HELI-COIL Insert Installation Tool: Prewinder Type II, Helical Inserts

The HELI-COIL Prewinder Type II is a steel installation tool used to prewind helical inserts into metric coarse right-hand threads. It ensures proper thread engagement during repair or reinforcement of tapped holes in industrial applications like machining and automotive assembly.

The HELI-COIL Prewinder Type II (MPN 7751-3) is a steel tool for helical inserts. It is metric, compatible with coarse right-hand threads, and designed specifically for HELI-COIL brand inserts. It is not a general-purpose tool but a dedicated prewinder for accurate installation.

3G Electric supplies the HELI-COIL Prewinder Type II (MPN 7751-3) worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this installation tool to your facility, ensuring you get the right part for helical insert repairs.

To install helical inserts, first tap the hole to the correct metric coarse thread. Then place the insert on the Prewinder Type II tang and rotate the tool clockwise to wind the insert into the hole. After installation, break off the tang with a punch. Always follow HELI-COIL instructions for torque and depth.