Company Category: Roughmill Systems

Leaders in Innovative Industrial Woodworking Machinery A legacy of craftsmanship meets cutting-edge innovation in our engineering, manufacturing and support capabilities for the building products industry. Since 1905, Mereen-Johnson has been at the forefront of the industrial woodworking machine industry. While manufacturing methods have changed, our machines continue to be known for their quality and durability, and our journey continues to be guided by a commitment to excellence, a passion for precision and close attention to our customers’ ever-changing challenges. Our heavy-duty machines and turnkey solutions are developed and built in our own manufacturing facility in the U.S.A. We’ll collaborate with you to customize a machine or build a system that meets your needs for increased efficiency, productivity and safety, whether you’re working with natural woods and fibers or high-tech composite materials. | From one man shops to large corporations, Mereen-Johnson’s “Leading Technology and Lasting Performance,” provides innovative solutions to many unique application and production requirements. Our Automation & Robotics Division expands our already considerable automation capabilities. We manufacture a complete line of stationary and moving blade multiple rip saws, Rip Optimizing and material handling, single and double end tenoners, CNC dovetailers, panel sizing systems, Door Sizing lines, and the engineering capability to design & build complete rough mill systems. Our Diehl Machines Division manufactures the industry’s best straight-line rip saw which produces a glue line cut second to none. | Mereen-Johnson is a leading provider of advanced manufacturing equipment and integrated system solutions, serving customers ranging from small, single-operator shops to some of the largest industrial producers in North America and beyond. Built on a foundation of engineering excellence and a deep understanding of wood processing and material handling, the company has earned a reputation for delivering on its promise of “Leading Technology and Lasting Performance.” At its core, Mereen-Johnson focuses on helping manufacturers improve throughput, maximize yield, and reduce labor dependency through intelligently designed machinery and automation. The company’s product portfolio is both broad and highly specialized, encompassing stationary and moving blade multiple rip saws, rip optimizing systems, and advanced material handling solutions. These technologies are designed to deliver precision, consistency, and efficiency in high-production environments where performance and reliability are critical. Beyond ripping and optimization, Mereen-Johnson offers a comprehensive lineup of secondary processing equipment, including single-end and double-end tenoners, CNC dovetailing systems, panel sizing systems, and complete door sizing lines. Each solution is engineered with a focus on durability, ease of integration, and long-term operational value. The company also distinguishes itself through its ability to design and build fully integrated rough mill systems, tailoring each installation to meet the unique production requirements of its customers. This systems-level approach enables manufacturers to streamline operations, reduce waste, and achieve consistent output quality across the entire production process. A key driver of Mereen-Johnson’s continued innovation is its Automation & Robotics Division. This group expands the company’s capabilities beyond standalone machinery into fully automated manufacturing cells and lines. By incorporating robotics, vision systems, and advanced controls, Mereen-Johnson helps customers address labor shortages, improve safety, and achieve higher levels of productivity. These automation solutions are developed with a strong emphasis on return on investment, ensuring that customers realize measurable gains in efficiency and profitability. Equally important is the legacy and performance of the company’s Diehl Machines Division, which manufactures one of the industry’s most respected straight-line rip saws. Known for producing a superior glue-line cut, Diehl equipment is synonymous with precision and quality, making it a benchmark in applications where cut accuracy and finish are paramount. Mereen-Johnson’s success is rooted not only in its equipment, but also in its commitment to partnership. The company works closely with customers to understand their specific challenges and production goals, delivering solutions that are both technically sound and operationally practical. With decades of experience, a strong engineering team, and a forward-looking approach to automation, Mereen-Johnson continues to play a critical role in advancing manufacturing capabilities across the woodworking and industrial sectors.