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Decatur Diamond


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Decatur Diamond offers an array of high performance cutting tools that cover most automotive machining applications. High silicon aluminum castings such as cylinder blocks, heads, covers, transmission cases, valve bodies, and pistons are prime candidates for our tooling systems. Face milling, cubing, reaming, boring, turning, or multi-function tooling - we have a solution for you. Our tools provide high production machining of silicon aluminum and bimetallic aluminum/cast iron components