Technical Reference
Edm Drawing Requirements
A released EDM drawing should state material and condition, datums, controlled dimensions, functional surfaces, finish or edge requirements, quantity, inspection, and revision. A 3D model supports geometry but does not replace these release requirements.
Quick Answer
Send a controlled 2D drawing that identifies material, heat-treatment condition, datums, tolerances, functional surfaces, quantity, inspection, and revision. Add a STEP or STP model when geometry is complex; the model shows shape, while the drawing controls what must be accepted.
RFQ Preparation Points
What to Send
Missing datums or ambiguous surface notes can require requoting even when the 3D model is complete. The consequence changes fit, function, or service performance for the What Drawings Are Needed for EDM Quote decision; it is not only a change in surface appearance.
How to Use the Files
Build the drawing around the features that control fit and function. Use one datum scheme for machining and inspection, separate geometry from surface acceptance, and state any missing decision as an explicit quotation assumption.
What Causes Delays
A model without controlled requirements or a drawing without usable geometry forces assumptions. Missing revision, datums, material condition, tolerance, finish, quantity, or inspection can stop production or trigger a revised quotation.
What the Drawing Must Control
The drawing is the release document. It tells the manufacturer which dimensions, surfaces, edges, material conditions, reports, and revisions are contractual. The 3D model provides geometry, but it cannot show which requirement takes priority unless the drawing says so.
File Roles
| Input | What it defines | What is missing without it |
|---|---|---|
| 3D model (STEP/STP/IGES) | geometry and feature relationships | geometry may need to be rebuilt or interpreted from dimensions |
| 2D drawing (PDF/DXF/DWG) | material, datums, tolerances, finishes, notes, and revision | quotation must carry assumptions that can trigger re-quote |
| Process notes | access, post-process, inspection, packaging, and end-use constraints | the technically correct feature may still be quoted with the wrong release route |
Missing-Input Consequences
| Missing item | Immediate consequence | Quotation treatment |
|---|---|---|
| Material grade or condition | speed, support, surface, and post-process cannot be planned | hold for clarification or state a material assumption |
| Tolerance / functional faces | no way to separate critical from noncritical work | quote a standard allowance and flag re-quote risk |
| Quantity | setup and batch economics cannot be calculated | quote prototype quantity only |
| Revision | risk of quoting or producing the wrong design | hold until revision is confirmed |
What a Model Cannot Replace
A model-only package leaves material, tolerance, finish, inspection, and revision open to assumption. A drawing-only package may require geometry reconstruction. The controlled package uses both, but the drawing remains the authority for acceptance.
Inspection and Surface Inputs
On the released drawing, separate dimensional acceptance from texture, recast, edge condition, corrosion, and post-processing. Tie each requirement to a named face and datum, and state the inspection method and revision that govern release.
What Drawings Are Needed for EDM Quote Drawing and Release Checkpoints
- Identify the controlled feature, material condition, access direction, and functional datum for this What Drawings Are Needed for EDM Quote decision.
- Separate dimensional requirements from texture, edge, recast, corrosion, fatigue, or post-process acceptance.
- State the inspection method, sampling or first-article requirement, drawing revision, quantity, and any documentation needed for release.
Practical Next Step
Send the 3D model, released 2D drawing, material grade and condition, controlled dimensions, functional surfaces, quantity, inspection requirements, and revision number. If an item is unknown, identify it explicitly so the quotation can state the assumption.
What to Remember
Send a controlled 2D drawing that identifies material, heat-treatment condition, datums, tolerances, functional surfaces, quantity, inspection, and revision. Quotation and production should use the same controlled revision, material, quantity, process scope, and inspection requirements.
Technical Reference
Use the values as planning references and define the functional requirement on the controlled drawing.
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
Is a 3D model enough?
No. It does not release material, tolerances, surfaces, or inspection.
Can a sketch be quoted?
Yes for a rough budget; production needs controlled files.
When should inspection be defined?
Before quotation and setup.
What causes the most delays?
Missing material condition, datums, functional callouts, quantity, or report scope.