Process & Material
C110 Copper Small Hole EDM Drilling Feasibility Review
C110 Copper can be machined with Small Hole EDM when the geometry matches small through holes, deep holes, angled holes, cooling holes, vent holes, and start holes in hard or heat-resistant alloys. C110 Copper is nearly pure copper with very high electrical and thermal conductivity; the supplied condition affects support, discharge energy, finishing, and inspection.
Quick Answer
Small Hole EDM is suitable for C110 Copper when the feature is a small, deep, angled, cooling, vent, or start hole in conductive material. The supplied condition must be stated before tolerance and surface requirements are confirmed.
Key Material Decisions
How This Material Behaves
Nearly pure copper with very high electrical and thermal conductivity. In Small Hole EDM, the supplied condition changes bore stability, breakthrough quality, wall finish, and the inspection plan for straightness and position.
Choosing the Right Condition
Choose Small Hole EDM for small through holes, deep holes, angled holes, cooling holes, vent holes, and start holes in hard or heat-resistant alloys. State the exact C110 Copper condition, then set tolerance, finish, support, and inspection from the controlled feature rather than the whole part.
Risks to Manage
For Small Hole EDM, soft edges and high heat flow change discharge efficiency and fixturing. As a deep small hole approaches breakthrough, electrode shortening and debris transport can change taper, straightness and wall condition together; the interaction is most important at soft contact edges and compensation-sensitive geometry. For C110 Copper, this can produce exit enlargement or smearing combined with diameter loss from electrode wear. For C110 Copper, use nonmarking support, conservative compensation and a finishing sequence that limits overcut and edge rounding. Verify both ends of the hole and use sectioning or suitable wall inspection where service risk requires it; document overcut, edge rounding, clamp marks and functional contact surfaces for C110 Copper.
How Small Hole EDM Works on C110 Copper
Small Hole EDM advances a rotating tubular electrode through C110 Copper while dielectric exits at the cutting tip. Electrode wear, runout, internal flushing, true hole depth and breakthrough support control entry-to-exit diameter, taper, straightness and wall condition. Hole diameter, depth and depth-to-diameter ratio—not stock thickness alone—define the process limit.
Small Hole EDM Capability Reference
| What you're asking | What you can expect |
|---|---|
| Feature types | small through holes, deep holes, angled holes, cooling holes, vent holes, and start holes in hard or heat-resistant alloys |
| Tolerance | ±0.010–0.050 mm |
| Surface finish | Hole-wall finish is feature-dependent |
| Typical diameter | About 0.3–3.0 mm for ordinary planning |
| Depth driver | Depth-to-diameter ratio, straightness, and breakthrough |
| Main limitation | Very small diameter combined with extreme depth may require specialized equipment, staged electrodes, and dedicated metrology. |
Material Condition Reference
| Condition | What to expect | Watch out for | Surface notes |
|---|---|---|---|
| annealed | Use gentle fixturing and adjust energy for high conductivity. | Soft edges can mark or roll under poor support. | Keep contact, bearing, and cosmetic faces as separate finish requirements. |
| half-hard | Balance work-hardening stress with wear compensation. | Thin sections can move and micro features can round as electrodes wear. | Inspect edge radius and functional texture. |
| hard-drawn | Use conservative finishing on hard-drawn or aged stock. | Over-finishing can remove useful texture or shift contact dimensions. | Apply finishing only to functional faces. |
How This Material Behaves
C110 copper is very soft and has exceptionally high electrical and thermal conductivity. In EDM, this means heat is carried away quickly, so stable discharge and flushing can be harder to maintain than on steel, while edges and contact faces mark easily during handling. Use rigid support, tuned low-energy finishing, and protect or clean functional electrical surfaces immediately after machining. For Small Hole EDM, soft edges and high heat flow change discharge efficiency and fixturing. In small holes, electrode wear and breakthrough can enlarge or smear the exit edge even when the entry size is stable.
Surface Integrity and Post-Process
For Small Hole EDM on C110 Copper, use gentle fixturing and a finish strategy that protects contact, sealing or heat-transfer surfaces. Reduce discharge energy near final size and breakthrough, then evaluate entry, exit, taper and wall condition separately. For fatigue-, flow- or seal-critical holes, specify recast acceptance or post-process cleaning and finishing instead of relying on diameter alone.
C110 Copper Small Hole EDM Checkpoints
- Confirm that the feature matches small through holes, deep holes, angled holes, cooling holes, vent holes, and start holes in hard or heat-resistant alloys.
- State the supplied condition: annealed, half-hard, and hard-drawn.
- Mark the controlled dimensions, functional surfaces, datum scheme, and inspection method.
Typical Parts and Features
- electrical contacts
- electrodes
- busbar details
- turbine-blade cooling holes
- mold and die vent holes
- injector and nozzle holes
Limits and Better Alternatives
Main Limit
Hole depth, diameter, aspect ratio, flushing, and breakthrough quality—not stock thickness alone—set the practical limit. On C110 Copper, soft edges and high heat flow change discharge efficiency and fixturing; the supplied condition still controls support, finishing, and surface-integrity review.
Consider Another Route When
Use mechanical drilling when the tool can reach economically, laser drilling for suitable thin geometry, or Micro EDM for smaller precision holes.
Practical Next Step
Send the C110 Copper drawing with condition, controlled geometry, tolerance, functional surface callouts, quantity, and inspection requirements. If the route is unclear, we will compare Small Hole EDM with the adjacent EDM or conventional process.
Practical Takeaway
C110 Copper is compatible with Small Hole EDM when the feature matches the process access. The supplied condition determines support, finishing, surface control, and inspection.
Request a Machining Feasibility Review
Send material grade, drawing files, tolerance and quantity. We confirm process fit before quoting.
- Process: Small Hole EDM
- Material: C110 Copper
- Drawing or part sketch
- Material grade
- Thickness / part size
- Quantity
- Tolerance and critical dimensions
- Surface finish or inspection requirement
STEP/STP, DXF, DWG, PDF, IGS/IGES or ZIP.
Confidential drawing review. NDA support available on request.
Frequently Asked Questions
Can C110 Copper be machined with Small Hole EDM?
Yes, when the feature is a small, deep, angled, cooling, vent, or start hole in conductive material. C110 Copper is electrically conductive and the final route follows the feature geometry and supplied condition.
What controls Small Hole EDM on C110 Copper?
The main process controls are electrode diameter, true hole depth, depth-to-diameter ratio, tubular-electrode wear, flushing pressure, breakthrough quality, and hole-wall inspection. The C110 Copper condition adds dimensional-stability and surface-integrity requirements.
What is the main risk?
For Small Hole EDM, soft edges and high heat flow change discharge efficiency and fixturing. As a deep small hole approaches breakthrough, electrode shortening and debris transport can change taper, straightness and wall condition together; the interaction is most important at soft contact edges and compensation-sensitive geometry. For C110 Copper, this can produce exit enlargement or smearing combined with diameter loss from electrode wear. For C110 Copper, use nonmarking support, conservative compensation and a finishing sequence that limits overcut and edge rounding. Verify both ends of the hole and use sectioning or suitable wall inspection where service risk requires it; document overcut, edge rounding, clamp marks and functional contact surfaces for C110 Copper.
What should I send for review?
Send the drawing, exact C110 Copper condition, controlled geometry, tolerance, functional surface requirements, quantity, and inspection expectations. If any item is undecided, send what you have and we will help complete the review.