FORM E

$80,000 - $130,000 Updated 2025-03-15

Key Specifications

X Axis Travel

350 mm (13.8 in)

Y Axis Travel

250 mm (9.8 in)

Z Axis Travel

250 mm (9.8 in)

Work Tank Size (L x W)

770 x 550 mm (30.3 x 21.7 in)

Max Workpiece Weight

500 kg (1,102 lbs)

Max Electrode Weight

50 kg (110 lbs)

Overview

The GF Machining Solutions FORM E is an economy-class sinker EDM built for shops that need reliable die-sinking capability without the price tag of a flagship machine. It fills a gap in the GF lineup by giving smaller tool rooms and job shops access to the same Swiss engineering and generator technology that powers the higher-end FORM series, just in a more compact and cost-conscious package.

At the heart of the FORM E is GF's Intelligent Speed Power Generator (iSPG), which delivers consistent surface finishes and predictable burn rates across a wide range of materials including hardened tool steels, carbide, and copper-tungsten. The generator adapts in real time to changing gap conditions, which means less operator babysitting and fewer burned electrodes. For a machine at this price point, the spark control is genuinely impressive.

The work zone accommodates molds and dies typical of small-to-medium production — enough X, Y, and Z travel for most insert work, small cavity dies, and medical components. The C-frame construction keeps things rigid during deep cavity burns, and the machine ships with GF's AC Form HMI, which simplifies programming for operators who may not have years of EDM experience. Touchscreen navigation, built-in technology databases, and automatic orbit strategies all come standard.

Electrode changing is manual on the base configuration, but the FORM E can be outfitted with a System 3R or Erowa tooling interface for automated electrode management. That upgrade path matters — it means a shop can start lean and scale into lights-out capability as volume justifies the investment.

Maintenance is straightforward by sinker EDM standards. The dielectric system is well-designed with easy filter access, and GF's remote diagnostics package (rConnect) is available for shops that want OEM support without waiting for a service tech to show up. Overall, the FORM E is a smart entry point for any shop moving into sinker EDM or replacing aging equipment without blowing the capital budget.

Compared to competitors like the Sodick AG40L or Makino EDAF2, the FORM E holds its own on surface finish quality and ease of use. Where it gives ground is in raw speed on large-area burns and maximum workpiece capacity. But for the work it's designed to do — precision cavities, fine details, and everyday die maintenance — it delivers solid value.

Full Specifications

Parameter	Value
X Axis Travel	350 mm (13.8 in)
Y Axis Travel	250 mm (9.8 in)
Z Axis Travel	250 mm (9.8 in)
Work Tank Size (L X W)	770 x 550 mm (30.3 x 21.7 in)
Max Workpiece Weight	500 kg (1,102 lbs)
Max Electrode Weight	50 kg (110 lbs)
Table Size (L X W)	550 x 350 mm (21.7 x 13.8 in)
Best Surface Finish (Ra)	0.1 µm (4 µin)
Generator	iSPG (Intelligent Speed Power Generator)
Control	AC Form HMI (Touchscreen)
Dielectric Tank Capacity	Approx. 350 L (92 gal)
Machine Weight	Approx. 2,800 kg (6,173 lbs)

Specifications sourced from gfms.com — verified 2026-03-28

Strengths & Limitations

Strengths

Swiss-built quality and generator technology at an economy price point
iSPG generator delivers excellent surface finishes down to Ra 0.1 µm
Intuitive AC Form touchscreen HMI lowers the learning curve for new operators
Upgrade path to System 3R or Erowa automation for future lights-out operation
GF rConnect remote diagnostics available for faster troubleshooting
Compact footprint fits well in smaller tool rooms

Limitations

Manual electrode changing on base configuration — automation is extra cost
Work envelope is limited compared to larger FORM models for big mold work
Burn speed on large-area roughing is slower than higher-end competitors
Smaller dielectric tank may require more frequent filtration maintenance on heavy use
Limited Z-axis travel restricts deep cavity work beyond 250 mm

Best For

Small to mid-size tool and die shops entering sinker EDM for the first time Mold shops needing a second or third EDM for overflow and detail work Medical device manufacturers burning small precision cavities Job shops replacing aging sinker EDMs on a moderate budget Shops looking for a platform that can grow into automation later Maintenance and repair work on existing injection molds and stamping dies

Frequently Asked Questions

01 What does the GF Machining Solutions FORM E cost?

The FORM E typically falls in the $80,000 to $130,000 range depending on configuration. Base machines with manual electrode changing sit at the lower end, while adding automation-ready tooling interfaces, upgraded filtration, or the rConnect remote diagnostics package pushes the price toward the upper range. Contact your local GF sales office or authorized distributor for a current quote.

02 What materials can the FORM E sinker EDM machine?

The FORM E can burn any electrically conductive material. Common workpiece materials include hardened tool steels (D2, H13, S7, A2), stainless steels, carbide, titanium, copper alloys, and Inconel. Electrode materials are typically copper and graphite, with the iSPG generator optimized for both.

03 Can the FORM E be automated for unattended operation?

Yes. While the base machine uses manual electrode changing, the FORM E is designed to accept System 3R Macro or Erowa ITS tooling interfaces. Combined with a compatible electrode changer and GF's automation software, shops can run the machine unattended for extended periods. This is a common upgrade path as production volume grows.

04 How does the FORM E compare to the Sodick AG40L?

Both are popular economy sinker EDMs. The FORM E edges ahead on surface finish quality and HMI usability thanks to GF's iSPG generator and AC Form interface. The Sodick AG40L counters with its linear motor drives for faster positioning and slightly larger work envelope. The choice often comes down to brand preference, local dealer support, and whether you prioritize finish quality or speed.

05 What kind of surface finish can the FORM E achieve?

The FORM E can achieve mirror-quality surface finishes down to Ra 0.1 µm (4 µin) using fine-finishing generator settings with copper electrodes. Typical production finishes for mold cavities range from Ra 0.4 to Ra 1.6 µm depending on the application and number of finishing passes.

06 Is the FORM E suitable for graphite electrodes?

Absolutely. The iSPG generator has dedicated technology settings for graphite electrodes, and the machine's dielectric filtration system handles graphite dust effectively. Many shops prefer graphite for its faster burn rates and lower electrode wear on roughing operations. Copper electrodes are still preferred for the finest finishes.