Heli-coil 7571-02-3B Unc Mandrel Thread Insert Tool

Product Description

The HELI-COIL 7571-02-3B is a mandrel-type power installation tool designed for driving threaded wire inserts into pre-tapped holes. Built for the 2-56 UNC thread size, this tool accepts both bulk inserts and strip feed inserts, making it compatible with a range of HELI-COIL installation workflows. The mandrel engages the tang of the wire insert and rotates it into the receiving hole under power, reducing installation time compared to hand-driver methods. It is used by machinists, maintenance technicians, and assembly professionals who need fast, consistent thread repair or thread reinforcement in metal and other materials. The tool weighs 0.44 pounds, keeping it manageable during repetitive production or field use.

This tool is suited for applications requiring 2-56 UNC thread insert installation in production assembly lines, MRO (maintenance, repair, and operations) environments, and machine shop settings. The mandrel drive design is intended for use with a compatible power driver or drill, speeding up insert placement when high-volume installation is required. Both bulk insert loading and strip feed insert loading are supported, giving technicians flexibility depending on which insert format is on hand.

Key Features

• Designed specifically for 2-56 UNC thread size wire insert installation
• Mandrel drive type accepts both bulk inserts and strip feed inserts
• Power installation tool style reduces installation time in production and repair applications
• Lightweight at 0.44 pounds for extended use without fatigue
• Thread standard: UNC, consistent with standard inch-series fastener specifications

Compatibility

Compatible with bulk inserts and strip feed inserts in the 2-56 UNC thread size. Designed as a power installation mandrel tool for use within the HELI-COIL thread insert system for 2-56 UNC applications.

Installation Notes

Installation should be performed by a qualified machinist or assembly technician familiar with threaded insert installation procedures. Before use, confirm the receiving hole has been properly tapped to the correct HELI-COIL tap size for 2-56 UNC. Secure the workpiece to prevent movement during power-driven insert installation. Follow the tool manufacturer's torque and speed guidelines for the power driver being used to avoid over-driving the insert or damaging the mandrel.