Superior Roll Forming Company

Based in Ohio, McDonald Steel Corporation supplies engineered, hot rolled steel bars and shapes. The firm is 40 percent employee-owned. It is an ISO 9001:2000 certified company. Some of the company s products include engineered near net shapes and merchant bars, such as bridge expansion joint, auto hinge, ring gear, spigot snap ring, etc. McDonald Steel Corporation maintains one of the world s largest inventories of tooling for nearly 500 different asymmetrical hot rolled shapes. The firm s products find applications in truck/bus wheel rims, off-road equipment wheel rims, highway bridge decking, bridge expansion joints, concrete water pipe couplings, etc.

SIFCO Industries specializes in the repair of turbine engine components for the world s major airlines. The company also produces parts used in the production of aircraft airframes and turbine engines. It maintains a growing network of manufacturing, service and distribution centers in the United States, Europe and Asia. SIFCO features expertise in hot section components, blades and vanes. The company s capabilities include turbine material supply, overhaul, precision machining, exchange programs and inventory management. It produces forged and finished components for the aerospace industry in a wide variety of alloys. The company also provides equipment, solutions and contract services for selective electroplating in aerospace, defense and industrial applications. SIFCO Industries has operated for more than 90 years and is headquartered in Cleveland.

The Timken Company makes customers' products run smoother and more efficiently with its highly engineered bearings, alloy steels and related products and services. Timken company products turn up everywhere - on land, on the seas and in space. With operations in 27 countries, sales of $4.5 billion annually and 26,000 employees, Timken has ranked among the 250 largest United States industrial corporations since the 1920s. The company serves the aerospace, automotive, construction, industrial, mining, rail and super precision industries. It trades on the New York Stock Exchange under the symbol TKR. Timken is headquartered in Canton, Ohio.