Гибридный комплект для трубки 30-31 мм с рукояткой и профессиональным спусковым механизмом

Hybrid for 30–31 mm Tubes – With Professional Trigger System and Stainless Steel Accessories

Hybrid Speargun – Compactness and Precision in a Slim Body

The Hybrid model represents the perfect balance between compactness, maneuverability, and performance.
Designed to offer maximum customization freedom, it allows the creation of a speargun in any desired length, with a barrel of your choice—either aluminum or carbon—and a wooden rear section featuring a professional trigger system.

Modern yet balanced, the Hybrid’s well-designed body ensures exceptional shooting stability, delivering accurate trajectories even during fast movements. The included triple-hole muzzle can accommodate up to two pairs of 16 mm bands, allowing power adjustment based on the fisherman's needs.

Suitable for both beginners and experienced divers, the Hybrid stands out for its ergonomic grip, designed for a firm and comfortable hold, even during extended spearfishing sessions.

The barrel is encased in wood and can be secured with either 2 pins or adhesive only, depending on customer preference.
The wooden section accommodates barrels with a 2.30 mm offset, the most commonly used offset for tube barrels.
Underneath the wooden belly, there is a mounting slot for a reel, whether vertical or horizontal.

3D Model for Speargun and Handle

Designed for milling in 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 in 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:

• Trigger system
• Action cam mount
• Handle mounting plates
• Butt plates

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

The DXF files allow accessories to be made via laser cutting in stainless steel or CNC milling from carbon fiber sheets, ideal for flat parts that do not require bending.

Speargun Machining

This model is optimized for engraving on hardwood. We recommend using 3- or 4-flute cutters specifically for wood. Using inappropriate tools may compromise cut quality.

Trigger System – Precision and Safety

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

The bending of the trigger housing must be extremely precise; any misalignment could compromise functionality.

Recommended materials for internal components:

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

The use of AISI 304 stainless steel (18/10 or 18/8) is strongly 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 structure of the speargun does not present specific mass or balance constraints. It is possible to use a laminated blank made entirely from a single wood type, such as teak or iroko, without negatively affecting buoyancy or balance.
Laminated wood with 15 mm strips is recommended to better distribute wood stress and make the structure more rigid.

Recommended configurations:

• 2 pairs of medium-diameter bands (15–17 mm)
• or 3 pairs of small-diameter bands (14 mm)

Handle Finishing

After milling, the speargun is ready for assembly.

The handle can also be made from Delrin or glass-filled nylon. If so:

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

Included Files (STEP, STL, DXF formats):

• Speargun body
• Handle (M–L size)
• Handle plate
• Butt plate
• Professional trigger system
• Action cam mount plates

Included Technical Drawings (PDF):

• Trigger system with action cam mount

3D Printing Instructions for Muzzle

• Infill: 100% (solid structure, no internal cavities)
• Enclosed print chamber required

• Recommended materials:

  • ASA
  • PA6-CF
  • PA6-GF30
  • PA12-CF
  • PEEK

Reinforced Nylon Test Results:

• PA6-GF15 (1.21–1.27 g/cm³): final weight approx. 270–280 g
• PA6-GF30 (1.35–1.45 g/cm³): final weight approx. 290–300 g

Recommended CNC Materials

Nylon (PA)

Note: PA12 is ideal for underwater use due to its low water absorption (0.25–0.3%) and its density being lower than seawater, making it buoyant.

Other Technical Materials

Delrin (POM)

• Delrin 150 / 100 / 527UV: 1.41 g/cm³
• Delrin 570 (glass fiber): 1.42 g/cm³

Teflon (PTFE)

• Teflon G (15–25% glass): ~1.50 g/cm³
• Teflon GF (glass + graphite): ~1.60 g/cm³
• Teflon C (25% carbon): ~1.55 g/cm³

Other Polymers

• ASA: ~1.07 g/cm³
• PEEK: ~1.30–1.32 g/cm³
• Polypropylene (PP): 0.89–0.91 g/cm³

Polypropylene (PP)

Excellent material for underwater use due to its lightness, buoyancy, and impact resistance.

Key Properties:

• Water absorption: almost zero (<0.03%)
• High flexibility and good wear resistance
• Difficult to adhere to the print bed (requires special adhesives or dedicated surfaces)
• Significant shrinkage and deformation during printing

Reinforced Variants:

• PP-CF: carbon fiber reinforced, very rigid but expensive
• PP-GF: glass fiber reinforced, more affordable and durable

However, reinforced nylon is recommended as the best compromise between cost, stiffness, and mechanical strength.

WARNING:
This project is intended for private and recreational use only.
ed under the domain LDpro3D, owned by Lombardo Davide.
Any commercial reproduction is strictly prohibited.
Violations will be prosecuted under the law.

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.