Makino V77 Graphite
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The Makino V77 Graphite is the largest machine in Makino's dedicated graphite electrode VMC lineup, built for shops producing the oversized electrodes used in automotive, appliance, and large-format die/mold applications. When bumper mold electrodes, large forging die electrodes, and multi-cavity electrode arrays exceed the V56i's capacity, the V77 steps in.
Axis travel measures 750 x 600 x 400 mm (29.5 x 23.6 x 15.7 in) on X/Y/Z, giving the largest work envelope in Makino's graphite machine range. The 1,000 x 600 mm (39.4 x 23.6 in) worktable handles loads up to 600 kg (1,323 lb), accommodating large graphite blanks and heavy multi-electrode pallet setups. Roller-type linear guides on all axes maintain the stiffness and positioning accuracy needed for consistent electrode finishes across the full travel range.
The spindle runs up to 20,000 RPM with an HSK-A63 taper, delivering 22 kW (30 hp) — the most powerful spindle in the graphite lineup. This power rating supports aggressive roughing of large graphite blanks where material removal rates directly impact electrode department throughput. Makino's core-cooled spindle technology keeps the bearing assembly thermally stable during sustained high-power operation.
The fully sealed enclosure with high-capacity dust extraction is critical at this scale, where roughing large electrodes generates substantial graphite dust volumes. The standard 30-tool ATC (optional 60-tool) manages the variety of roughing and finishing tools needed for complete electrode processing. The Pro 6 control with SGI.5 contouring handles both high-feed roughing toolpaths and precision finishing passes.
Rapid traverse reaches 36 m/min (1,417 ipm) on all axes. Machine weight is approximately 11,000 kg (24,251 lb). The V77 competes with the Roeders RXP 800, OPS Ingersoll Eagle V9 XXL, and Roeders RXP 950 in the large graphite VMC segment. New pricing typically ranges from $280,000 to $380,000.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 750 mm (29.5 in) |
| Y-Axis Travel | 600 mm (23.6 in) |
| Z-Axis Travel | 400 mm (15.7 in) |
| Max Spindle Speed | 20,000 RPM |
| Spindle Taper | CAT40 (HSK-A63, HSK-F63) |
| Spindle Motor Power | 22 kW (30 hp) |
| Tool Capacity | 30 (40, 80) |
| Table Size | 1,000 x 600 mm (39.4 x 23.6 in) |
| Table Load Capacity | 600 kg (1,323 lb) |
| Rapid Traverse Rate | 787 in/min |
| Guideway Type | Roller-type linear guides |
| Dust Extraction | High-capacity sealed enclosure with negative-pressure system |
| Machine Weight | ~11,000 kg (24,251 lb) |
| CNC Control | Makino Professional 6 (Pro 6) |
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| Metric | English |
| Spindle Rpm | 20,000 (30,000 opt) |
| Cutting Feedrate | 787 in/min |
| Maximum Workpiece | 55.1" x 27.6" x 21.7" |
| Maximum Payload | 5,510 lbs |
| Tool To Tool | 5 sec |
| Maximum Tool Diameter | 4.7" (30, 40 ATC) |
| Maximum Tool Weight | 17.6 lbs |
| Optional Atc Capacity | Yes |
| Makinooptionalatccapacity | Yes |
Specifications sourced from makino.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Largest travel in Makino's graphite lineup (750 x 600 mm) handles oversized electrodes for automotive bumper molds and large forging dies
- 22 kW spindle with HSK-A63 delivers the power for aggressive roughing of large graphite blanks while maintaining finishing capability
- 600 kg table capacity supports heavy multi-electrode pallet setups for batch electrode production
- High-capacity dust extraction system handles the significant dust volumes generated by roughing large graphite workpieces
- Optional 60-tool ATC supports extended unattended production runs with multiple electrode types and sizes
- Roller-type linear guides maintain accuracy and stiffness across the full extended travel range
Limitations
- At 11,000 kg and the largest footprint in the graphite lineup, the V77 requires significant floor space and installation investment
- 20,000 RPM spindle speed is insufficient for optimal cutting with micro-diameter tools under 1 mm — small electrode detail work still requires a V22 or V33i
- Premium pricing ($280K-$380K) makes the V77 a major capital investment that requires high electrode volume to justify
- Large sealed enclosure increases dust extraction system maintenance costs compared to smaller machines
- Lower rapid traverse (36 m/min) compared to smaller graphite machines increases cycle time on complex multi-feature toolpaths
Best For
Frequently Asked Questions
01
New V77 Graphite machines typically price between $280,000 and $380,000 depending on configuration. A fully equipped machine with 60-tool ATC, probing, and automation interfaces approaches $360,000-$380,000. Used V77 machines from 2015-2020 trade between $140,000 and $230,000 when available.
02
The V77 adds approximately 190 mm more X travel and 150 mm more Y travel over the V56i, with a larger table (1,000 x 600 vs 800 x 500 mm) and higher table capacity (600 vs 400 kg). The V77 also has a more powerful 22 kW spindle vs the V56i's 18 kW. However, both share the same 20K RPM speed and HSK-A63 taper. The V77 costs approximately $60,000-$70,000 more. Choose the V77 only when your electrodes regularly exceed the V56i's 560 x 450 mm envelope.
03
For medium-to-large electrodes, yes. The 22 kW spindle handles aggressive roughing, and the 20K RPM with SGI.5 contouring delivers quality finishes with tools 1 mm and larger. However, for small electrodes with sub-1 mm features, you'll still want a V22 or V33i with their higher RPM spindles. Most shops with the V77 also have at least one smaller graphite machine for micro-electrode work.
04
The V77 handles all common EDM graphite grades effectively. Fine-grain graphites like Poco EDM-3, Toyo Tanso ISEM-8, and SGL R8710 produce the best electrode surface finishes. Ultra-fine grain materials like Poco EDM-200 and ISEM-7 are used for the highest-detail electrode features. Coarser grades like EDM-AF5 machine faster but produce rougher surfaces. The Pro 6 control includes material-specific cutting parameters for common graphite grades.
05
The V77's high-capacity extraction system is designed for the significantly higher dust volumes generated when roughing large electrodes. It typically includes larger pre-filters, higher-capacity HEPA filtration, and a more powerful extraction fan than smaller graphite machines. Some shops supplement the built-in system with an external dust collector, especially during heavy roughing shifts. Filter maintenance costs are proportionally higher than on the V33i or V56i due to the greater dust volumes.
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