Makino EDNC65
Key Specifications
X Travel
Y Travel
Z Travel
Accuracy
Repeatability
work tank dimensions
Overview
The Makino EDNC65 is a mid-range CNC sinker EDM built for the demands of precision mold and die shops. With 650 x 450 x 450 mm of X/Y/Z travel and a work tank accommodating workpieces up to 2,500 kg, the EDNC65 handles the full range of injection mold cavities, die sets, and aerospace component features that define high-volume toolroom production. It sits at the core of Makino's EDNC sinker EDM series, offering a balance of working envelope and machine capability that addresses the most common shop-floor sinker EDM applications.
Makino's HyperI generator is the engineering centerpiece of the EDNC65. It delivers industry-leading metal removal rates while holding electrode wear ratios well below 1% on graphite finishing. The generator's digital spark gap control samples conditions at microsecond intervals, adjusting discharge energy to prevent arcing and maintain stable cutting throughout deep cavities. Mirror-quality surface finishes to VDI 2 (Ra 0.1 um) are achievable on steel, and the generator's low-wear modes protect expensive copper and graphite electrodes across long unattended programs.
The EDNC65 is built on Makino's cast iron C-frame architecture with integral thermal management. Spindle cooling, servo motor cooling, and dielectric temperature control work together to maintain dimensional stability across multi-hour production runs — a critical requirement when tolerances of ±2 um are the target. The Z-axis uses a precision ballscrew driven by a digital AC servo, and optional C-axis rotation enables orbiting strategies that are otherwise difficult to program on fixed-spindle machines.
Control is handled by Makino's Hyper Pro Control, a touchscreen-equipped CNC platform with graphical electrode management, automatic orbit programming, and built-in process databases for common electrode material and workpiece combinations. The control links directly to Makino's remote monitoring systems for unattended production management. An optional ATC (automatic tool changer) for electrodes supports multi-electrode programs for roughing through mirroring in a single setup.
Full Specifications
| Parameter | Value |
|---|---|
| Work Tank Dimensions | 990 x 720 x 500 mm (39.0 x 28.3 x 19.7 in) |
| X-Axis Travel | 650 mm (25.6 in) |
| Y-Axis Travel | 450 mm (17.7 in) |
| Z-Axis Travel | 450 mm (17.7 in) |
| Max Workpiece Weight | 2,500 kg (5,511 lb) |
| Dielectric System | Filtered petroleum-based dielectric with temperature control |
| Surface Finish | VDI 2 (Ra 0.1 um) achievable |
| Control System | Makino Hyper Pro Control (touchscreen CNC) |
| Generator Power | Makino HyperI digital generator, up to 80 A peak current |
| Machine Weight | 6,800 kg (14,991 lb) |
| Positioning Accuracy | 2 um |
| Repeatability | 1 um |
| Metal Removal Rate | 600 mm3/min (graphite roughing) |
| Electrode Weight Max | 150 kg (331 lb) |
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Specifications sourced from makino.com — verified 2026-03-28
Strengths & Limitations
Strengths
- HyperI generator delivers class-leading metal removal rates and mirror-quality VDI 2 surface finishes from a single machine
- Electrode wear ratios consistently below 1% on graphite reduce tooling cost and improve part accuracy on long production programs
- Integrated thermal management maintains ±2 um dimensional stability across extended unattended production cycles
- Hyper Pro Control's built-in process databases simplify programming for common electrode-workpiece material combinations
- 2,500 kg workpiece capacity accommodates large injection mold bases and automotive die components without a workpiece handling penalty
- Makino's global service network and deep North American presence ensure rapid response when downtime occurs
Limitations
- Premium pricing places the EDNC65 above comparable-travel sinker EDMs from Sodick, Chmer, and ONA — best justified when generator capability and service response are priorities
- Hyper Pro Control, while powerful, has a steeper learning curve for operators unfamiliar with Makino's process database approach
- Machine footprint is substantial — plan for a minimum of 4 x 5 m of shop space including dielectric unit and service access
- Optional electrode ATC adds significant cost; shops running simple 2-3 electrode jobs may not recover the investment
Best For
Frequently Asked Questions
01
New Makino EDNC65 machines typically range from $180,000 to $320,000 depending on generator configuration, electrode ATC, C-axis rotation, and dielectric system options. Used EDNC65 machines trade between $60,000 and $130,000 depending on age and condition.
02
Both are mid-to-large sinker EDMs in the same travel class. Makino's HyperI generator is widely regarded as best-in-class for metal removal rates and electrode wear, while Sodick's linear motor drive system delivers superior axis positioning accuracy. Makino leads on generator performance; Sodick leads on axis speed and precision.
03
Yes. The HyperI generator includes dedicated process modes for both graphite and copper electrode materials, with automatic adjustments to discharge energy, polarity, and flushing parameters to optimize performance for each material.
04
Yes. With an optional electrode ATC, the EDNC65 can execute multi-electrode programs unattended — roughing with oversized graphite electrodes then switching to finishing electrodes without operator intervention. The Hyper Pro Control includes fire detection and dielectric monitoring for safe unattended operation.
05
The EDNC65 achieves VDI 2 (Ra 0.1 um) on steel with copper electrodes in mirror-finish mode. Standard mold textures in the VDI 18-30 range (Ra 0.8-4.5 um) are achieved at much higher speeds. Roughing typically starts at VDI 40+ and finishes are dialed in progressively.
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