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HeliCoil Hand & Manual Installation Tools

For low volume production runs, prototype manufacture, salvage, and thread repair, the use of Emhart Technologies HeliCoil hand & 
manual installation tools are recommended. The various types of HeliCoil Inserting Tools are shown below. Generally, there are two types 
of HeliCoil Hand Installation Tools – threaded mandrel type and the prewinder type.

The HeliCoil Prewinder Type Inserting Tool is used with HeliCoil fine pitch inserts as these inserts are proportionately larger in their free 
state than HeliCoil coarse pitch inserts. Emhart Technologies HeliCoil fine pitch inserts need to have their diameters reduced before they 
are installed into the hole. This is accomplished by winding the HeliCoil insert through a set of threads called a prewinder, located at the 
front of the HeliCoil Prewinder Installation Tool. 

HeliCoil coarse pitch inserts (and 2-56 and 3-48 inserts) do not require "prewinding", so they can be installed using the HeliCoil Threaded 
Mandrel Inserting Tool. The threaded mandrel at the front of the tool engages the HeliCoil insert and provides a positive lead to guide the 
HeliCoil insert into the tapped hole quickly and efficiently. With the threaded mandrel, installing a HeliCoil screw thread insert is easy and 
incidents of 'cross pitching' are minimised. 

These Emhart technologies HeliCoil Hand Installation Tools will install HeliCoil screw thread inserts up to 3 diameters long for thread sizes 
up to 7/8" UNC & UNF and metric sizes up to M22. HeliCoil Installation Tools for sizes over 1 inch UNC & UNF or M24 will install HeliCoil 
inserts up to 2 diameters long.