Pretensioning Plane Hook

Pre-Tensioning Hook - Sigalsub

The Sigalsub pre-tensioning hook is an essential component for anyone looking to convert or optimize their speargun into a roller or reduced-load configuration. Made from burnished stainless steel, it ensures maximum corrosion resistance in marine environments and long-lasting durability.

Function and Compatibility

This flat hook attaches to the underside of the barrel of an arbalete speargun and allows pre-tensioned bands to be anchored. It is compatible with wood, aluminum, and composite barrels, with a mounting system that can be screwed directly into the barrel or installed using bushings. By installing multiple hooks in sequence along the barrel, you can vary the pre-tensioning point and the position of the bands, quickly managing the speargun’s power according to your spearfishing needs.

Technical Features

• Material: burnished stainless steel, resistant to marine corrosion
• Mounting: screws directly into the barrel or installs using bushings
• Hardware included: 2 stainless steel screws supplied
• Compatible with roller, inverter, and reduced-load systems
• Allows textile and metal wishbones to be anchored for band pre-tensioning
• Can be positioned anywhere on the barrel to adjust tension and power
• Made in Italy by Sigalsub

Installation Instructions

1. Position the hook at the desired point on the speargun barrel.
2. If necessary, first insert the bushing into the barrel before drilling.
3. Drill the barrel, making sure the hole is in the correct position and away from any seals.
4. Secure the hook using the two stainless steel screws supplied.
5. Hook the pre-tensioned bands onto the hook to complete the roller or reduced-load system.

System Advantages

By distributing an adequate number of hooks along the barrel, you can split the band loading process into stages, making the top loading phase easier and reducing overall effort. This solution lets you quickly customize speargun performance without modifying other components, making it ideal for spearfishers who want to adapt the power of their arbalete speargun to different hunting situations.