Armstrong ArmaCoil TwinCoil
The ArmaCoil TwinCoil System
Armstrong ArmaCoil TwinCoils are used to salvage wire thread insert holes that have become worn or stripped, as well as in the correction of out-of-position holes and tapped holes that aregauged to be oversized. The ArmaCoil TwinCoil system consists of two ArmaCoil inserts.
An Outer ArmaCoil TwinCoil is installed into an oversize tapped hole, which has an Inner ArmaCoil TwinCoil fitted inside to give a standard female thread.
The Outer TwinCoil insert is installed into the TwinCoil tapped hole (larger than a conventional wire thread insert tapped hole) and is the same nominal length as the original thread.
The Outer TwinCoil is always a free running insert while the Inner TwinCoil insert can be either free running or screw lock, depending on the application.
As the Inner TwinCoil insert must be supported by the Outer TwinCoil insert, its length is ONE COIL shorter than the Outer TwinCoil insert. This allows the Inner TwinCoil insert to be installed below the end of the Outer TwinCoil insert at each end.
Thread lengths less than 1.5 times the nominal diameter are usually not available. This is due to reduced thread engagement affecting the assembled strength to a potentially un-acceptable level.
ArmaCoil TwinCoil Thread Repair Kits
Armstrong ArmaCoil TwinCoil Kits are available in popular Unified sizes up to 3/4 inch and in metric sizes up to M20. The ArmaCoil TwinCoil kit comes in a sturdy box which contains the tools required to repair a worn, stripped or off-centre hole.
Armstrong ArmaCoil TwinCoil Kits come with a quantity of TwinCoil Outer and Inner inserts, a TwinCoil Bottoming Tap, and the TwinCoil Outer Inserting Tool. The ArmaCoil inserting tool for the TwinCoil Inner insert is not included but is available on request.
> ArmaCoil Screw Thread Inserts
> ArmaCoil TwinCoil
> ArmaCoil Thread Repair Kits
> ArmaCoil Power Tools
> ArmaCoil Installation Tools
> ArmaCoil Gauges & Extractors
> ArmaCoil STI Taps
> ArmaCoil Tang Break Off Tools
> ArmaCoil Installation
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