Sinker EDM Machines
Sinker EDM, also known as die-sinking EDM, ram EDM, plunge EDM or spark erosion machining, uses a shaped electrode to produce precision cavities, deep ribs and complex internal features.
Explore ESUNTEK Sinker EDM Machine
ESUNTEK provides high-precision Sinker EDM machines for complex cavities, deep molds and precision tooling.
– Excellent surface finish
– Stable discharge control
– Ideal for mold and die manufacturing
– Custom configurations available
Sinker EDM Manufacturing Since 2002
Founded in 2002, ESUNTEK is a Sinker EDM machine manufacturer in China.
We provide ZNC Sinker EDM machines, CNC Sinker EDM machines and high-precision models for different mold and cavity machining requirements.
In addition to standard machines, customized configurations are available, including automatic tool changers, additional axes and application-specific functions.
Which ESUNTEK Sinker EDM Machine Is Right for You?
ZNC Series
ESUNTEK ZNC Sinker EDM machines provide stable and cost-effective solutions for general mold and cavity machining.
– Multiple machining coordinate memory
– Automatic multi-stage machining control
– Arc and carbon-deposit prevention
– Adjustable discharge energy control
– Support for upward discharge machining
– Suitable for general mold and cavity production
CNC Series
ESUNTEK CNC Sinker EDM machines provide programmable multi-axis control for precision molds, complex cavities and automated machining.
– CNC-controlled multi-axis positioning
– Optional mirror-finish machining circuit
– Automatic multi-stage machining
– Stable discharge and arc prevention
– Programmable machining parameters
– Suitable for precision molds and complex cavities
N Series
The ESUNTEK N Series combines high mechanical rigidity, precision motion control and increased load capacity for demanding mold and cavity machining.
– Rigid machine structure
– High workpiece load capacity
– CNC-controlled precision positioning
– Servo motors, precision ball screws and linear guides
– Stable machining of large and heavy workpieces
– Suitable for high-precision molds and complex cavities
S Series
The ESUNTEK S Series features large travels and high load capacity for machining large molds, heavy workpieces and deep cavities.
– Large X, Y and Z travels
– High worktable load capacity
– Rigid structure for heavy-duty machining
– CNC-controlled multi-axis positioning
– Stable discharge control
– Suitable for large molds and deep cavity applications
ZNC Sinker EDM Machine Lineup
ZNC Sinker EDM Machines
ESUNTEK ZNC Sinker EDM machines provide stable and cost-effective spark erosion solutions for mold cavities, blind features and precision tooling.
The lineup includes models with different travels and worktable sizes for small, medium and large workpieces. Select a suitable ZNC die-sinking EDM machine according to the required cavity dimensions, workpiece weight, electrode capacity and discharge current.
CNC Sinker EDM Machine lineup
CNC Sinker EDM Machines
ESUNTEK CNC Sinker EDM machines provide programmable precision control for complex cavities, molds and high-accuracy components.
Stable discharge control, automatic multi-stage machining and optional mirror-finish capability are available for different production requirements.
N Series Double-Ram CNC Sinker EDM Machine
The ESUNTEK N Series double-head CNC Sinker EDM machine is designed for large molds, heavy workpieces and applications requiring increased machining capacity.
Its rigid machine structure and two independently controlled machining heads provide flexible spark erosion solutions for complex cavity and mold production.
N Series Single-Ram CNC Sinker EDM Machine
ESUNTEK N Series single-ram CNC Sinker EDM machines are designed for large molds, heavy workpieces and precision cavity machining.
The rigid machine structure, high load capacity and programmable CNC control provide stable spark erosion performance for deep cavities, complex internal features and demanding mold production.
S Series High-Precision CNC Sinker EDM Machine
The ESUNTEK S Series CNC Sinker EDM machine is designed for high-precision molds, complex cavities and fine surface finishing.
It supports mirror-finish spark erosion machining and features a lifting work tank for convenient workpiece loading, setup and maintenance. An optional C-axis can be added for rotary positioning and complex multi-angle machining.
Benefits of ESUNTEK Sinker EDM Machines
A Sinker EDM machine, also known as a die-sinking EDM or spark erosion machine, uses controlled electrical discharges to produce cavities and complex internal features in conductive materials.
1. Non-Contact Machining
Sinker EDM removes material through controlled electrical discharges between a shaped electrode and the workpiece. Because there is no direct cutting contact, the process minimizes mechanical force and workpiece deformation.
2. Machining of Hard Conductive Materials
Sinker EDM machines can process hardened tool steel, carbide, stainless steel, titanium alloys and other electrically conductive materials regardless of their mechanical hardness.
3. Complex Cavities and Internal Features
The shaped copper or graphite electrode allows the machine to produce mold cavities, blind features, deep ribs, narrow slots and complex internal geometries that are difficult to machine with conventional cutting tools.
4. High Precision and Repeatability
A rigid machine structure, precision motion components and stable discharge control help maintain dimensional accuracy and consistent machining results.
Actual accuracy depends on the machine model, electrode, workpiece material, cavity depth and machining conditions.
5. Controlled Surface Finish
Discharge parameters can be adjusted for roughing, semi-finishing and finishing. Selected CNC Sinker EDM configurations also support mirror-finish machining for applications requiring improved surface quality.
6. Stable Discharge Control
Arc prevention, automatic parameter adjustment and effective dielectric circulation help maintain stable spark erosion machining and reduce abnormal discharge conditions.
7. CNC and Automation Options
Depending on the machine configuration, CNC Sinker EDM machines can support programmed positioning, automatic multi-stage machining, electrode changing, process monitoring and optional C-axis control.
8. Flexible Machine Configurations
ESUNTEK provides ZNC and CNC Sinker EDM machines with different travels, worktable sizes, generator capacities and automation options for standard molds, precision cavities and large workpieces.
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EDM Parts
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FAQ About Sinker EDM Machines
1. What is a Sinker EDM machine?
A Sinker EDM machine uses a shaped copper or graphite electrode and controlled electrical discharges to produce cavities, blind features and complex internal geometries in conductive materials.
It is also commonly known as a die-sinking EDM machine, spark EDM machine or spark erosion machine.
2. What is the difference between ZNC and CNC Sinker EDM machines?
A ZNC Sinker EDM machine usually controls the vertical machining axis automatically, while the operator manually positions the worktable for different cavities.
A CNC Sinker EDM machine provides programmable multi-axis positioning, making it more suitable for complex cavities, precision molds, multiple machining locations and automated production.
3. What applications are suitable for Sinker EDM?
Sinker EDM machines are commonly used for plastic injection molds, die-casting molds, forging dies, deep ribs, blind cavities, narrow slots, fine details and complex internal features that are difficult to produce with conventional cutting tools.
4. What materials can a Sinker EDM machine process?
Sinker EDM can process electrically conductive materials such as hardened tool steel, stainless steel, carbide, titanium alloys, aluminum, copper and nickel-based alloys.
The material must be electrically conductive for conventional spark erosion machining.
5. Should I use a copper or graphite electrode?
Copper electrodes are commonly selected for fine details, stable finishing and applications requiring good surface quality. Graphite electrodes can provide faster material removal and are often suitable for larger cavities and rough machining.
The correct electrode depends on the workpiece material, cavity geometry, required surface finish and machining current.
6. Can a Sinker EDM machine produce a mirror finish?
Selected ESUNTEK CNC Sinker EDM machines support mirror-finish machining with the appropriate generator, electrode, dielectric condition and machining parameters.
Mirror-finish capability is not standard on every model, so the required surface roughness should be confirmed before machine selection.
7. Can a C-axis or automatic tool changer be added?
Selected CNC Sinker EDM configurations can be equipped with an optional C-axis for rotary positioning and complex electrode machining. Automatic tool changers and other automation functions are also available for suitable models and applications.
8. How do I choose the correct Sinker EDM machine?
Consider the maximum workpiece dimensions and weight, required X/Y/Z travel, cavity depth, electrode weight, generator capacity, required accuracy, surface finish and automation level.
Send ESUNTEK your workpiece drawing and machining requirements so that we can compare suitable ZNC and CNC Sinker EDM models.
9. How much does a Sinker EDM machine cost?
Sinker EDM machine prices depend on the machine travel, worktable size, ZNC or CNC control, generator capacity, precision level, mirror-finish capability and optional equipment.
Please provide your workpiece drawing, required specifications and destination country for an appropriate model recommendation and quotation.
Find the Right Sinker EDM Machine for Your Application
Not sure whether you need a ZNC or CNC Sinker EDM machine?
Send us your workpiece drawing and machining requirements. Our team will evaluate the cavity dimensions, material, electrode, required accuracy and surface finish, then recommend a suitable machine model and configuration.
– Workpiece drawing
– Workpiece material
– Maximum dimensions and weight
– Cavity dimensions and depth
– Electrode material and weight
– Required accuracy
– Required surface finish
– Automation requirements
– Destination country
Contact ESUNTEK for a Sinker EDM machine recommendation, technical proposal and quotation.
