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How tangless wire thread inserts prevent joint failure

Written by Advanex | Jan 7, 2025 11:43:56 AM

Mechanical joint failures pose a persistent challenge in engineering applications, particularly in industries such as aerospace, automotive and heavy machinery. Among the solutions, tangless wire thread inserts stand out for their ability to enhance joint reliability and simplify maintenance.

In this article, we delve into the causes of joint failures, the role of tangless wire thread inserts and how they provide robust, efficient solutions to prevent failures in demanding environments.

The challenge of mechanical joint failure 

Mechanical joints are the backbone of any engineered system, yet they face a variety of threats that can lead to eventual (or premature) failure. These threats need to be efficiently managed and resolved, or could otherwise bring unnecessary costs. Moreover, these threats can make it difficult to integrate lighter and more fuel efficient components as they may be more susceptible to them. 

  • Stress concentration: Uneven distribution of load in a joint often leads to localised stress, resulting in deformation or cracking of materials​​.
  • Environmental factors: Corrosion, temperature fluctuations and vibrations can weaken joint integrity over time. For example, galvanic corrosion arises when dissimilar metals interact, particularly in harsh conditions like saltwater environments​​.
  • Material limitations: Lightweight metals such as aluminium and magnesium are increasingly favoured for their weight-saving benefits but are prone to wear, thread stripping, and fatigue​​.

Tangless wire thread inserts - a convenient and cost effective joint solution 

Tangless wire thread inserts are a modern evolution of the traditional tanged design. Unlike tanged inserts, which require a break-off tang that can leave behind debris (foreign object damage, FOD), tangless inserts feature a notch design that eliminates this risk​​.

  • Bidirectional installation: They can be inserted and removed easily from either end, facilitating repairs and maintenance.
  • No FOD risk: By eliminating the tang, these inserts prevent debris from compromising sensitive systems, particularly in aerospace applications​​.
  • Customisable material and finish: Available in various materials such as stainless steel and Inconel, with finishes like cadmium plating for enhanced corrosion resistance​​.

The role of tangless wire thread inserts in preventing joint failure 

Tangless wire thread inserts resolve many of the traditional challenges faced by mechanical joints, but also proactively enhance performance to prevent failure in a number of ways.

Ease of installation and maintenance

Traditional inserts require tang break-off and retrieval, introducing complexities during installation. Tangless inserts simplify the process, reducing downtime and minimising the risk of operator error​​. Their easy removal also streamlines maintenance in systems requiring frequent inspections or replacements.

Enhanced load distribution

The helical design of tangless inserts dissipates stress evenly across the fastener and parent material, protecting softer materials from wear and reducing the risk of fatigue or cracking​​.

Performance in extreme conditions

Tangless wire thread inserts excel in harsh environments. They resist corrosion, withstand extreme temperatures, and remain secure under intense vibrations. These properties are vital in aerospace and automotive industries where mechanical joints are exposed to dynamic forces​​.

Protect your components with innovative joint solutions

Mechanical joint failures remain a critical issue across engineering disciplines. Tangless wire thread inserts offer a sophisticated solution by addressing key vulnerabilities while simplifying installation and maintenance. Their superior performance in diverse applications ensures the longevity and reliability of joints.

As a leader in the field, KATO provides industry-leading tangless wire thread inserts. These products are engineered to enhance mechanical joints across applications, ensuring precision, durability and efficiency. To learn more about optimising your designs with KATO's wire thread inserts, download our comprehensive guide on mechanical joints today.