EDM Machining Service

At Sochain Precision, our reliable wire & sinker EDM services offer the following:

Instant pricing with DFM review before cutting starts
Parts delivered in as fast as 7 days
Tight tolerances with high repeatability on fine features
Ideal for complex geometries and hardened materials
Suitable for precision prototypes and end-use components
Stable EDM process for sharp corners and deep cavities
Faster lead times to help shorten development cycles
Secure handling of your design data and IP protection
Flexible pricing based on speed and cost priorities
Manufactured under ISO 9001, ISO 13485, ISO 14001, and IATF 16949 systems

Rapid prototyping and full-scale production

ISO accredited & QC checks

All in-house processes

Used in over 50 countries

FREE Instant quotations

Electrical Discharge Machining (EDM) Materials at Sochain Precision

Below are common materials we process at Sochain Precision using wire and sinker EDM. These materials are selected when tight tolerances, hard alloys, or fine features are needed.

Material	Typical Grades	Properties	Available Finishing Options	Typical Lead Time
Aluminum Alloys	6061-T6, 7075-T6, 2024, 5052, MIC6	Lightweight, good conductivity, corrosion-resistant	Anodizing (Type II/III), Alodine, ENP, Media blasting, Powder coating	From 3 days
Tool Steel	D2, A2, O1, H13	High hardness, wear-resistant, stable after heat treatment	Black oxide, Polishing, Nitriding, Nickel plating	From 4–7 days
Stainless Steel	303, 304, 316, 420	Corrosion-resistant, strong, good for precision parts	Passivation, Electropolish, Bead blasting, Polishing	From 4–7 days
Titanium Alloys	Ti-6Al-4V (Grade 5), Grade 2	High strength-to-weight ratio, heat-resistant, biocompatible	Passivation, Polishing, Bead blasting	From 5–8 days
Copper & Brass	C110 Copper, C360 Brass, C260	Excellent electrical and thermal conductivity	Nickel plating, Tin plating, Polishing	From 3–5 days
Carbide (Tungsten Carbide)	YG6, YG8, WC-Co grades	Extremely hard, wear-resistant, and brittle in conventional machining	Precision polishing, Lapping	From 5–10 days

How to Start Your EDM Machining Project with Us?

Upload Your Files:Submit your CAD models and rudimentary project requirements for preliminary review, whether your design is practical or needs adjustment beforehand.DFM Feedback and Design Review: Our engineers will examine your design against machining hazards, tool accessibility, and datum preparations. Also, we will provide your practice DFM recommendations if a problem can be cost or accuracy-related, before production.Machining and Quality Control: Once approved, we will start performing EDM machining under a controlled environment. A first part(prototype) is checked to ensure critical dimensional and surface conditions before jumping into scale production.Packing and Delivery:Finished parts are carefully packed to avoid damage when in transit. We ship all over the US and globally to your desired destination and on your schedule without delay.

About Electrical Discharge Machining (EDM)

Electrical Discharge Machining removes material using controlled electrical sparks. It does not involve any cutting tool. The only limitation is that it is used only for conductive materials such as hardened steel, stainless steel, titanium, and carbide. Because there is no cutting force, parts remain stable even when features are thin, deep, or delicate.

In practical use, EDM is selected when milling cannot maintain sharp internal corners, when parts are already heat-treated, or when very fine profiles are required. It is widely used for dies, molds, precision slots, and complex internal features.

Steps Involved in the EDM Process

Set up in Dielectric Fluid:A tank of dielectric fluid is put between the workpiece and the electrode (or wire) to manage the spark and clear away the debris.Gap Control:The machine has a considerably narrow and constant distance between the electrode and the part surface.Spark Generation:Modulated electrical impulses generate sparks between the gaps.Material Erosion:The spark generates, and the workpiece loses a tiny bit of metal, which is melted and vaporized with each spark.Debris Flushing: The eroded particles are eliminated by the dielectric fluid to maintain a clean and stable gap.Shape Completion:The process is repeated until the desired geometry and size are programmed.

Why Choose Sochain Precision for Your Wire & Sinker EDM Project?

Stable EDM Setup

We meticulously control spark gap, flushing, and electrode position. This helps us keep sizes consistent, especially on deep slots and fine details.

Reliable Tolerance Control

The critical dimensions are verified during and after (Post-machining) machining. This reduces the chances of size drift on accuracy features.

Cuts well on Hardened Metals

Our EDM process is used to process tool steel, stainless steel, titanium, and carbide without cutting force. Even after heat treatment, parts retain their shape.

Prototype and Batch Work Support

To repeat orders(regardless of volumes), we use the same datum and machining logic as the first samples. This maintains consistent quality and precision when you shift to bulk volume.

Design Check: Pre Production

We inspect your drawing regarding access, corner limits, and flushing requirements. Problems are spotted at an early stage to prevent wastage of time.

Critical Care and Freighting

The machined parts are cleaned, checked, and packed with care. We ship orders according to your schedule.

Hobbing vs. Wire EDM vs. Sinker EDM

Each process serves a different purpose. The right choice depends on gear type, feature access, and required part precision. The comparison below reflects typical working ranges used in production at Sochain Precision.

Parameter

Hobbing

Wire EDM

Sinker EDM

Typical tolerance capability

ISO grade 6–12

ISO grade 7–12

ISO grade 8–12

Practical part size range

Small: ~1 × 1 × 0.3 mm

Large: up to ~500 × 500 × 800 mm

Small: ~3 × 3 × 0.3 mm

Large: up to ~300 × 300 × 200 mm

Small: ~3 × 3 × 0.3 mm

Large: up to ~200 × 200 × 150 mm

Best suited for

External spur and helical gears are produced in volume

External gears, gear shafts, fine profiles, through-cut features

Internal gears, blind cavities, sharp internal forms, hex or keyway pockets

Material compatibility

Broad range of machinable materials

Conductive metals and hard alloys

Conductive metals and hardened steels

Minimum internal radius

Not tool-limited in the same way

~0.05 mm standard

~0.01 mm with fine wire setup

~0.05 mm standard

~0.01 mm with fine electrode setup

FAQ’s

When should I choose EDM instead of CNC milling?

EDM is a better option when parts are already hardened, when internal corners must be very sharp, and when slots are too deep for standard milling tools. If tool pressure could distort the part, EDM is usually the safer process.

Does EDM change the material's hardness or properties?

The EDM process creates only a very thin recast layer on the surface. If your application is sensitive, we usually recommend polishing or secondary finishing to remove and reduce this layer.

What design details should I confirm before sending my EDM drawing?

You should check material conductivity, minimum corner radius, feature depth, and whether the cut is through or blind. Clear datums and tolerance notes also help us plan the EDM process correctly.

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