CNC milling machines SG-3

3-axis gantry CNC milling machine/ Aplications

/ Materials

Description

3-axis gantry CNC milling machine

The SG-3 is the 3-axis gantry CNC milling machine in BERMAQ's SG line, designed to machine polystyrene, wood, plastics and resins for model production. Its gantry architecture, with a moving bridge on side columns, provides rigidity and stability throughout the process.

Built for the most demanding work in model making, marine and set design, its modular design allows heads, tool magazines and measuring systems to be combined so the machine matches each customer's needs.

Applications of the SG-3 milling machine

Marine model making, set design and 3-axis patterns

The SG-3 is designed for workshops that turn blocks of soft and semi-hard materials into models, patterns and custom parts with precise finishes:

Marine: models and lightweight structures for boats, from the design phase to the final pattern.
Moulds and models: patterns for thermoforming and casting, scale models and prototypes of new designs.
Set design and art: scenery, sculptures and elements for film production and events.
Construction, architecture and interiors: architectural models, decorative elements and bespoke furniture pieces.
Rail: models, prototypes and lightweight parts for rolling stock projects.

Standard equipment of the SG-3 milling machine

Gantry with a moving bridge on side columns

On the SG-3 the bridge travels lengthwise on the columns (Y axis) and the head carriage moves across the bridge from left to right (X axis). This architecture distributes masses more effectively and offers superior structural rigidity, which translates into stability during machining and accuracy over large surfaces.

Rack and pinion on X and Y, preloaded ball screw on Z

The X and Y axes are driven by rack and pinion, with an optional dual servo motor in master-slave configuration, while the Z axis uses a preloaded ball screw for maximum depth accuracy.

Linear tool changer with up to 12 positions under the bridge

The linear magazine located under the bridge holds up to 12 tools, so roughing, finishing and auxiliary operations run one after another without operator intervention, optimising production time.

HEIDENHAIN TNC 640 or SIEMENS 840D sl CNC with electronic handwheel

The machine is fitted with a HEIDENHAIN TNC 640 or SIEMENS 840D sl control, an electronic handwheel for set-up and an air-conditioned electrical cabinet that protects the electronics in demanding industrial environments. Automatic lubrication completes equipment designed for reliable production.

Design and construction of the SG-3 milling machine

Phenolic resin table for stable workholding

The phenolic resin worktable offers a stable, durable surface for fixing blocks and boards. Combined with the available vacuum pump, it keeps parts securely held during machining.

Full enclosure with front loading doors

The SG-3 can be supplied fully enclosed, with front doors that make loading and unloading easy. The enclosure increases safety and protects the working environment without reducing accessibility.

An SG-3 built to suit each process

Like all BERMAQ milling machines, the SG-3 is designed with parametric 3D software and built piece by piece by the company's technicians, so heads, options and configuration can be adapted to each production process.

Configure the SG-3 for your model shop

Measuring, cooling and tool magazines to suit your process

Non-contact tool measurement: automatic tool setting and breakage detection to avoid defective parts.
Wireless touch probe: more accurate part measurement and referencing.
Tool cooling and vacuum pump: thermal control of the cut and firm workholding.
Automatic tool changer: capacities of 10, 12, 30 or up to 40 positions and a choice of milling heads.
Master-slave dual servo and full enclosure: reinforced gantry drive and greater safety at the workstation.

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Materials compatible with the SG-3 milling machine

Polystyrene, wood and resins with a model-quality finish

The SG-3 is optimised for fast-machining materials, where the rigidity of the gantry translates into clean surfaces that stay true to the design:

Polystyrene and foams: large models, scenery and scale models with fast roughing.
Wood and boards: patterns, casting models and bespoke furniture pieces.
Plastics: parts, scale models and design prototypes with crisp edges.
Resins and polyurethane: models and patterns for thermoforming with a uniform finish.

Advantages of the SG-3 3-axis gantry

The gantry structure works over large surfaces without compromising accuracy and can integrate several heads or tools. On the SG-3, this base is combined with 3-axis kinematics that are simpler to program, ideal when the part does not require the tool to tilt and the priority is production speed and surface quality.

The SG-3 within BERMAQ's SG line

The SG line brings together BERMAQ's gantry milling machines. The SG-3 is the 3-axis version, while models such as the SG-5, SG-A and SG-XXL add rotary A and C axes for 5-axis machining, with working areas that reach 60,000 mm in length on the SG-XXL. All share the same construction philosophy, making it easy to move up the range as production grows.

Designed and built by BERMAQ, with close support

The SG-3 is manufactured entirely in Spain with EU parts. BERMAQ's team supports the customer from technical definition to commissioning, with online or on-site training, preventive maintenance packages, a stock of original spare parts and a network of specialised technicians who resolve any incident as quickly as possible.

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