Loop Type Diamond Wire

Description

Core Wire Unit

High-tensile alloy steel or tungsten wire serves as the core substrate. It is engineered for a high fatigue limit and elastic modulus, supporting constant linear speeds of 50–80 m/s. The material maintains structural integrity and precise tension under heavy loads, ensuring the wire does not stretch or break during operation.

Abrasive Coating

Industrial synthetic diamond grit is fixed to the surface via a precision electroplating process. The nickel-based bonding layer ensures uniform crystal distribution and high retention force. This configuration facilitates sharp, efficient micro-grinding with minimal thermal impact, specifically optimized for SiC and sapphire.

Joint Structure

The loop features a proprietary seamless connection where the joint diameter is calibrated to match the main wire body exactly. This engineering prevents mechanical shock and vibration during high-speed rotational passes. By eliminating thickness variations at the weld, it ensures consistent cutting stability and longer tool life.

Loop Geometry

The endless closed-loop design enables continuous one-way motion, removing the vibration associated with reciprocating saws. This geometry eliminates reverse marks, resulting in superior surface finishes and extremely low TTV. The narrow kerf design, ranging from 0.3mm to 1.0mm, significantly reduces expensive material loss.

Advantages &Features

The endless loop architecture facilitates ultra-high-speed unidirectional motion, significantly reducing cycle times and maximizing throughput for large-scale production.

Precision electroplating provides superior diamond retention, extending the tool life and decreasing the frequency of consumables replacement to lower total costs.

Constant one-way tension eliminates the mechanical stress of reciprocating reversals, preventing wire breakage and ensuring continuous, unattended operation reliability.

Optimized grit distribution delivers a clean micro-grinding action, effectively reducing subsurface damage and minimizing the need for expensive secondary polishing.

The narrow kerf design reduces raw material waste during slicing, which is critical for maximizing profit margins when processing high-value crystals or rare metals.

Enhanced thermal dissipation during high-speed rotation prevents heat buildup, protecting sensitive workpieces from thermal cracking and preserving material integrity.

Smooth joint technology ensures a uniform diameter across the loop, eliminating vibration to protect precision machine spindles and extend equipment service life.

Flexible length and diameter customization allow for seamless integration with diverse machine models, ensuring perfect compatibility with your existing infrastructure.

Stable cutting trajectories maintain high TTV accuracy, enabling the production of thinner wafers with consistent quality to meet strict semiconductor industry standards.

Parameter

Product Parameter

Outer Diameter (mm)	Core Wire	Coating Method	Core Wire (mm)	Working Tension Force (N)	Breaking Tension Force (N)	Recommended Length (mm)
0.3	Tungsten	Full	0.21	60	115	1M–4M
0.5	Tungsten	Full	0.4	110–130	250	1M–6M
0.65	Steel	Full	0.4	110–130	250	1M–10M

Application

SiC Ingot Cropping

Precision slicing of silicon carbide for EV semiconductors.

Sapphire Glass Slicing

High-speed cutting of optical windows and watch crystals.

Magnetic Material Sizing

Dicing NdFeB magnets with minimal kerf loss and damage.

Ceramic Substrate Profiling

Shaping alumina and zirconia parts for aerospace components.

Lab-Scale Crystal Sampling

Extracting pristine samples from rare or fragile minerals.

Graphite Electrode Shaping

Clean, dry cutting of high-density graphite for EDM molds.

FAQ

What is the use of loop type diamond wire?

Loop type diamond wire is used for precision slicing of hard, brittle materials including semiconductor crystals (silicon, SiC, GaAs), optical materials (sapphire, quartz), advanced ceramics, and research samples . Its closed-loop design enables continuous unidirectional cutting at high speeds up to 80 m/s, producing smooth surfaces with minimal material loss . Common applications include wafer production for electronics, LED substrate manufacturing, photovoltaic cell slicing, and laboratory sample preparation where cut quality and material conservation are critical .

What is a loop type diamond wire?

A loop type diamond wire is a closed-loop cutting tool consisting of a high-tensile metal core (steel or tungsten) coated with industrial diamond grit bonded via electroplating . Unlike traditional spooled wire that moves back and forth, it forms a continuous endless loop that rotates in one direction at high speed . This design eliminates vibration from directional changes, maintains constant tension, and enables precise cutting of hard brittle materials with narrow kerf widths as small as 0.3 mm .

What are the different types of diamond wire loop?

Diamond wire loops are categorized by coating pattern: full-coated (continuous diamond layer for smoothest surfaces), segmented-coated (abrasive zones with gaps for chip clearance and cooling), and thread/spiral-coated (helical diamond pattern balancing chip removal and surface quality) . They also vary by core material (steel or tungsten), diameter (0.3 mm to 3.5 mm), and diamond grit size for different cutting applications from precision laboratory work to industrial production .

How long does loop type diamond wire last?

Lifespan varies by application and material. For precision laboratory cutting of crystals like SrTiO3 or GaAs, estimated lifetime is approximately 30 cutting hours . Industrial production applications may last several days of continuous use depending on material hardness, cutting parameters, and proper maintenance . Factors affecting longevity include wire core material (tungsten ≥4000 MPa outlasts steel), diamond quality, tension control (typically 140-180 N), and adequate coolant flow . Proper operation can extend life by 25-40% .

How sharp is loop type diamond wire?

Loop type diamond wire cuts through abrasive grinding rather than sharp edges like a blade. Industrial diamond particles (typically 5-60 micron grit) embedded in the wire surface act as countless cutting points that grind through material . Electroplated nickel bonding provides very sharp, aggressive cutting edges for high material removal rates . “Sharpness” is determined by diamond grit size (finer grit = smoother finish, coarser grit = faster cutting) and can cut materials up to 9.5 on Mohs hardness scale .

Can loop type diamond wire cut metal?

Yes, but with limitations. Loop type diamond wire can cut certain metals including titanium alloys, nickel-based superalloys (Inconel), molybdenum plates, and precious metals where narrow kerf and minimal waste are required . It is also used for magnetic materials and sintered metal parts . However, it is not designed for general metal cutting of steel or aluminum, as these materials can load the diamond surface and reduce cutting efficiency . Diamond wire excels with hard brittle materials like ceramics, crystals, and stone rather than ductile metals .

Is loop type diamond wire made of diamond?

The wire core is made of high-tensile steel or tungsten, not diamond . Industrial-grade synthetic diamond particles are bonded to this core surface using electroplating (typically nickel-based) . This creates a composite tool where the diamond provides the cutting action while the metal core provides strength and flexibility. The diamond particles are firmly embedded in the coating and gradually exposed as the wire wears, maintaining cutting performance throughout its life .

What material cannot be cut by a loop type diamond wire?

Loop type diamond wire cannot cut materials harder than diamond, as diamond is the hardest known material (Mohs 10) . It is ineffective on extremely tough, ductile metals that load the diamond surface . Very soft, sticky materials like rubber or certain polymers may gum up the wire rather than cut cleanly . However, it can cut virtually anything softer than diamond, including semiconductors, optical crystals, ceramics, glass, stone, composites, and even ultra-soft materials like sponge and eggshells with proper parameters .