Skip to content 
Benefits of Custom Wire EDM Machining
Custom Wire EDM Machining Processes
MXY delivers precision Custom Wire EDM Machining services for businesses that need precise, high-quality parts of modern manufacturing. With advanced 3-axis, 4-axis, and 5-axis CNC milling and CNC turning centers, we process a wide range of materials including aluminum, stainless steel, titanium, brass, copper, and engineering plastics to tolerances as tight as ±0.001mm.
CNC Turning
Experience high precision and efficiency with MXY Machining’s CNC Turning Services, expertly producing cylindrical components with unmatched accuracy and speed.
CNC Milling
MXY Machining’s CNC Milling Services deliver precise cutting and shaping of materials into complex parts with exceptional accuracy and surface finish.
CNC Routing
MXY Machining’s CNC Routing services deliver precise shaping and cutting of various materials and customizable designs with high repeatability and efficiency.
Lead Time for Custom Wire EDM Machining
Order Type |
Standard Lead Time |
Express Service |
|---|---|---|
| Prototypes & Small Batches | 3 – 7 working days | 2 – 3 working days |
| Medium Production Runs | 7 – 15 working days | 5 – 7 working days |
| Large Volume Orders | 15 – 25 working days | 15 – 25 working days |
Custom Wire EDM Machine Materials
Wire EDM only processes electrically conductive metals. This non‑contact cutting method works regardless of material hardness, delivering sharp internal corners, fine contours and tight tolerances for mould inserts, aerospace components and medical custom parts.
Tool Steel (D2, A2, M2, S7)
Hardened tool steel performs excellently for custom wire EDM machine materials. Machined post‑heat‑treatment without distortion, suited for stamping dies, mould blocks and wear‑resistant custom tooling parts.
Stainless Steel (304, 316L, 17‑4 PH)
Popular custom wire EDM machine materials for corrosion‑resistant custom components. Handles work‑hardened grades well, producing clean burr‑free edges for medical, food‑equipment and precision fixture parts.
Titanium & Titanium Alloys (Ti‑6Al‑4V Grade5)
Tungsten Carbide
Demanding custom wire EDM machine materials for ultra‑hard custom wear‑parts. Impossible for standard milling, wire EDM cuts complex profiles without chipping for cutting tools and die inserts.
Superalloys (Inconel 718, Hastelloy X)
High‑temperature custom wire EDM machine materials for custom aerospace and energy hardware. Overcomes severe work‑hardening issues common in conventional CNC machining.
Aluminum Alloys (6061‑T6,7075‑T6)
Fast‑cutting custom wire EDM machine materials for lightweight custom prototypes and fixtures. Delivers high accuracy on thin‑wall custom components for automotive and optical assemblies.
Copper & Brass (C110, C360)
Custom Wire EDM Machine Surface Finishes
Medical CNC parts require surface finishes that meet strict regulatory, biocompatibility, and sterilization standards. Unlike general industrial machining, every finish must be cleanable, corrosion-resistant, and traceable with no crevices where bacteria or contaminants can harbor.
As-Cut Wire EDM (Standard Single Pass)
Passivation process
The default wire EDM finish from a single roughing pass. Characteristic “orange peel” recast layer (white layer) with fine spark-eroded pitting, Ra typically 1.6–3.2 µm. No mechanical burrs, EDM cuts without contact but the recast layer may contain micro-cracks. Suitable for internal features, die work, and non-critical surfaces.
Skim Cut / Multi-Pass EDM
Passivation process
One or more additional slower cutting passes (skim cuts) after the roughing pass, removing a thin layer and significantly reducing the recast layer. Achieves Ra 0.4–1.6 µm with a smoother, semi-gloss spark-eroded texture. Standard for precision gears, splines, and die components requiring tighter tolerances and better surface integrity.
High-Precision Fine Finish EDM
Passivation process
Multiple (3–6+) skim passes with progressively lower power settings, achieving near-mirror EDM surfaces at Ra 0.1–0.4 µm with minimal recast layer. The finest achievable wire EDM finish used for medical instruments, aerospace turbine components, and high-precision tooling where surface integrity is critical. Slower and more costly but eliminates the need for secondary polishing.
Recast Layer Removal / Polished
Passivation process
Post-EDM process that completely removes the recast (white) layer and heat-affected zone via grinding, lapping, or hand polishing. Produces a smooth, glossy, metallurgically sound surface free of micro-cracks. Essential for fatigue-critical aerospace components, medical implants, and high-wear tooling where the EDM recast layer would compromise performance or biocompatibility.
Deburred & Edge Honed
Passivation process
Wire EDM produces no mechanical burrs, but cut edges can have sharp micro-edges and residual recast at corners. Deburring and edge honing (via tumbling, abrasive flow, or manual work) breaks sharp edges, removes loose recast particles, and produces safe, smooth corners. Standard for handled parts, assemblies, and components where sharp edges would be a safety or assembly concern.
Bead Blasted
Passivation process
High-pressure blasting with glass beads or aluminum oxide media creates a uniform matte/satin finish on EDM parts. Partially removes the loose recast layer, hides EDM texture variation, and produces a consistent non-reflective surface. Commonly used on titanium medical implants (to promote osseointegration), stainless steel instrument handles, and aluminum aerospace components.
Bead Blaste
Black Oxide (Steel & Tool Steel)
Passivation process
Chemical conversion coating that creates a uniform matte black finish on steel and tool steel EDM parts. Minimizes light reflection (useful for optical tooling and gauges), provides mild corrosion protection, and does not affect dimensional accuracy. Commonly applied to EDM-machined dies, punches, fixtures, and tooling components where a non-reflective black surface is desired.
Electropolished (Stainless Steel)
Passivation process
Electrochemical process that removes the EDM recast layer and micro-burrs from 316L stainless steel EDM parts, producing an ultra-smooth (Ra 0.2–0.4 µm), highly corrosion-resistant, easy-to-clean surface. The gold standard post-EDM finish for reusable surgical instruments and medical devices simultaneously removes the heat-affected zone and passivates the surface.
Anodized (Aluminum)
Passivation process
Type II or Type III anodizing applied to aluminum EDM parts after skim cutting. Creates a hard, corrosion-resistant, dyeable aluminum oxide layer in any color (black, blue, red, clear). Seals the EDM cut surfaces and provides wear protection. Widely used for aerospace components, electronic enclosures, and precision tooling made from 6061/7075 aluminum.
Passivated (Stainless Steel)
Passivation process
Chemical treatment (citric or nitric acid) that removes free iron from EDM-cut stainless steel surfaces and restores the protective chromium oxide layer. Standard post-processing for all 316L/304 stainless EDM parts enhances corrosion resistance without changing dimensions, appearance, or the EDM surface texture. Often combined with skim cutting for optimal surface integrity.
