1998 Xermac XI 14 PZ Sinker EDM
Item No. 6107
🇺🇸 USAFinancingYear 1998
1996 Charmilles Roboform 40 Sinker EDM
Item No. 6106
🇺🇸 USAFinancingYear 1996
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About Used Sinker EDM Machines
Sinker EDM machines (also called ram EDM or die-sinker EDM) erode cavities into conductive workpieces using a shaped graphite or copper electrode plunged into the material under CNC control. Sinker EDM is essential for mold making — producing blind cavities, ribs, sharp internal corners, and textured surfaces that cutting tools cannot reach. Modern CNC sinkers feature automatic electrode changers, orbiting cycles, and fine-finish generator technology.
Related EDM Machines
Top Brands for Used Sinker EDM Machines
Sodick
Linear-motor EDM pioneer — wire and sinker machines with no-wear drive systems.
Makino
High-precision machining centers and EDM — the benchmark for die/mold work and hard milling.
Mitsubishi
EDM market leader — wire machines known for reliable auto-threading and fine surface finish.
AgieCharmilles
Swiss EDM heritage (GF Machining Solutions) — premium wire and die-sinking machines.
OcCean
MC Machinery
Mitsubishi EDM and laser distribution in North America — strong support and parts availability.
Common Applications
Frequently Asked Questions
What is a sinker EDM used for?
Sinker EDM creates cavities, ribs, and complex 3D features in hardened materials by plunging a shaped electrode into the workpiece. It is the standard process for injection mold cavities, die-casting dies, forging dies, and any blind feature that wire EDM cannot reach because the wire must pass through the part.
What is the difference between sinker EDM and wire EDM?
Sinker EDM plunges a shaped electrode into the workpiece to create a cavity matching the electrode's form — ideal for blind features and 3D shapes. Wire EDM cuts through the workpiece with a traveling wire, producing 2D profiles through any thickness. Mold shops typically run both: sinkers for cavities, wire for inserts and profiles.
How much does a used sinker EDM cost?
Used sinker EDM prices range from $10,000-$30,000 for older CNC ram machines to $50,000-$150,000+ for late-model CNC sinkers with automatic electrode changers. Sodick, Makino, and Mitsubishi hold value best.
Related Resources
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