Technical Reference
Micro EDM Hole Size Guide Technical Reference
Learn how micro EDM supports very small conductive features, micro holes, micro slots and inspection-sensitive details.
What This Page Answers
Learn how micro EDM supports very small conductive features, micro holes, micro slots and inspection-sensitive details.
Feature size
Define hole diameter, depth, aspect ratio, positional tolerance, material grade and whether the hole is a start hole or a functional feature.
Inspection method
Confirm how the hole or micro feature should be checked, especially when size, position or burr-sensitive edges matter.
Common mistake
Asking only for a hole size can miss depth limits, electrode access, flushing, positional tolerance and inspection requirements.
How to Use This Technical Reference
Learn how micro EDM supports very small conductive features, micro holes, micro slots and inspection-sensitive details. Use the page to decide what must be confirmed on the drawing before quotation.
Define the question
Decide whether the main issue is process choice, material behavior, tolerance, surface finish, surface integrity or RFQ preparation.
Match it to the drawing
Connect the topic to specific features, dimensions, surfaces or inspection notes instead of treating it as general EDM theory.
Prepare the review package
Send drawing files, material grade, quantity, tolerance, finish target and inspection requirements together so the answer can be project-specific.
Common mistakes to avoid
- Reading the topic as a fixed machining promise instead of a review guide.
- Leaving material condition, feature access or inspection requirements out of the quote request.
- Using a technical page to decide alone when the drawing has high-risk features.
When this page is not enough
This reference is not enough when the project needs guaranteed tolerance, recast-layer control, special documentation, sample validation or a production-specific inspection plan.
Technical Planning Notes
Micro EDM for Fine Features: Key technical points
Micro EDM is considered for very small conductive features micro holes micro slots and inspection-sensitive details that need careful process review.
What to check first
- Feature size
- Electrode/wire size
- Material behavior
- Inspection method
- Batch repeatability
When this route fits
- Micro slots
- Micro holes
- Precision conductive features
Drawing details to define
- Feature drawing
- Magnified detail view
- Tolerance
- Inspection method
Quality note: Micro EDM requires careful setup and inspection planning.
Technical Explanation
This guide explains how hole diameter, depth, material, positional tolerance and inspection method affect small-hole EDM review.
Project question: What hole sizes are possible with micro EDM?
Process Capability Facts
We review EDM process fit from material conductivity, feature access, thickness, geometry, tolerance, surface finish and inspection requirements.
Tolerance, Surface Finish and Geometry Review
Typical tolerance and surface finish depend on material, thickness, feature geometry, flushing, finishing passes and inspection method. Final values must be confirmed from the drawing.
Recast Layer / Surface Integrity Notes
Surface integrity, recast layer, micro-crack risk, post-processing and inspection depend on the material, EDM process, geometry and machine setup.
Technical Review Checklist
| Concept | Micro EDM Hole Size Guide |
|---|---|
| How we use this guide | We use these points to discuss EDM process fit before confirming the production approach. |
| Drawing review | We confirm material conductivity, feature access, geometry, thickness, tolerance, surface finish and inspection method from your drawing. |
| Project details | Please include drawings, material grade, critical dimensions and any required inspection or surface-integrity controls. |
Inspection and Capability Reference
Inspection planning may include dimensional measurement, optical measurement, surface roughness checks and report requirements according to the drawing.
How to Apply This to Your EDM Project
Use this reference as a planning page, not as a fixed universal promise. EDM results still depend on the drawing, material condition, feature access, machining setup and inspection method.
What to decide
Confirm whether this topic affects process selection, tolerance strategy, surface finish, post-processing, inspection or RFQ preparation for your drawing.
What changes the answer
Material grade, heat treatment, thickness, inside radius, cavity depth, electrode or wire access, flushing and finish-pass requirements can change the recommended EDM route.
What to send
Send drawings, material specification, critical dimensions, finish targets, quantity, application notes and inspection requirements so the review can be tied to the actual part.
Technical Note
This technical reference helps organize drawing requirements, material information and review points before project-specific EDM discussion.
Final Takeaway
Use this topic as a decision aid before quotation: define the feature, material condition, tolerance, surface requirement and inspection method, then send the drawing for project-specific EDM review.
Use This Guide to Prepare Your RFQ
Contact us when your drawing and requirements are ready for review.
- Drawing or part sketch
- Material grade
- Thickness / part size
- Quantity
STEP/STP, DXF, DWG, PDF, IGS/IGES or ZIP.
Confidential drawing review. NDA support available on request.
Frequently Asked Questions
What design details matter for micro EDM?
Feature size, aspect ratio, electrode access, material conductivity, fixturing, tolerance and inspection method are important.
Why are feature size and aspect ratio important?
Very small or deep features can be limited by electrode strength, flushing, debris removal and measurement method.
What inspection method is needed for micro EDM?
Inspection may require optical measurement, microscopy or other suitable methods depending on feature size and tolerance.
Can micro EDM be used for every small part?
No. The material must be conductive, and the feature geometry, access and inspection method must be reviewed.
Which files support micro EDM review?
Useful files include 2D or 3D drawings, material grade, feature size, tolerance, surface finish and inspection requirements.