Benefits & Applications

When incorporated into new or existing designs the Wire Thread Insert can both enhance quality and improve performance.

This is because Wire Thread Inserts provide a high performance permanent thread which exceeds the strength of most parent materials.  This is especially true when weight is an issue and Aluminium or Magnesium alloy is used as a core material.

Strength

As a result of their flexibility, Wire Thread Inserts create internal threads which have a much improved distribution of residual stress loading when compared with conventional tapped holes, where up to 70% of the shearing forces are carried by the first three threads in the tapped hole. 

This flexibility also compensates for pitch and flank angle errors, inherent in normal tapped holes, and significantly enhances the load bearing capacity by deflecting the residual forces into a helical hoop stress which is dispersed into the wall of the tapped hole, making it possible for the design to be confidently based on the bolt strength utilising smaller and shorter threads even when used in low strength materials.

Corrosion Resistance

WTI inserts are manufactured in Austenitic Chromium/Nickel Stainless Steel and offer excellent corrosion resistance, preventing   adverse seizing and galling even at elevated temperatures.

For applications involving severe corrosive conditions or subject to the effects of galvanic corrosion, additional surface coatings are available, such as Cadmium, Zinc, Aluminium, Silver or Molybdenum Disulphide.

Temperature Range

Standard Stainless Steel inserts, are suitable for operation within temperatures ranging from -160ºC to +420ºC (-320ºF to + 800ºF).

For applications involving extreme and elevated temperatures wire thread inserts can be manufactured in creep resistant Nickel based alloys.

Cost & Weight Benefits

Wire Thread Inserts are much lighter and less expensive than any other equivalent thread insert.

As a result of their compact size they can generally be incorporated into existing designs where no previous provision has been made. The mechanical strength benefits of the insert enables the use of thinner sections or lighter parent materials without sacrificing thread strength.

Wear Resistance

The combination of material hardness (RC43-50) and brilliant surface finish means wire thread inserts create internal threads that virtually eliminate friction induced thread erosion.