Welcome to Mainstream Precision CNC Machining & Manufacturing. Based in Cincinnati, Ohio, Mainstream is a leading provider of precision manufacturing services, specializing in advanced 5-axis abrasive waterjet cutting, CNC machining, and Swiss turning. With over 35 years of experience, we deliver high-quality, cost-effective solutions to industries including aerospace, defense, automotive, medical, and construction. Our AS9100 and ISO 9001 certifications, along with ITAR registration, reflect our unwavering commitment to quality, compliance, and reliability. At Mainstream, we leverage cutting-edge technology and a customer-first mindset to meet even the most demanding manufacturing challenges.