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Belzona® Saves The Bull Gear



Mining and Quarrying (MINQ)



Mechanical Power Transmission (MPT)


Customer Location:

N.E. Washington, USA


Application Date:

November 2014


Application Situation:

Ore processing Ball Mill bull gear.



The gears on this Ball Mill bull gear were experiencing erosion and pitting.



Belzona 1111 (Super Metal)

Belzona 1321 (Ceramic S-Metal)





Application Method:

The application area was thoroughly cleaned with solvent and then grit blasted to prepare the surface. All erosion damage was filled in with Belzona 1111 and followed with a brush on coating of Belzona 1321 to protect against further damage.


Belzona Facts:

If unchecked, the erosion damage could have weakened the bull gear, forcing the need to replace it. There are a total of 5 of these gears with damage and they were manufactured in the 1960's. The replacement cost is estimated at $150,000.00 USD each and roughly 3 months to have them made. This Belzona repair was handled in a couple days by one person and used less than $150.00 USD in material.


Photographs Description

  1. 1 of 5 Ball Mills.
  2. Erosion damage cleaned and grit blasted.
  3. Application of Belzona 1111.
  4. Application of Belzona 1321.
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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