Process & Material
Tellurium Copper Small Hole EDM Drilling Feasibility Review
Tellurium 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. Tellurium Copper is a free-machining copper alloy that retains high conductivity while cutting more easily than pure copper; the supplied condition affects support, discharge energy, finishing, and inspection.
Quick Answer
Small Hole EDM is suitable for Tellurium 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
A free-machining copper alloy that retains high conductivity while cutting more easily than pure copper. 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 Tellurium 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 conductive edges and mixed thermal response can make fixturing and finish control more important than cutting force. The far end of the hole can drift even when the entry diameter and start position remain stable during the final portion of a high-aspect-ratio hole; acceptance must focus on phase boundaries, local texture and thin functional edges. On Tellurium Copper, the resulting defect can be taper or exit breakup caused by differential erosion along the wall. For Tellurium Copper, qualify settings on the actual alloy condition, limit aggressive roughing, and compare local edge response before final sizing. Verify both ends of the hole and use sectioning or suitable wall inspection where service risk requires it; document local texture, differential erosion and edge continuity for Tellurium Copper.
How Small Hole EDM Works on Tellurium Copper
Small Hole EDM advances a rotating tubular electrode through Tellurium 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 or work-hardened | 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. |
How This Material Behaves
Tellurium copper retains high conductivity but includes telluride particles that improve conventional machinability. In EDM, this means fine edges can show local texture variation while the bulk material still dissipates discharge heat rapidly. Support small contact features, use controlled finishing rather than excessive energy, and inspect edge integrity and conductivity-critical faces after cleaning. For Small Hole EDM, soft conductive edges and mixed thermal response can make fixturing and finish control more important than cutting force. 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 Tellurium 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.
Tellurium 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 and half-hard or work-hardened.
- 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 Tellurium Copper, soft conductive edges and mixed thermal response can make fixturing and finish control more important than cutting force; 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 Tellurium 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
Tellurium Copper is compatible with Small Hole EDM when the feature matches the process access. The supplied condition determines support, finishing, surface control, and inspection.
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.
- Process: Small Hole EDM
- Material: Tellurium Copper
- 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.