Diamond Manufacturing was founded in 1978 in Atoka, Oklahoma by Ronnie Cochran. The company began as a small shop dedicated to building heavy equipment cabs for its parent company, Southwest Tractor (swtractor.com). Operating out of a modest facility with limited space, Diamond was built on hard work, craftsmanship, and a commitment to doing things right.
As Diamond continued producing cabs for Southwest Tractor, the company expanded into manufacturing additional attachments, including rippers and sweeps. Demand quickly grew beyond Southwest Tractor, and Diamond began supplying products to a broader customer base. With this growth, Ronnie brought in Pat Loftis to help lead and manage the company.
Over time, Diamond evolved from a small operation into a trusted manufacturer of a wide range of attachments, including screens, rakes, and other equipment solutions for various heavy equipment brands. Throughout this growth, the company remained committed to its core mission: producing durable, high-quality attachments at a fair and competitive price.
Ronnie’s sons, Keith and Craig Cochran, later joined the business, contributing to the design, development, and sales of Diamond’s expanding product line. Today, Keith serves as General Manager, while Ronnie and Pat remain actively involved as co-owners—continuing to lead the company from its roots in Atoka.
In recent years, the next generation of the Cochran family—Tyler, Joshua, Ashlynn, and Rylan—has stepped in to carry on the legacy. With the same values that started it all, Diamond Manufacturing continues to build for the future while staying rooted in its family-owned tradition.
