Precision CNC Turning Services with Custom Solutions

Criterion Precision Machining delivers mission-critical CNC turning solutions for industries where failure isn't an option. With tolerances down to ±.0002", advanced Swiss turning capabilities, and ISO 13485 certification, we transform complex designs into flawless components. From medical devices to aerospace applications, our woman-owned, Ohio-based team combines 70+ years of precision machining expertise with cutting-edge technology to deliver parts that meet your most exacting specifications.

Precision CNC turning machine creating complex cylindrical component

Our Precision CNC Turning Services

From micro-components to complex geometries, we deliver precision turning solutions for mission-critical applications.

Swiss Turning

Specialized Swiss turning for complex components down to .010" diameter with tolerances to ±.0002". Ideal for medical devices, aerospace, and photonics requiring intricate micro-features and exceptional surface finishes on challenging materials.

Multi-Axis CNC Turning

Advanced 2-axis and 6-axis multi-tasking turning centers with live tooling for complex cylindrical parts. Expertly machine titanium, stainless steels, specialty plastics, and alloys with consistent repeatability for aerospace and defense applications.

Production Prototyping

Production-intent prototyping that bridges design and manufacturing. Test fit, function, and manufacturability with the same precision and quality standards as full production runs, ensuring seamless transition to high-volume manufacturing.

Precision Quality Inspection

Certified quality assurance with Global Advantage CMM, OASIS optical inspection, and Keyence measuring systems. Multiple inspection points throughout manufacturing ensure every component meets your specifications with comprehensive documentation included.

Multi-Axis CNC Milling

Complement your turning projects with 3-, 4-, and 5-axis precision milling capabilities. Create complex, multi-axis components with tight tolerances and consistent repeatability for integrated manufacturing solutions.

Secondary Operations

Complete your project with in-house secondary operations including finishing, assembly, and additional machining. Streamline your supply chain with single-source manufacturing from raw material to finished component.

Mission-Critical Quality

Precision Machining Where Failure Is Not an Option

For over 70 years, Criterion has been the trusted choice for industries demanding absolute precision. Our ISO 13485-certified facility in Brook Park, Ohio houses advanced Swiss turning and multi-axis CNC equipment capable of holding tolerances to ±.0002". Whether you're developing surgical instruments, aerospace components, or photonics assemblies, our expertise in complex geometries and challenging materials—from titanium to specialty plastics—ensures your most critical parts are manufactured right the first time. With comprehensive in-house inspection and production-intent prototyping, we deliver confidence at every stage.

Precision CNC turned components with micrometer measurement tool
The Criterion Difference

Why Choose Criterion Precision Machining?

Three generations of precision engineering excellence serving America's most demanding industries.

Extreme Tolerances

Achieve tolerances down to ±.0002" with advanced Swiss turning and multi-axis CNC technology.

ISO Certified Quality

ISO 13485 and ISO 9001 certified with FDA and ITAR registration for medical device and defense compliance.

Specialized Expertise

Dedicated focus on 'No Failure' industries: medical devices, aerospace, defense, and photonics applications.

Woman-Owned Legacy

Third-generation, WBENC-certified woman-owned business combining decades of Ohio manufacturing heritage with cutting-edge precision technology.

Expert Leadership Team

Seasoned professionals dedicated to precision manufacturing excellence.

Professional headshot of Tanya DiSalvo, President

Tanya DiSalvo

President

As third-generation owner and President of Criterion Precision Machining, Tanya DiSalvo leads our commitment to delivering mission-critical components for Texas railroad infrastructure. Under her leadership, Criterion has evolved into a woman-owned precision machining company specializing in the 'No Failure' sectors, including railroad safety systems. Tanya's vision has guided the company's investment in advanced CNC technology and ISO certification programs, ensuring our Texas railroad clients receive components that meet the most stringent safety and performance standards. Her dedication to quality excellence and operational efficiency has positioned Criterion as a trusted partner for railroad manufacturers requiring precision components that perform reliably across Texas's diverse operating environments, from Gulf Coast humidity to West Texas desert conditions.

Professional headshot of Kelly Marflak, Quality Manager

Kelly Marflak

Quality Manager

Kelly Marflak serves as Quality Manager at Criterion Precision Machining, overseeing our comprehensive quality assurance programs critical to railroad component manufacturing. With deep expertise in precision inspection protocols, Kelly manages our certified Quality Assurance program that includes multiple points of precision inspection built into manufacturing processes. She oversees the operation of our Global Advantage CMM with PC-DMIS software, OASIS Optical Automatic Smart Inspection System, and Keyence measuring systems capable of measuring up to 99 dimensions simultaneously. Kelly's meticulous attention to detail ensures every railroad component meets the exacting tolerances and safety standards required for Texas railroad applications. Her leadership in quality control processes has been instrumental in maintaining our ISO 13485 and ISO 9001 certifications, providing railroad manufacturers with the documentation and compliance verification essential for safety-critical components operating across Texas's extensive rail network.

Professional headshot of Mike Pinchot, Estimator/Project Manager

Mike Pinchot

Estimator/Project Manager

Mike Pinchot brings extensive project management expertise to Criterion's railroad machining operations as Estimator and Project Manager. With deep understanding of precision manufacturing requirements, Mike works closely with Texas railroad clients to develop accurate project estimates and manage complex machining programs from concept through delivery. His technical expertise enables him to assess challenging railroad component specifications and coordinate multi-axis machining operations, Swiss turning processes, and quality inspection requirements. Mike's project management approach ensures railroad components are delivered on time and within budget while meeting the stringent quality standards required for safety-critical applications. His collaborative work with engineering teams and manufacturing personnel has streamlined processes for producing complex railroad parts, from prototype development through full production runs, ensuring Texas railroad infrastructure receives components manufactured to the highest precision standards.

Professional headshot of David Glass, Chief Financial Officer

David Glass

Chief Financial Officer

David Glass serves as Chief Financial Officer at Criterion Precision Machining, bringing strategic financial leadership to support our continued growth and investment in advanced manufacturing capabilities. With his comprehensive understanding of manufacturing economics and operational efficiency, David ensures that our precision machining operations remain competitive while maintaining the highest quality standards. His financial expertise enables Criterion to make strategic investments in cutting-edge CNC equipment, quality systems, and workforce development that directly benefit our clients in mission-critical industries. David's analytical approach to business management helps optimize our manufacturing processes and resource allocation, ensuring we can deliver exceptional value to customers while maintaining the financial stability necessary for long-term partnerships. His commitment to operational excellence supports our ability to serve the demanding requirements of medical device, aerospace, defense, and photonics manufacturers who rely on our precision machining capabilities.

Kellyanne Gottschalk, Internal Systems Manager at Criterion Precision Machining

Kellyanne Gottschalk

Internal Systems Manager

Kellyanne Gottschalk serves as Internal Systems Manager at Criterion Precision Machining, responsible for managing and optimizing the company's operational and business systems, including the ProShop ERP platform. Her role is critical in ensuring seamless workflow from order intake to final delivery, enabling real-time visibility into production scheduling, quality documentation, and compliance tracking. Kellyanne's expertise in systems management supports Criterion's ability to scale efficiently while maintaining the rigorous documentation and traceability standards required by regulated industries such as medical devices and aerospace. Her work underpins the company's operational excellence and helps ensure every project is delivered on time and in full compliance.

Nilda Feliciano, Customer Service representative at Criterion Precision Machining

Nilda Feliciano

Customer Service

Nilda Feliciano is the Customer Service representative at Criterion Precision Machining, serving as a dedicated point of contact for clients throughout the entire order lifecycle. From initial inquiries to order updates and delivery coordination, Nilda ensures that every client receives responsive, clear, and professional communication. Her commitment to customer satisfaction reflects Criterion's values of reliability and partnership, particularly important for clients in time-sensitive industries like aerospace, defense, and medical devices. Nilda's friendly and knowledgeable approach helps build lasting relationships with customers, ensuring they feel supported and informed at every stage of their project with Criterion.

Bonnie Paletta, Office Administrator at Criterion Precision Machining

Bonnie Paletta

Office Administrator

Bonnie Paletta serves as Office Administrator at Criterion Precision Machining, keeping the day-to-day operations of the business running smoothly. Her organizational skills and attention to detail ensure that administrative processes, documentation, and internal coordination are handled efficiently, freeing up the production and quality teams to focus on delivering precision components. Bonnie is a vital part of the Criterion team, contributing to the company's culture of professionalism and reliability. Her support role touches every department, helping to maintain the high standards of communication and organization that Criterion's clients in medical device, aerospace, and defense industries depend on.

Frequently Asked Questions

What is a precision turn?

A precision turn refers to CNC turning operations that achieve extremely tight tolerances, typically ±.0002" or better. At Criterion, precision turning involves using advanced CNC lathes and Swiss turning centers to create cylindrical components with exact dimensions, smooth surface finishes, and complex geometries. This process is essential for medical devices, aerospace parts, and other mission-critical applications where even microscopic deviations can affect performance. Our precision turning capabilities include multi-axis machining with live tooling, enabling us to produce intricate features in a single setup for maximum accuracy and repeatability.

What tolerances can you achieve with CNC turning?

What materials can you machine with CNC turning?

Do you offer prototyping before full production?

Are you certified for medical device manufacturing?

What is Swiss turning and when is it needed?

What secondary operations do you provide?

What is your typical lead time for precision turning projects?

Have More Technical Questions?

Our precision machining experts are ready to discuss your specific tolerances, materials, and application requirements.

Certified Excellence

Awards and Recognition

ISO 13485 certification logo

ISO 13485 Certified

Medical device quality management system certification

ISO 9001 certification logo

ISO 9001 Certified

International quality management standard certification

WBENC certification logo

WBENC Certified

Women's Business Enterprise National Council certification

Ready to Discuss Your Precision Machining Project?

Share your specifications and our expert team will provide a detailed quote and technical consultation for your CNC turning needs.

Contact Us Today

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.