Heavy Simple Ferrule 145 – (NO Trigger, ErmesSub-Compatible) with Stainless Steel Accessories

Heavy Simple Ferrule 145 – (NO Trigger, ErmesSub-Compatible) with Stainless Steel Accessories

The model presented here was developed for deep-sea fishing of large prey... it is a massive speargun capable of absorbing the substantial recoil caused by multi-band configurations.
With a 115 cm shaft travel, it is not suitable for all types of fishing, but it is ideal for stable, well-placed shots.

3D Model for Speargun and Handle

Designed for engraving on exotic hardwoods such as teak, iroko, and mahogany.
The included files also come in .STEP and .STL formats for accessories, which can be 3D printed or CNC-machined in plastic materials such as Delrin.

Included DXF Projects

Among the various DXF files, you will also find:

• Covers for ballast compartments
• Accessories for the muzzle
• Plates for the handle
• Plates for the butt

All DXF files are accompanied by technical drawings in PDF format, including instructions and dimensions for sheet metal bending and other machining processes.

The DXF files can also be used for CNC cutting on carbon fiber s if you prefer to produce fold-free accessories.

Speargun Construction

The 3D model is intended for engraving on hardwoods. The use of 3- or 4-flute wood-specific milling cutters is recommended.
Using generic bits or those designed for metal/plastic may cause chipping or imperfections.

With a 145 cm shaft travel, the speargun is not suitable for all types of underwater fishing, including ambush-style hunting.

Important Note – ErmesSub Trigger Compatibility

The speargun is compatible with two ErmesSub trigger systems: Swings Double Roll and Future, including the more compact Future Double Roll.
Although the project was initially designed for the LDpro3D trigger system, the external dimensions are highly compatible with ErmesSub triggers as well.
As shown in the photos, structural compatibility is excellent.
Installing the ErmesSub Swings or Future systems requires only minor, non-invasive modifications that do not significantly alter the original design.
If you opt to use the LDpro3D trigger system, we strongly recommend purchasing the full set of files to ensure proper assembly and operation of the mechanism.

Important Note – Wood Preparation

Pay close attention when preparing the laminated wood to be used for engraving the speargun.

The structure of the speargun does not require any special considerations for its construction.
Due to its size, it can be made from laminated wood of a single type, without alternating soft or light woods.
Always use hardwoods like iroko, teak, and mahogany for the strips, glued with D4 polyurethane adhesive.

It is designed with a ferrule-type muzzle that allows quick band changes, even in the water.
The speargun can accommodate 3 large bands (such as triple 18 mm), but if using a double-wrap shooting line, it can also fit 4 or more.

Conventional Propulsion System and Performance

Personally, I’ve used the previous model with three Sigal Extreme 17.5 mm bands and was extremely satisfied with both the shot and the penetration power.
Thanks to its unique shape, the bands are neatly arranged without overlapping, avoiding obstruction of the line of sight. The shape also contributes to excellent handling and reduces vibration in lateral and vertical movements.
To reduce bulk, vertical reels are recommended.
It can accommodate a 9 mm shaft.
This model requires turned Delrin bushings for the muzzle ages (see photos), which protect the wood during band loading (as Dyneema can damage the wood).

Handle Finishing

Once engraved, the handle is ready for assembly.
The only manual operation required:
Sanding and shaping the grip saddle where the parts are glued together (highlighted in pink in the photos). This part is left unshaped to allow the to adapt it to their own hand anatomy.

Three grip sizes are included (small, medium, large).

The handle can also be engraved on plastic materials such as Delrin or glass-filled nylon. In this case:

• Do not use epoxy resins
• Use D4-grade polyurethane adhesives for optimal bonding
• Sand plastic surfaces before gluing

Main Dimensions of the Model:

• Muzzle height: 40 mm
• Muzzle width: 50 mm
• Maximum width at belly: 88 mm
• Maximum height at belly: 45 mm

Included Files (STEP, STL, and DXF formats):

• Speargun
• Handle (3 sizes)
• Handle plate
• Butt plate
• Ballast compartment covers
• Line guide
• Muzzle line stopper

Included Technical Drawings (PDF):

• Muzzle accessories

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