EDM Machining Services
Wire EDM and sinker EDM for hardened materials and complex geometries. Machine what others can't with electrical discharge technology.
EDM Technologies We Offer
Wire EDM
Precision cutting with brass or coated wire for 2D profiles, tapers up to 45°, and thicknesses up to 16".
- ✓ ±0.0001" accuracy
- ✓ No tool wear
- ✓ Burr-free cuts
- ✓ Automated operation
Sinker EDM
Ram EDM for complex 3D cavities, blind features, and sharp internal corners in hardened materials.
- ✓ Complex 3D shapes
- ✓ Mirror finishes
- ✓ Deep ribs & slots
- ✓ Textured surfaces
Small Hole EDM
Fast hole drilling from 0.012" to 0.250" diameter for start holes, cooling channels, and vent holes.
- ✓ Holes at any angle
- ✓ Up to 12" deep
- ✓ Multiple holes
- ✓ Blind & through
Why Choose EDM?
Unique Capabilities
- • Machine hardened materials (up to 70 HRC)
- • No mechanical stress or distortion
- • Sharp internal corners possible
- • Thin walls and delicate features
- • Burr-free processing
Perfect For
- • Injection mold components
- • Stamping dies and punches
- • Aerospace components
- • Medical instruments
- • Gear and spline forms
EDM Applications by Industry
Tool & Die
- • Injection mold cavities
- • Stamping dies
- • Extrusion dies
- • Punches & inserts
- • Core pins
- • Ejector pins
Aerospace
- • Turbine blade slots
- • Cooling holes
- • Fuel injector nozzles
- • Honeycomb seals
- • Fir tree roots
- • Complex brackets
Medical
- • Surgical instruments
- • Implant texturing
- • Bone plates & screws
- • Dental tools
- • Biopsy punches
- • Micro components
Automotive
- • Injection nozzles
- • Gear forms
- • Spline shafts
- • Valve seats
- • Prototypes
- • Special tooling
Electronics
- • Lead frames
- • Contact pins
- • Micro connectors
- • Heat sinks
- • Shield components
- • Test fixtures
Energy
- • Turbine components
- • Valve bodies
- • Nozzle guides
- • Seal rings
- • Flow restrictors
- • Special fittings
Featured EDM Machine Shops
Connect with experienced shops equipped with modern EDM equipment
New Jersey Precision Technologies, Inc.
Mountainside, NJ
EDM Intelligent Solutions (West Palm Beach)
West Palm Beach, FL
EDM Technical Capabilities
Wire EDM Specs
- Wire Diameter:
- 0.004" - 0.012"
- Max Thickness:
- Up to 16"
- Accuracy:
- ±0.0001"
- Surface Finish:
- 8-16 Ra µin
- Taper Angle:
- Up to ±45°
Sinker EDM Specs
- Work Volume:
- Up to 40" x 30" x 16"
- Electrode Materials:
- Graphite, Copper
- Min Corner Radius:
- 0.001"
- Surface Finish:
- 2-4 Ra µin (VDI 0)
- Depth Control:
- ±0.0002"
Max material hardness
Min corner radius
Mirror finish possible
Design Tip: EDM requires a conductive path, so include starter holes for wire EDM and consider electrode access for sinker EDM. Add 0.001-0.003" per side for finishing passes.
Materials We EDM
Tool Steels
- • D2, A2, O1
- • H13, S7
- • M2, M4
- • CPM steels
- • Pre-hardened
Stainless
- • 303, 304, 316
- • 17-4 PH
- • 420, 440C
- • Duplex grades
- • Precipitation hardened
Exotic Alloys
- • Inconel 625, 718
- • Hastelloy
- • Titanium alloys
- • Tungsten
- • Molybdenum
Carbides
- • Tungsten carbide
- • Carbide tooling
- • PCD (limited)
- • Cermet materials
- • Carbide preforms
Note: EDM only works on electrically conductive materials. Non-conductive materials like plastics, ceramics, and glass cannot be EDM machined.
EDM Machining FAQs
What is EDM machining?
EDM (Electrical Discharge Machining) is a non-contact machining process that uses electrical sparks to erode material. It's ideal for hardened materials, complex shapes, and tight tolerances that are difficult or impossible to achieve with conventional machining.
Wire EDM vs Sinker EDM?
Wire EDM uses a thin wire electrode to cut through material like a bandsaw, ideal for 2D profiles and through-holes. Sinker EDM (ram EDM) uses a shaped electrode to burn cavities into material, perfect for complex 3D shapes, blind features, and mold cavities.
How long does EDM take?
EDM is slower than conventional machining but offers unmatched precision. Wire EDM typically cuts at 1-20 square inches per hour. Sinker EDM varies widely based on depth and complexity. Multiple passes improve finish but increase time.
What's the heat affected zone?
EDM creates a small heat-affected zone (HAZ) called the recast layer, typically 0.0001-0.001" thick. This can be minimized with proper parameters and removed with finishing passes. The HAZ is much smaller than with laser or plasma cutting.
Can EDM make sharp corners?
Wire EDM creates corners with a radius equal to the wire diameter plus spark gap (typically 0.005-0.010"). Sinker EDM can create sharp internal corners limited only by electrode manufacturing capabilities, often down to 0.001" radius.
Need Precision EDM Machining?
Get competitive quotes from shops specializing in wire and sinker EDM. Perfect for hardened materials, tight tolerances, and complex geometries.