Kit de bouche en acier inoxydable avec poignée et mécanisme de déclenchement professionnel

Handle

Ergonomic Handle with Stainless Steel Trigger Mechanism – 3D Printed for Spearguns

General Description

This ergonomic handle is designed to offer a comfortable, secure, and natural grip. The shape follows the anatomy of the hand, with a dedicated seat for the middle finger and a specific recess for the ring and little fingers, ensuring stability even when wearing 5 mm gloves.

Although the default size is Medium-Large, the slim profile allows comfortable use even for s with smaller hands.

The handle features a reversible line release integrated into the trigger mechanism and includes a mounting bracket for action cameras. The internal structure is hollow, allowing for the insertion of foam to balance negative or heavy buoyancy and convert it into positive. Additionally, the inner cavities help reduce the overall weight of the handle.

The trigger guard is optimized for vertical reel installation, with a base designed to minimize screw clutter and ensure a stable attachment. The rearward position of the reel improves handling and frees up the front section of the speargun.

The t includes a seat for a double o-ring, ensuring a watertight seal with the barrel. The locking pin housing is enclosed in a cylindrical chamber to prevent water infiltration.

An integrated band hook is included, designed for securing rubbers in roller and pulley configurations. The housing is compatible with various types of Dyneema wishbones.

Compatibility:
Suitable for tubes with 26 mm internal diameter (ID) and external diameters (OD) between 28 mm and 31 mm, made of carbon fiber or aluminum.

Why Buy This Project?

A professional, high-quality handle can cost between \$50 and \$80.
With this project, you can 3D print custom handles for personal use at a cost of just \$7–8 per unit, offering significant savings and maximum customization freedom.

Muzzle Stainless Steel x4

Specifications of the Muzzle Stainless Steel x4

Muzzle Specs
The muzzle is designed to be as simple and lightweight as possible. Its compact size does not compromise the weapon’s handling.
The t includes 2 o-ring seats to ensure a watertight seal with the barrel, while the stop seat is isolated inside a cylindrical chamber to prevent water infiltration.
The muzzle is compatible with tubes having a 26 mm internal diameter (ID) and outer diameters (OD) between 28 mm and 31 mm, making it suitable for all commercial tubes, both carbon and aluminum.

Stainless Steel Block

The stainless steel muzzle allows for parallel rubber alignment with the shaft, avoiding energy loss caused by oblique traction that generates harmful friction on the shaft guide.
Designed to hold two pairs of rubbers (up to 18 mm in diameter), it includes a built-in line guide.
A line stop is also included, to be mounted as a washer behind the nut securing the metal shaft wishbone (not shown in the drawings).
The muzzle must be cut from a sheet of AISI 304 or AISI 316 steel, with a thickness of at least 5 mm (6 mm is even better).

Muzzle Body Structure
The muzzle body cannot be 3D printed. It must be machined from solid Delrin stock using a CNC lathe; experienced s may opt for manual lathe work.

Muzzle Assembly
The muzzle body must be press-fitted into the stainless steel component. The metal part has a 22 mm ID hole, while the muzzle body has a 22.5 mm OD.
The parts are press-fitted, and once inserted, will be permanently locked—especially when machined from solid Delrin or fiber-reinforced Nylon.

Professional Trigger Mechanism

The trigger system is manufactured with extremely precise tolerances (within hundredths of a millimeter), ensuring maximum safety, accuracy, and reliability.

Warning:
Laser cutting must be performed only by experienced professionals. Errors in cutting or bending may compromise functionality and cause accidental firing.

Recommended materials for internal mechanical components:

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

Avoid using AISI 304 stainless steel (e.g., 18/10 and 18/8), due to its low hardness and poor wear resistance.

Tested under static loads of 280 kg for 48 continuous hours.
No liability is assumed for damage caused by improper manufacturing.

3D Printing Instructions

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

Recommended materials:

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

Test Results with Reinforced Nylon:

• 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)

Type	Density (g/cm³)	Key Properties
PA6	1.13	Standard Nylon 6
PA6-CF	1.20–1.30	Carbon fiber reinforced
PA6-GF15	1.21–1.27	Reinforced with 15% glass fiber
PA6-GF30	1.35–1.45	Reinforced with 30% glass fiber
PA12	1.01	Low water absorption, floats in water
PA12-CF	1.00–1.10	Lightweight, dimensionally stable
PA46	1.20	High heat resistance
PA66	1.14	Standard Nylon 66

Note: PA12 is ideal for submerged environments due to its low water absorption (0.25–0.3%) and density 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)

An excellent material for underwater use due to its lightweight, buoyancy, and impact resistance.

Key Properties:

• Water absorption: nearly zero (<0.03%)
• High flexibility and good wear resistance
• Poor bed adhesion during printing (requires adhesives or special plates)
• Significant shrinkage and warping 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, rigidity, 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.