Kit de focinho de demonstração com pega e mecanismo de gatilho profissional

Grip

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

General Description

This ergonomic grip is designed to provide a comfortable, secure, and natural hold. The shape follows the anatomy of the hand, with a dedicated seat for the middle finger and a specific recess for the ring and pinky 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 grip includes a reversible line release integrated into the trigger mechanism and a mount for action cameras. The internal structure is hollow, allowing the insertion of foam to balance a negatively or heavily weighted setup and convert it into a positive one. Additionally, the inner cavities help reduce the overall weight of the grip.

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

The t includes a double O-ring seat, ensuring the tube is watertight. The locking pin housing is isolated within a cylindrical chamber to prevent leaks.

An integrated band tensioner is included, designed for roller and pulley rubber configurations. The housing is compatible with various Dyneema wishbone types.

Compatibility:
Fits tubes with an inner diameter (ID) of 26 mm and outer diameter (OD) between 28 mm and 31 mm, in carbon fiber or aluminum.

Why Purchase This Design?

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

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Reduced-Pulley Muzzle

Specifications of the Reduced-Pulley Muzzle with Stainless Steel Inserts

Muzzle Specifications
The muzzle is designed to be as simple and lightweight as possible. Its compact dimensions do not compromise the weapon’s maneuverability.
The t features 2 O-ring seats to ensure the tube is watertight, while the stopper seat is isolated in a cylindrical chamber to prevent water intrusion.
The muzzle fits tubes with an inner diameter (ID) of 26 mm and outer diameter (OD) between 28 mm and 31 mm, making it suitable for all commercially available tubes in carbon or aluminum.

Stainless Steel Inserts for the Muzzle
The muzzle includes an integrated stopper and stainless steel side guides, to be laser-cut and press-bent.
The stopper is a single stainless steel rod ing through the muzzle, which also s the side plates. It stops the shooting line at the Dyneema wishbone knot, maximizing shaft travel and keeping the muzzle free of visual obstructions.
The side guides are very compact and equipped with line retainers.
The reel line guide plate is also compact and secured with two screws underneath the muzzle.

Muzzle Structure
The muzzle structure can be 3D printed (see material specifications) or machined from solid Delrin rod via CNC; experienced s may also work it on a lathe or milling machine.

Pulleys
The pulleys are included in the 3D printing files, but like the muzzle body, they can also be made manually using a lathe or CNC lathe.

Additional Features
Near the tube stop housing, there is a through-hole that allows the insertion of an extra rubber in bushing mode.

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Professional Trigger Mechanism

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

Warning:
Laser cutting must be performed only by skilled 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 or 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.

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3D Printing Instructions

• 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

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Recommended CNC Materials

Nylon (PA)

Type	Density (g/cm³)	Key Features
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 underwater use due to its low water absorption (0.25–0.3%) and its density being lower than seawater, making it buoyant.

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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

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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.

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.