Heli-coil 535-18 Thread Insert Hand Installation Tool 1-1/8-12 Unf

Product Description

The HELI-COIL 535-18 is a hand installation tool designed for installing thread inserts into 1-1/8 - 12 UNF threaded bores. It uses a Type IV Non-Captive Prewinder mechanism, which winds the coil insert onto the prewinder mandrel before driving it into the prepared hole. The tool features a spinner diameter of 2 inches and a prewinder length of 3-1/16 inches. It is intended for bench or field use by machinists, maintenance technicians, and mechanical tradespeople working with HELI-COIL thread repair and thread reinforcement applications. No power source is required - this is a fully manual hand tool.

This tool is used wherever 1-1/8 - 12 UNF thread inserts must be installed by hand. Typical applications include heavy equipment repair, industrial maintenance, and precision assembly work where thread integrity in metal components must be restored or reinforced. The prewinder design allows controlled, accurate seating of the insert without damaging the host bore. It is well suited for low-volume or field repair scenarios where a power installation tool is not practical or available.

Key Features

• Type IV Non-Captive Prewinder mechanism for controlled insert loading and installation
• Sized for 1-1/8 - 12 UNF thread inserts
• Spinner diameter of 2 inches for positive manual grip and torque
• Prewinder length of 3-1/16 inches for adequate insert engagement depth
• Fully manual hand operation - no power tools or pneumatics required

Compatibility

Designed for use with HELI-COIL thread inserts in the 1-1/8 - 12 UNF size. Compatible with Type IV Non-Captive Prewinder installation procedures for that thread specification.

Installation Notes

Installation should be performed by a qualified machinist or mechanical technician familiar with thread insert procedures. Ensure the host bore has been properly tapped to the correct HELI-COIL tap size before using this tool. Wind the insert onto the prewinder mandrel before inserting into the bore, and apply steady, even hand pressure to seat the insert to the correct depth. Do not use impact drivers or power tools with this hand installation tool.