Helical手动工具
Heli-Coil manufactures various designs of hand installation tools.
Generally, finer pitch inserts are proportionately larger in the free state than coarse pitch inserts and therfore have to be “pre-wound” to a smaller diameter for installation.
Large coarse pitch inserts (and 2-56, 3-48, and M2.2 inserts) need only a threaded mandrel tool for installation.
TYPE I
Threaded Mandrel
Sizes 2-56 and 3-48
TYPE II
Prewinder
#4 through 1/2" UNC
#3 through 1/2" UNF
TYPE III
Threaded Mandrel
TYPE IV
Non-Captive Prewinder
9/16" through 11/2" UNF
9/16" through 11/2" UNC
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