Heli-coil 8552-4-15 Front End Assembly Tool 1/4-28 Unf

Product Description

The HELI-COIL 8552-4-15 is a front end assembly designed for use with power installation tools in thread insert applications. It is engineered to work with strip feed inserts, allowing technicians to drive Heli-Coil thread inserts rapidly and consistently using a power driver rather than a manual hand tool. The assembly is sized for 1/4-28 UNF thread, a fine-pitch unified thread standard commonly encountered in precision mechanical and light-duty structural assemblies. This component is installed and used by machinists, maintenance technicians, and field service professionals who need repeatable thread repair or thread insert installation at production or high-volume service rates.

This front end assembly is suited for use in manufacturing, maintenance, and repair operations where stripped or damaged 1/4-28 UNF threads require restoration. Strip feed insert compatibility makes it appropriate for bench-top or handheld power driver setups where inserts are fed from a continuous strip rather than loaded individually. Typical applications include light machinery, automotive components, aerospace fixtures, and general metal fabrication where threaded insert installation speed and consistency are priorities.

Key Features

• Sized for 1/4-28 UNF thread standard for precise insert placement
• Front end assembly configuration attaches to compatible power installation tools
• Compatible with strip feed inserts for continuous, high-rate installation
• Designed to deliver consistent insert depth and engagement without manual torque variation
• Supports thread repair and thread insert installation in metal substrates

Compatibility

Designed for use with HELI-COIL power installation tools that accept front end assembly attachments, and compatible with strip feed thread inserts in 1/4-28 UNF sizing.

Installation Notes

Installation of this front end assembly should be performed by a qualified machinist or maintenance technician familiar with thread insert tooling. Ensure the power installation tool is fully de-energized and disconnected from its power source before attaching or removing the front end assembly. Verify that the strip feed insert size and thread pitch match the prepared tapped hole before beginning insert driving operations. Follow the tool manufacturer's guidance for proper assembly torque and feed settings.