loop, creating a continuous cutting line, hence the name “wire.” Diamond wire is typically used with a specially designed cutting machine or equipment.
The distinction that matters in practice is how that loop moves. An endless diamond wire loop runs in one direction only, driven by powered pulleys, over a workpiece fed into it. Because the wire never reverses, tension stays constant through the whole cut, there is no directional striation on the cut face, and no wire is consumed by the reversal stroke. This is the opposite of spooled reciprocating wire, where the wire feeds onto the workpiece and reverses at every stroke — a mechanism that leaves directional marks, fluctuates in tension and cannot dry-cut.
Cutting metals can be done using the ESH300 or ESH600 equipment, which can be chosen based on the size of the metal material. These machines are our own developed equipment specifically designed to work with endless diamond wire. The horizontal format is built for oversized workpieces, with a built-in rotating function and dry/wet separation for safe, foolproof control.
For heavier or larger-format work, the vertical and gantry formats (ESG series) cover silicon cropping, sectioning and general precision cutting. Send the machine model and your workpiece envelope for an exact recommendation.
Diamond wire cutting involves the use of a thin wire coated with industrial-grade diamonds. These diamonds are renowned for their exceptional hardness, capable of effortlessly cutting even the toughest metals. The endless loop travels continuously in one direction over the workpiece on a pulley system, and the embedded diamonds grind away the metal, creating a clean and precise cut. Unlike a reciprocating saw, the wire is not wrapped around or fed into the material — it passes over it in tension, which is what makes a narrow kerf and an undamaged edge possible.
| Dimension | Endless (closed-loop) wire | Spooled (reciprocating) wire |
|---|---|---|
| Motion | Unidirectional, continuous | Reverses direction at every stroke |
| Linear speed | 30–60 m/s (35 standard) | 5–15 m/s (limited by reversal) |
| Directional striations | None | Present on cut face |
| Tension stability | Constant, automatic | Fluctuates at every reversal |
| Wire change time | ~1 minute | 5–15 minutes |
| Kerf width | 0.35–0.5 mm | 0.5–1.0+ mm |
| Scrap / rejection rate | Near zero | 5–15% |
| Dry cutting | Possible (no coolant pollution) | Usually needs coolant |
| Tool life | 50–200% longer | Baseline |
| Material | Recommended diameter | Coating | Typical speed |
|---|---|---|---|
| Hardened tool steel, tungsten carbide | 0.55–0.8 mm | Semi-coated (dry) | 35 m/s |
| Magnetic materials (NdFeB, ferrite) | 0.35–0.6 mm | Full-coated | 35 m/s |
| Structural steel, large blocks | 1.0–3.5 mm | Semi-coated (dry) | 35 m/s |
| Aluminium and soft alloys | 0.35–0.6 mm | Full-coated, fine grit | 30–35 m/s |
| Precision parts, thin sections | 0.3–0.5 mm | Full-coated | 30–35 m/s |
There are several reasons to choose our company:
In summary, choosing our company means you will receive certified high-quality products from a manufacturing company with strong capabilities in both production and research and development. We can also provide customized solutions based on your specific requirements.
Can diamond wire cut metal?
Yes, and it is the standard method for hardened steels, tungsten carbide, magnetic alloys and refractory metals. The mechanism is mechanical micro-grinding: diamond grit bonded to a continuously moving steel loop shears the metal without a heat-affected zone. For soft, ductile metals such as aluminium the cutting action changes to smearing rather than grinding, which is why wire diameter and grit size matter more there.
What wire diameter should be used for thick steel plate?
Thicker wire resists breakage on heavy cuts. For structural steel and large blocks, 1.0–3.5 mm is typical; for tool steel and carbide, 0.55–0.8 mm; for thin or precision parts, 0.3–0.5 mm. A semi-coated wire runs dry on abrasive metals and avoids coolant disposal altogether.
How fast does an endless diamond wire saw cut metal?
The endless loop runs at 30–60 m/s (35 m/s standard) with a 0.35–0.5 mm kerf, which is three to four times the linear speed of spooled reciprocating wire at 5–15 m/s. Feed rate then depends on the material, the wire diameter and the machine format, and is quoted per application.
Does diamond wire cutting leave a heat-affected zone like laser or plasma cutting?
No. Diamond wire removes material mechanically, so there is no melting and no heat-affected zone. This is the main technical argument for diamond wire over laser or plasma on hardened alloys and any part whose metallurgical properties must be preserved.
Which machine format suits a large metal workpiece?
The horizontal format (ESH series) is built for oversized hard and brittle workpieces with a built-in rotating function and dry/wet separation. Vertical and gantry formats suit smaller envelopes and profiles. Send the machine model and workpiece dimensions for an exact recommendation.
Ensoll Tools offers free test cutting: send us a section of the metal you are cutting and we return the cut part with surface-quality data, throughput observations and a wire-life estimate — so you can size a production line on evidence rather than on a datasheet. Tell us the alloy, the section thickness and your hourly volume, and our engineers will specify the wire diameter, coating pattern and machine format for you. Call +86-19937798228 or send your sample details through the contact page.
If you have any question, please contact us
