MOLYKOTE® Metal Assembly Paste to avoid microwelding of pipes in rock-drilling machines

metal assembly paste blog

Table of Contents

MOLYKOTE® Metal Assembly Paste used to avoid microwelding of pipes in rock-drilling machines

  • Lubricant application story: Threaded connections
  • Market segment: Mining
  • Component/application: Threaded connections
  • Major market: Maintenance, repair & overhaul (MRO)


Customer’s area of concern

Customer’s description of component

One of the first stages of the mining industry is to drill the ground. The rock-drilling machines are the ones that drill over 20 mts of rock and need a lubricant to stop seizure in the threaded connections of the pipes.

Previous solution/product previously used

Zinc-based thread compound

Operational parameters (LETS)

  • Load: High
  • Environment: Moist and dusty
  • Temperature: >200oC
  • Speed: 1,000 RPM

Process description

Before starting to drill, it is applied over the threaded connection, letting the solid lubricants act and avoiding microwelding of the connections. After this, the pipes are assembled, and drilling begins.


Customer’s critical requirements

Problem category


Problem details

The lubricant the customer was using was not suitable for the application and was not able to provide the correct protection to the threaded connections. It was a zinc-based thread compound unable to provide the correct torque when disassembled.

Root-cause analysis

Microwelding on the threaded connections due to high temperature, loads and pressure MOLYKOTE® Smart LubricationTM solution selected

Result: Our solution

MOLYKOTE® Metal Assembly Paste is not a compound or a grease; it is a lubricant paste capable of supporting extreme drilling conditions because the MoS2 and other solid lubricants can avoid microwelding in applications above 400oC, with a high load.


Learn more about MOLYKOTE® Metal Assembly Paste

To learn more about the advantages of using MOLYKOTE® Metal Assembly Paste on threaded connections in rock-drilling machines  or for other tough lubrication challenges contact your local MOLYKOTE® technical representative.

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If you have any questions or want to find out more about the possibilities for your industrial application, please complete the contact form and one of our experts will be in touch.

If you have a problem with industrial adhesives, sealants, lubricants or electronic protection products and require advice, you can contact our technical support service. Our team can help you to optimize your processes and applications.

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