Crown Precision Machining | 100% Quality. 100% Delivery. Welcome to Crown Precision! Located in Irwindale, CA, Crown Precision is a state-of-the-art CNC machine shop specializing in high-precision CNC turning, milling, grinding, and component part assemblies. Since 1984, we have built our reputation by providing outstanding customer service through quick responses, on-time delivery, and proven lean manufacturing principles. Crown Precision has the capability to manufacture parts…