Threaded mandrel prewinders are best suited for easy and fatigue free installation of inserts.
Helicoil prewinder is avaliable as both plain slotted and threaded mandrel captive and non-captive tools ranging from size M1.6, M2-M39 and in UNC/UNF catagory from 1-64 to 1-1/2.
Threaded mandrel prewinder are also best recommended for successful installation of screw locking inserts and free running inserts having a fine thread pitch.