Serpent Tête Métallique 90

Snake Metal Head 90– Compactness and Precision in a Slim Body

The Snake model represents the perfect balance between compactness, handling, and performance. Designed to offer maximum control in any situation, it is the slimmest speargun in the entire catalog. Its streamlined design maximizes maneuverability, making it ideal for spearfishing in tight spaces or obstacle-rich environments.

Technical Note: Bending must for the K-factor, bend radii (never less than metal thickness), and material stretch/compression coefficients.

Compact yet powerful, the Snake’s balanced body provides exceptional stability when firing, ensuring accurate trajectories even during quick movements.

Designed to suit both beginners and experienced divers, the Snake stands out for its ergonomic handle, engineered for a firm and comfortable grip, even during long fishing sessions.

The combination of lightness, stability, and power makes the Snake an excellent choice for those seeking a versatile, fast, and reliable speargun for any underwater hunting technique.

Metal Head Features

The stainless steel muzzle allows for parallel alignment of the rubbers with the shaft, avoiding energy loss caused by oblique traction that creates damaging friction on the shaft guide.
Designed to accommodate two pairs of rubbers (up to 17 mm in diameter), it includes an integrated line guide that becomes visible after proper metal bending.
A line stop is also included, to be mounted as a washer behind the nut that secures the shaft wishbone (not shown in the drawings).

3D Model for Speargun and Handle

Designed for milling on exotic woods such as teak, iroko, and mahogany. The package includes .STEP and .STL files for all accessories, compatible with 3D printing and CNC machining on plastic materials like Delrin.

Included DXF Projects

The package includes the complete professional trigger system with quick-release "cam" plates in DXF format, ideal for stainless steel laser cutting. Other included DXF files:

• Lead compartment covers
• Muzzle accessories
• Handle mounting plates
• Butt plates
• Metal Head muzzle

All files come with detailed technical drawings in PDF format, including step-by-step instructions for bending and machining.

The DXF files allow for accessory fabrication via laser cutting on stainless steel or CNC milling on carbon fiber s—ideal for flat parts that do not require bending.

Speargun Machining

This model is optimized for carving in solid wood. It is recommended to use 3- or 4-flute cutters designed for wood. Improper tools may compromise the quality of the cut.

With a shaft stroke of 90 cm, the speargun is suitable for all freediving techniques, including ambush and cave hunting.

Trigger System – Precision and Safety

Engineered with micron-level tolerances, the trigger mechanism ensures maximum safety and reliability. Laser cutting must be carried out by qualified technicians to prevent malfunctions or accidental firing.

The trigger housing must be bent with extreme precision; any misalignment can compromise its operation.

Recommended materials for internal components:

• AISI 316 (not 316L)
• AISI 316Ti
• AISI 420
• AISI 440C
• AISI 630

Use of AISI 304 stainless steel (18/10 or 18/8) is discouraged due to its low hardness and poor mechanical wear resistance.

Strength test: the trigger system successfully withstood a static load of 280 kg for 48 consecutive hours without failure.

Important Note – Wood Preparation

The speargun’s structure is particularly slim. It is recommended to use a lightweight laminated blank with Okoumé strips to reduce weight and ensure proper buoyancy, preventing sinking.
Use hardwoods such as teak, iroko, or mahogany for the central and lateral layers.
A central strip of 15 mm hardwood is recommended.

Recommended configurations:

• 2 pairs of medium-diameter rubbers (14–17 mm)

The rubbers run underneath the barrel, while the Dyneema shooting line stays on top, improving handling and swing speed.

Handle Finishing

After milling, the speargun is ready for assembly.

The handle can also be made from Delrin or glass-filled nylon. In that case:

• Avoid using epoxy resins
• Use polyurethane adhesives (class D4)
• Sand with 40-grit to create deep grooves on bonding surfaces

Included Files (STEP, STL, DXF formats):

• Speargun body
• Handle (size M–L)
• Handle plate
• Butt plate
• Threaded lead inserts
• Lead compartment covers
• Professional trigger system
• Cam plates
• Muzzle line stopper

Included Technical Drawings (PDF):

• Trigger system
• Muzzle accessories
• Metal Head muzzle

Technical Note:
Specifications and parameters for laser cutting and CNC milling depend on the type of machine and the operator’s preferences.
Standardized settings cannot be provided without knowing the equipment used.