Offering a full line of parts for rod, ball and semi-autogenous grinding mills.

We have more than six decades of experience producing replacement parts for grinding mills, and have manufactured virtually every part which receives abrasive wear.

Proven, high volume vendor. You can rely on Columbia Steel to produce all the parts you need for a maintenance shutdown. And all parts are guaranteed for proper fit, performance and customer satisfaction.

Engineering design consultation. Our Product Engineers are available to help you optimize the wear life of your grinding mills. As new designs are developed, our in-house pattern department translates them into accurate patterns.

Alloy selection. We produce parts with just the right levels of hardness and toughness for your application, choosing from our high chromium alloy irons, chromium molybdenum steels, high-strength martensitic steels or austenitic manganese steels. Few other vendors give you these options to control abrasive wear and minimize part breakage.

Columbia parts for grinding mills include:

Shell Liners and Lifter Bars. We offer many choices in design and alloys for all popular mills, ranging from traditional wavy styles to sophisticated composite liners for high wear resistance.

End Liners and Grates. These parts are available in standard design and with specialized discharge slots to suit the application.

Chute and Trunnion Liners. We can protect any mill area which receives abrasive wear. We have produced large, machined Trunnion Liners weighing as much as 13,000 lbs (5897 kg).