Heli-coil 18551-04-2 Replacement Blade 4-40 Unc Thread Insert Tool

Product Description

The HELI-COIL 18551-04-2 is a replacement blade designed for use with HELI-COIL power installation tools for threaded inserts. This blade is matched to the 4-40 UNC thread size and is the consumable cutting and driving component that engages the insert during powered installation. When the working blade on a power tool wears or breaks, this part restores full tool function without requiring a complete tool replacement. It is used by machinists, maintenance technicians, and assembly professionals working with threaded insert repair and installation in metal, plastic, or composite base materials.

This replacement blade is suited for production and field repair environments where 4-40 UNC threaded inserts are installed at volume using power tooling. It is compatible with both bulk inserts and strip feed inserts, making it a versatile service part for operations that use either insert format. Typical applications include aerospace assembly, industrial maintenance, and precision manufacturing where thread repair or new thread installation is part of the workflow.

Key Features

• Matched to 4-40 UNC thread size for precise insert engagement
• Compatible with both bulk inserts and strip feed inserts
• Restores power installation tool function without full tool replacement
• Lightweight at 0.1 pounds for easy handling and storage
• Direct OEM-style replacement blade for HELI-COIL power installation tooling

Compatibility

Compatible with HELI-COIL power installation tools configured for 4-40 UNC thread size. Supports use with bulk inserts and strip feed inserts as stated in the product specifications.

Installation Notes

Blade replacement should be performed by a qualified technician familiar with HELI-COIL power tooling. Power down and disconnect the installation tool from its power source before removing or installing the blade. Follow the tool manufacturer's service instructions for blade retention and seating to ensure proper insert drive engagement during operation.