What is Thread Galling?

Last Updated on July 1, 2020 by Marsh Fasteners

Thread galling is also often referred to as ‘cold welding’. It is a very common problem that, luckily, also has a solution. But before we get into that, let us address the question ‘what is thread galling?’:

  • ThreadGalling

Thread galling usually occurs during the installation process and takes place when pressure and friction lead to bolt threads seizing to the threads of a nut or tapped hole. This can make it difficult, and often nearly impossible, to remove the fasteners in the future. Forced removal may be required, which can cause frustration and also result in unexpected costs.

  • Why DoesThread Galling Occur?

It is important to note that thread galling occurs not because the fasteners themselves are of bad quality, but rather due to the installation process. Having said that, certain types of fasteners are indeed more prone to galling. These fasteners include stainless steel, aluminum, and titanium fasteners. Fasteners with fine threads are also more at risk of galling when compared to those with coarse threads.

  • How CanGalling Be Prevented?

The easiest way to prevent galling from happening is to slow down the installation process substantially. The friction that takes place during the installation process is further aggravated by heat, and it is this combination that is often the sole culprit responsible for galling. Manual installation is recommended rather than using power tools.

You may also help to prevent galling by using appropriate lubricants. Anti-seizing and anti-galling lubricants are now available on the market and can go a long way to helping ensure a smooth, hurdle-free installation.

Are you on the hunt for high-quality fasteners for your projects? You’ll find them here at Marsh Fasteners. Contact us now for in-depth information regarding our project range.

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