Thread Galling 101: What Causes Galling & How Can You Prevent It?

Thread galling (aka “cold welding”) can cause all sorts of headaches for the ham radio operator or RF tech working around a radio tower or transmitter site. In a nutshell, thread galling occurs when a nut and bolt are fused together thanks to the heat from friction during the tightening process. Galling depends on a few factors, including fastener material and the way the threads are made, either via rolling or cutting. The good news is, galling is easily preventable. Follow along as DX Engineering technical support specialist Michael Murphy shows you exactly how and why galling occurs, and how you can keep galling from harming the fasteners in your ham radio tower installation.
You can buy the galling prevention anti-seize lubricants explained in this video at DX Engineering:
www.dxengineer...
Learn more about galling and prevention here:
www.dxengineer...

[@Ahmed-de8qn]

thanks Michael for your clear explanation

[@walterhuang5075]

Simple and understandable! Thank you. Keep up your good work.

[@adyg6ad73]

Every day is a learning day 👍

[@williammyers-ka8gim978]

Yes, happened to me with a stainless steel bolt and nut. That taught me the importance of ant-seize lubricants.

[@jeffwright6685]

I work in industrial maintenance i many times i use blue loc-tite vs anti-seize dissimilar metal causes galvanic corrosion and they fuse also loc-tite puts a fine coat of plastic on the threads and it usually firms up making a plastic coating the anti-sieze can dry and also cause galling , that's my personal experience, KF8AGW 73's.

[@VP2EIHonAnguillaIsland]

Yup agree 👍🏽 💯 % we got our cans from DXE.. 73

[@Siskiyous6]

lubricate any two metallic surfaces

[@Ed-vi6tg]

I never knew why exactly why bolts or screws snapped off; now I know. I've learned to grease all threads that I might need to revisit, including Edison socket light bulbs and plumbing fixtures parts.

[@loueckert4970]

Good info, tnx for posting... 73 de KT1R

[@johnvenuk8504]

Thanks for the heads up on the gauling problem. When I first started in the machine design trade I was taught to never use the same metals together on bearing surfaces. They never did explain what caused the gauling situation. Your video really helped me understand why gauling happens in the first place. Thanks for the heads-up! I always love to learn! No matter what age I am! ಡ⁠ ͜⁠ ⁠ʖ⁠ ⁠ಡ