Forest-Line Atlas

$4,000,000 - $10,000,000 Updated 2026-03-17

Key Specifications

Spindle Power

32 kW to 60 kW (head configuration dependent)

Accuracy

±0.015 mm

Repeatability

±0.008 mm

x axis travel

Up to 40,000 mm (table length, engineered to order)

y axis travel

6,000 mm to 10,000 mm (crossrail width, configuration dependent)

z axis travel

1,500 mm to 2,000 mm (ram stroke)

Overview

The Forest-Line Atlas is a large-format 5-axis gantry machining center from Forest-Line Group, a Capdenac-Gare, France-based manufacturer that has built its entire product range around high-performance 5-axis machining centers for aerospace, defense, and energy applications. The Atlas represents Forest-Line's mid-to-large gantry configuration — positioned above the Alcor entry-level gantry and below the very largest custom portal systems Forest-Line produces for widebody aircraft structural work. The Atlas is characterized by a crossrail in the 6,000–10,000 mm range (configurable to project) and is designed to handle the primary structural panel and complex-component applications that define Tier 1 aerospace machining: wing ribs, fuselage frames, intercostal fittings, engine pylons, and large monolithic aluminum and titanium structural parts.

Forest-Line's engineering philosophy on the Atlas emphasizes simultaneous 5-axis machining performance — not just machine size. The Atlas gantry structure is designed for high dynamic stiffness, minimizing structural compliance during 5-axis contouring operations that place simultaneous lateral and torsional loads on the crossrail and Z-axis ram. The machine's thermally compensated structure uses sensors distributed across the machine to feed real-time compensation data to the Siemens 840D sl control, maintaining cutting accuracy despite thermal variations across the workshop day. Forest-Line uses hydrostatic or roller linear guidance on the Z-axis ram depending on configuration — hydrostatic guidance provides the best vibration damping and accuracy for finish machining of aerospace surfaces.

The Atlas spindle head architecture is based on Forest-Line's proprietary electro-spindle head units, available in multiple configurations for different material and application requirements. For aerospace aluminum structural machining — the dominant workload in Forest-Line's installed base — high-speed electro-spindle heads operating at 20,000–30,000 RPM with HSK-A63 tooling are standard. For titanium and hard aerospace alloy machining (engine pylons, structural titanium frames), Forest-Line offers high-torque heads with ISO 50 tooling interfaces and optimized speed/torque curves for aggressive titanium chip loads. The Atlas supports automatic head changing, allowing a single machine to shift between aluminum and titanium capability during a production program.

Forest-Line has a uniquely deep relationship with the Airbus supply chain — the company is headquartered in France near the Airbus Toulouse headquarters and has equipped a substantial portion of the Airbus primary structure manufacturing capacity across France, Germany, Spain, and the UK. This installed base provides Forest-Line with continuous application feedback that directly drives the Atlas's development and capability. The Atlas competes primarily against Fooke (Germany), Brötje Automation (Germany), MAG Giddings & Lewis (USA), and Fives Liné Machines (France) in the global aerospace structural machining market.

Full Specifications

Parameter	Value
X Axis Travel	Up to 40,000 mm (table length, engineered to order)
Y Axis Travel	6,000 mm to 10,000 mm (crossrail width, configuration dependent)
Z Axis Travel	1,500 mm to 2,000 mm (ram stroke)
A Axis	±110° (Forest-Line fork head)
C Axis	±200° or 360° continuous
Spindle Motor Power	32 kW to 60 kW (head configuration dependent)
Spindle Speed High Speed	Up to 30,000 RPM (aluminum electro-spindle)
Spindle Speed High Torque	Up to 10,000 RPM (titanium/steel head)
Spindle Interface	HSK-A63 (high-speed) or ISO 50 (high-torque)
Positioning Accuracy	±0.015 mm
Repeatability	±0.008 mm
Feed Rate	Up to 40,000 mm/min (rapid)
CNC Control	Siemens 840D sl with Forest-Line 5-axis cycles and thermal compensation
Guidance	Hydrostatic (Z-axis ram, finish-cut configuration) or roller linear (standard)

Specifications sourced from static.machinetools.com — verified 2026-03-28

Strengths & Limitations

Strengths

Forest-Line's deep Airbus supply chain relationship provides proven application credibility for aerospace structural aluminum machining that no other builder outside France/Germany can match at this scale
Automatic head changing capability allows a single Atlas machine to cover both high-speed aluminum structural work and high-torque titanium structural work within the same production program
Hydrostatic Z-axis ram guidance in finish-cut configurations provides the best vibration damping and accuracy for aerospace surface finish requirements on thin-wall aluminum panels
30,000 RPM high-speed electro-spindle capability is among the highest available in gantry machining centers, enabling high material removal rates in aerospace aluminum with short, rigid tool assemblies
Active thermal compensation distributed across the structure maintains cutting accuracy through the production day despite the thermal gradients inherent in large workshop environments

Limitations

Geographic service concentration — Forest-Line's primary engineering and service base is in France, which may result in longer response times for customers in North America, Asia, or Australia compared to customers in Western Europe
Engineered-to-order lead times of 18–36 months require early procurement planning — the Atlas is not available from stock and cannot address urgent production capacity requirements
Capital investment of $4M–$10M+ limits the addressable buyer pool to aerospace prime contractors, Tier 1 suppliers, and well-capitalized contract manufacturers — not accessible to smaller job shops regardless of their technical need

Best For

Airbus and Boeing Tier 1 structural component manufacturers producing wing ribs, fuselage frames, floor beams, and engine pylons from monolithic aluminum and titanium billets Aerospace defense contractors machining large structural titanium and aluminum components for military aircraft, satellite structures, and defense platform primary structure Large composite tooling manufacturers producing precision mold tools for aircraft wing, nacelle, and fuselage composite lay-up — where the Atlas's accuracy and surface quality meet composite tooling's demanding requirements European aerospace supply chain operations expanding machining capacity and looking for a French-engineered machine with strong Airbus application references and European service proximity

Frequently Asked Questions

01 Who makes Forest-Line machines and where are they built?

Forest-Line Group is a French machine tool manufacturer headquartered in Capdenac-Gare, in the Aveyron department of southern France. The company traces its origins to the French industrial tradition in large-format machining technology. Forest-Line machines are designed and built in France. The company's proximity to Airbus's Toulouse headquarters and its extensive supply chain has made it the dominant large gantry machining center supplier to the French aerospace sector. Forest-Line is a specialized company focused exclusively on large 5-axis machining centers — it is not a diversified machine tool manufacturer.

02 How does Forest-Line Atlas compare to Fooke Endura 904?

Forest-Line Atlas and Fooke Endura 904 are the most direct competitors in large aerospace gantry machining centers. Both produce engineered-to-order 5-axis portal machines for aerospace structural work in the 6,000–10,000 mm crossrail range. Forest-Line has a stronger Airbus supply chain reference base; Fooke has strong presence in German aerospace (Airbus Hamburg, Liebherr Aerospace) and rail vehicle manufacturing. Both are credible, well-established builders. Buyers typically evaluate both with application-specific reference visits — the decision often comes down to geographic service proximity, specific head configuration preferences, and project-level commercial terms.

03 What materials does the Forest-Line Atlas machine?

The Atlas machines aluminum alloys (7xxx and 2xxx series aerospace alloys — the dominant workload), titanium alloys (Ti-6Al-4V and similar), stainless steel, carbon fiber reinforced polymer (CFRP) trimming and machining, and tooling steels for mold applications. Aluminum structural machining is the primary use case for most Atlas installations given Airbus and Boeing's heavy aluminum structure programs. Titanium capability is served by Forest-Line's high-torque head options. CFRP trimming requires appropriate spindle speed, dedicated composite cutting tools, and dust extraction provisions — confirm with Forest-Line for composite-specific configurations.

04 Does the Forest-Line Atlas support pallet changing or automated workpiece handling?

At Atlas scale, standard automatic pallet changers are not applicable — aerospace structural panels and large monolithic parts are handled by overhead cranes and specialized fixture systems. Forest-Line can integrate the Atlas with rail-based workpiece transfer systems, multiple-fixture setups for continuous production, and interface provisions for customer-specified crane and handling systems. Workpiece handling automation is engineered as part of the production system project rather than as a standard catalog option. Forest-Line's application engineering team participates in production system design during the project definition phase.

05 What control system does the Forest-Line Atlas use?

The Forest-Line Atlas uses the Siemens 840D sl CNC platform with Forest-Line's proprietary 5-axis cycle library and thermal compensation software. The Siemens 840D sl is the dominant control in high-end European 5-axis machining centers and is the preference of most aerospace manufacturing customers globally. Forest-Line's proprietary cycle library extends the standard 840D sl functionality with aerospace-specific 5-axis contouring cycles, adaptive feedrate control, and head calibration routines. RTCP (Rotary Tool Center Point) transformation is standard for all 5-axis contouring operations.