Kona-style fishing bait head trolling lure

This model represents a streamlined trolling lure head inspired by classic Kona bait geometry. The cylindrical body with tapered front profile is designed to provide stable tracking and consistent movement in the water. Side holes are included to allow water flow and pressure balance, contributing to lure action and reducing unwanted spin. A central axial hole is provided for line or leader passage.
 

The bait head is intended to be used as a modular component. For proper operation, it must be combined with a rubber squid/octopus skirt or feathers mounted behind the head. The flexible skirt or feather assembly provides the visual attraction and motion required to effectively target pelagic species.
 

The design can be uniformly downscaled to create smaller versions suitable for lighter tackle or smaller target fish, while preserving the overall hydrodynamic shape.

This lure is provided in two versions: a standard version and a weight-adjustable version.

The weight-adjustable version features four cylindrical cavities inside the head. Each cavity can hold up to three 5 mm fishing split shots (1 g each), for a total additional weight of up to 12 g (3 × 4).

The print is designed to pause automatically once the hollow cylinders are completed. This allows time to insert the weights. After insertion, the print can be resumed to seal the cavities.

The cavities have been intentionally designed with a slightly loose fit to accommodate weights of slightly different sizes. If you consider the internal movement of the weights to be an issue, it is recommended to glue them in place before resuming the print.

If you choose to use fewer cavities, they must be used symmetrically. You can use all four, or only two as long as they are mirrored. Otherwise, the lure may lose balance and proper alignment. It is also possible to use less weight per cavity, accepting increased internal movement or securing it with adhesive.

If the head is printed at a reduced scale, the cavity size will decrease accordingly. Therefore, the size of the weights should be adjusted to match the scaled dimensions. The weight can be slighty changed also printing with a different infill percentage.
 

The model has been successfully printed in PLA for prototyping and light use. However, for real fishing conditions, materials with higher impact resistance, temperature stability, and water durability—such as PETG, ASA, ABS, or nylon—are recommended. Post-processing (sanding, polishing, or coating) can further improve surface finish and water flow.
 

This bait head is suitable for experimentation, customization, and color variation, allowing anglers to tailor lure size, weight, and appearance to specific fishing conditions.