GF Machining Solutions Vertical Machining Centers (VMC)

GF Machining Solutions Mikron MILL S 400 Graphite

Est. $250,000 - $400,000 Possible older model Updated 2026-10-02

This model was not found in GF Machining Solutions's current lineup when we checked on 2026-10-02 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.

Key Specifications

X Travel

400 mm (15.7 in)

Y Travel

350 mm (13.8 in)

Z Travel

400 mm (15.7 in)

Max Spindle

42,000 RPM

Spindle Taper

HSK-E32

Tool Capacity

20 (expandable to 40)

How much does the GF Machining Solutions Mikron MILL S 400 Graphite cost?

Estimated price range

Est.$250,000 - $400,000

Our best estimate for a vertical machining centers (vmc) in this class — not a quote from GF Machining Solutions. Configuration moves it a long way.

Overview

The Mikron MILL S 400 Graphite is a dry-cutting graphite milling machine listed with 400 x 350 x 400 mm of travel, a 500 x 400 mm table rated for 250 kg and a 42,000 RPM Step-Tec spindle with an HSK-E32 interface at 13 kW. It is not in GF Machining Solutions' current lineup, and the table has not been matched to a GF page, so these are listed figures only.

Everything in the listed table is aimed at graphite electrodes. It machines dry with no coolant, an integrated HEPA-grade closed-loop system extracts the dust, and the linear guides, ballscrews, drives and electrical cabinet are listed as fully sealed. The HSK-E32 interface is smaller than the HSK-E40 of the current Mikron HSM 500 GRAPHITE, which keeps the tools small and suits fine electrode ribs and detail.

Other listed figures are a 60 m/min rapid traverse, positioning accuracy of 0.003 mm, 20 tools expandable to 40, a Heidenhain TNC 640 control and a machine weight of 7,500 kg. The Z travel of 400 mm is generous for the size, which helps with tall electrode blanks.

For a current alternative, the Mikron HSM 500 GRAPHITE offers 500 x 450 x 350 mm of travel, a 550 x 450 mm table for 200 kg and a 42,000 rpm HSK-E40 spindle with dedicated dust extraction.

Full Specifications

Parameter	Value
X-Axis Travel	400 mm (15.7 in)
Y-Axis Travel	350 mm (13.8 in)
Z-Axis Travel	400 mm (15.7 in)
Table Size	500 x 400 mm (19.7 x 15.7 in)
Table Load Capacity	250 kg (551 lb)
Max Spindle Speed	42,000 RPM
Spindle Taper	HSK-E32
Spindle Motor Power	13 kW (17 hp)
Spindle Technology	Step-Tec precision spindle
Machining Type	Dry (graphite) — no coolant
Dust Extraction	Integrated HEPA-grade closed-loop system
Sealed System	Linear guides, ballscrews, drives, and electrical cabinet fully sealed
Tool Capacity	20 (expandable to 40)
Rapid Traverse Rate	60 m/min (2,362 ipm)
Positioning Accuracy	0.003 mm (3 µm)
Machine Weight	7,500 kg (16,535 lb)
CNC Control	Heidenhain TNC 640

Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.

Strengths & Limitations

Strengths

Dry machining with an integrated HEPA-grade closed-loop dust extraction system
Linear guides, ballscrews, drives and electrical cabinet listed as fully sealed
42,000 RPM Step-Tec spindle with HSK-E32 interface for small electrode cutters
Listed positioning accuracy of 0.003 mm
400 mm of Z travel for tall electrode blanks

Limitations

13 kW spindle on an HSK-E32 interface is limited to small tools and light cuts
X travel of 400 mm and Y travel of 350 mm limit multi-electrode setups
Built for dry graphite work only, with no coolant system listed

Best For

Graphite electrodes for sinker EDM Fine electrode ribs with small HSK-E32 tools Shops with an existing Heidenhain TNC 640 programming base

Frequently Asked Questions

01 Is the MILL S 400 Graphite still in GF's range?

It does not appear in GF Machining Solutions' current lineup. The current graphite machine is the Mikron HSM 500 GRAPHITE, with 500 x 450 x 350 mm of travel and a 42,000 rpm HSK-E40 spindle.

02 Can the MILL S 400 Graphite run coolant?

The table lists it as a dry graphite machine with no coolant, using an integrated HEPA-grade closed-loop dust extraction system. It is not set up for wet cutting of steel or copper.

03 What tooling does the MILL S 400 Graphite take?

The spindle is listed with an HSK-E32 interface at 42,000 RPM and 13 kW, and the magazine holds 20 tools, expandable to 40. Check which magazine a used machine has and budget for HSK-E32 holders.

04 What should I check on a used machine?

The condition of the seals on the guides and ballscrews, the dust extraction filters and the spindle, since graphite dust is abrasive. The listed machine weight is 7,500 kg, and control is a Heidenhain TNC 640.