CNC Milling
Precision 3-, 4-, and 5-axis CNC milling for complex, multi-axis components with tight tolerances and consistent repeatability, ideal for cleanroom-grade medical, aerospace, and photonics parts.
When contamination-free environments are non-negotiable, Criterion Precision Machining delivers cleanroom-grade precision machined components built to the tightest tolerances. From medical devices and aerospace assemblies to photonics and defense applications, our ISO-certified cleanroom machining capabilities ensure every part meets the exacting standards your mission-critical application demands.

Comprehensive cleanroom machining solutions—from complex multi-axis milling to precision Swiss turning—engineered for zero-failure industries.
Precision 3-, 4-, and 5-axis CNC milling for complex, multi-axis components with tight tolerances and consistent repeatability, ideal for cleanroom-grade medical, aerospace, and photonics parts.
High-precision CNC turning for cylindrical and complex geometry parts, delivering tolerances down to ±.0002" with smooth surface finishes for mission-critical cleanroom applications.
Specialized Swiss turning for small-diameter, high-precision components with micro-features, tight tolerances, and exceptional surface finishes suited to cleanroom environments.
Production-intent cleanroom prototyping that mirrors final manufacturing standards—same machines, same inspection protocols—enabling seamless scale-up without re-qualification.
Certified multi-point inspection using CMM, OASIS optical systems, and Keyence measuring tools, with complimentary Certificates of Conformance and final inspection reports.
Cleanroom-compatible machining of titanium, stainless steels, aluminum, PEEK, specialty plastics, and advanced alloys for the most demanding high-purity applications.

Engineering Review & Design for Manufacturability
Our team analyzes your part drawings, tolerances, and material requirements before production begins. We identify potential manufacturability challenges early, ensuring your cleanroom component is optimized for precision machining and compliant with FDA, ISO, and ITAR requirements.
Material Selection & Controlled Procurement
Cleanroom Precision Machining
Multi-Point Precision Inspection
Documentation, Packaging & Delivery
See how Criterion delivers cleanroom precision machining results that mission-critical manufacturers rely on.
Decades of precision expertise, industry-leading certifications, and an unwavering commitment to zero-failure quality set us apart.
ISO 13485 and ISO 9001 certified, ensuring cleanroom machining quality systems meet the strictest medical and industrial standards.
Founded in 1953 and now in its third generation, Criterion brings unmatched depth of experience to every precision machining project.
Global Advantage CMM, OASIS optical inspection, and Keyence systems verify every dimension—delivering complete traceability for U.S. manufacturers.
Specialized in medical device, aerospace, defense, and photonics—industries where precision isn't optional and every component must perform flawlessly.
Experienced professionals committed to precision, quality, and mission-critical excellence.

President
As the third-generation owner of Criterion Precision Machining, Tanya DiSalvo leads the company with a deep respect for its 70-year legacy and a clear vision for its future. Under her leadership, Criterion has evolved into a nationally recognized woman-owned precision machining company, achieving ISO 13485 and ISO 9001 certifications and expanding its capabilities to serve the most demanding cleanroom environments. Tanya is passionate about advancing manufacturing excellence, fostering a people-powered culture, and positioning Criterion as the go-to partner for medical device, aerospace, defense, and photonics customers who require absolute precision and zero-failure performance in every component delivered.

Estimator/Project Manager
Mike Pinchot serves as Estimator and Project Manager at Criterion Precision Machining, acting as a critical link between customers and the shop floor. With a thorough understanding of precision machining processes—including CNC milling, CNC turning, and Swiss turning—Mike ensures that every project is accurately scoped, competitively priced, and delivered on time. His hands-on knowledge of cleanroom manufacturing requirements and tight-tolerance components makes him an invaluable resource for customers in the medical device, aerospace, and defense sectors. Mike's attention to detail and proactive communication style ensures that projects move seamlessly from inquiry through production and final delivery.

Chief Financial Officer
David Glass serves as Chief Financial Officer at Criterion Precision Machining, providing the financial leadership and operational oversight that supports the company's growth and long-term stability. With a focus on sustainable investment in advanced machining technology, quality systems, and workforce development, David ensures that Criterion remains a financially sound and strategically positioned partner for its customers. His work behind the scenes enables Criterion to continually upgrade its cleanroom machining capabilities and maintain the high standards that industries like medical devices, aerospace, and photonics demand—ensuring the company remains a trusted, reliable supplier for decades to come.

Quality Manager
Kelly Marflak leads the Quality Assurance department at Criterion Precision Machining, overseeing the inspection systems and documented processes that keep every cleanroom-machined component within specification. Kelly manages Criterion's certified quality program, including the use of the Global Advantage CMM with PC-DMIS software, the OASIS optical inspection system, and the Keyence multi-dimensional measuring equipment. Her commitment to precision and compliance ensures that Criterion consistently meets ISO 13485 and ISO 9001 standards, while also satisfying the stringent FDA and ITAR requirements of medical device, aerospace, and defense customers who rely on zero-defect performance in every part they receive.

Internal Systems Manager
Kellyanne Gottschalk manages Criterion Precision Machining's internal systems, including the ProShop ERP platform that connects engineering, production, quality, and customer service into a unified workflow. Her role is essential to the operational efficiency that allows Criterion to deliver consistent, high-quality cleanroom precision machined components on schedule. By maintaining the integrity of internal processes and data systems, Kellyanne ensures that every order—from first-article prototype runs to full production volumes—flows smoothly through the facility, and that customers receive complete documentation, traceability records, and compliance reports with every shipment.

Customer Service
Nilda Feliciano is the friendly and knowledgeable face of customer service at Criterion Precision Machining. She serves as the primary point of contact for customers seeking updates on orders, documentation requests, delivery schedules, and general inquiries. Nilda's dedication to responsive, personalized communication ensures that every customer—whether a long-standing medical device OEM or a new aerospace supplier—feels supported and informed throughout the entire machining process. Her ability to translate complex manufacturing timelines into clear, actionable updates makes her an indispensable part of the Criterion team and a key reason customers return order after order.

Office Administrator
Bonnie Paletta keeps the administrative operations of Criterion Precision Machining running smoothly, supporting every department with the organizational efficiency that a precision manufacturing environment demands. From coordinating schedules and managing supplier documentation to supporting compliance recordkeeping and facilitating internal communications, Bonnie's work ensures that the team can focus on delivering exceptional cleanroom machined components without operational disruption. Her institutional knowledge of Criterion's processes and her meticulous attention to administrative detail make her a cornerstone of the company's ability to serve medical device, aerospace, and defense customers at the highest level of professionalism.
What is a cleanroom assembler?
A cleanroom assembler is a trained technician who assembles or machines components inside a controlled environment designed to minimize airborne particles, contaminants, and static. In precision machining, cleanroom assemblers follow strict protocols to ensure parts—especially for medical devices, aerospace, and photonics—are produced and handled without contamination that could compromise performance or compliance.
What is the cost of clean room maintenance?
What are the FDA guidelines for clean rooms?
What is a CNC cleanroom?
What is the ISO standard for CNC?
What tolerances can cleanroom precision machining achieve?
What industries does Criterion serve with cleanroom precision machining?
Does Criterion offer prototyping before full production runs?
Talk to our precision machining experts for a personalized consultation and project quote.
Criterion Precision Machining serves mission-critical manufacturers and OEMs throughout the United States from our Brook Park, Ohio facility.
Nationwide U.S.
Service Coverage
Brook Park, Ohio
Headquarters
1953
In Business Since
Contact us to discuss your cleanroom precision machining needs—we ship nationwide.
Medical device quality management system certification.
International quality management standard for precision machining.
Women's Business Enterprise National Council member certified.
Share your part specifications, tolerances, and production requirements. Our team will review your project and respond with a detailed, no-obligation quote tailored to your cleanroom machining needs.
For immediate assistance, feel free to give us a direct call at 216-267-1733 You can also send us a quick email at office@criteriontool.com
For immediate assistance, feel free to give us a direct call at 216-267-1733 You can also send us a quick email at office@criteriontool.com