CNC Turning — Sub-Contract Manufacturing Services

Criterion Precision Machining provides CNC Turning — Sub-Contract Manufacturing Services for engineers and buyers who need cylindrical, complex-geometry components built to exacting standards. With tolerances down to ±0.0002”, live tooling, certified quality systems, and experience in medical device, aerospace, defense, and photonics work, Criterion helps reduce risk on parts where failure is not an option.

CNC lathe machining a precision metal component

Our CNC Turning Services

Precision CNC turning, inspection, prototyping, finishing, and traceability support for mission-critical components.

CNC Turning

Precision CNC turning for cylindrical and complex-geometry components, with tolerances down to ±0.0002”, smooth finishes, live tooling, and support for medical, aerospace, defense, and photonics applications.

Swiss Turning

High-repeatability Swiss turning for small-diameter parts, deep cuts, fine micro-features, and demanding geometries in titanium, stainless steel, specialty plastics, and alloys.

Production Prototyping

Production-intent prototypes built on production equipment and inspected with production metrology, helping qualified programs transition into higher-volume manufacturing without unnecessary requalification.

Quality Inspection

Integrated CMM, OASIS optical, and Keyence inspection workflows verify tight tolerances and support Certificates of Conformance, FAIRs, and material traceability records.

Mass Finishing

In-house deburring, vibratory finishing, high-energy tumbling, edge refinement, and assembly support reduce outside-vendor handoffs and help preserve chain-of-custody.

Laser Marking

Permanent fiber-laser marking for serialization, UDI, lot numbers, 2D matrix codes, and traceability on turned components used in regulated applications.

Technician inspecting CNC turned metal parts

Our CNC Turning Production Process

Engineering Review and RFQ Alignment

Criterion reviews drawings, tolerances, material requirements, compliance needs, and production intent to confirm the CNC turning approach. The team identifies critical features, inspection expectations, and any secondary operations needed before programming begins.

Programming, Tooling, and Setup Planning

Precision Turning and Secondary Operations

Inspection, Documentation, and Delivery

The Criterion Difference

Why Choose Criterion Precision Machining?

Criterion combines advanced equipment, certified systems, and decades of machining discipline.

No-Failure Focus

Built for medical, aerospace, defense, and photonics parts where component failure is unacceptable.

Certified Quality

ISO 13485 and ISO 9001 systems support regulated manufacturing and documentation requirements.

Integrated Capability

CNC turning, Swiss turning, finishing, marking, and inspection stay under one accountable roof.

Legacy Team

Founded in 1953 and led by third-generation ownership with a people-powered manufacturing culture.

Meet The Criterion Team

Experienced leaders supporting precision, quality, and customer communication.

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 types of parts can Criterion produce with CNC turning?

Criterion’s CNC turning capabilities support micro- to medium-sized cylindrical and complex-geometry parts, including surgical instruments, implantable device components, diagnostic equipment parts, aerospace and defense components, lens housings, lens mounts, and optical-system components. Multi-tasking live tooling enables done-in-one production on parts that would otherwise require multiple setups, helping reduce cycle time and tolerance stack-up.

What tolerances are available for CNC turned parts?

What materials can be used for CNC turning?

Can Criterion support both prototypes and production runs?

What is live tooling in CNC turning?

What inspection documentation is available with CNC turning orders?

Is Criterion qualified for regulated industry CNC turning?

What information is needed to quote a CNC turning project?

Have a Complex Turning Requirement?

Get clear answers before you release your next turned component.

Certified & Trusted

Awards and Recognition

ISO 13485 certification logo

ISO 13485

Medical device quality management certification.

ISO 9001 certification logo

ISO 9001

Certified quality system for precision manufacturing.

WBENC certification logo

WBENC Member

Recognition as a woman-owned business.

Ready to Quote Mission-Critical Turned Parts?

Share your drawings, material requirements, tolerances, and production expectations. Criterion’s team will review your CNC turning needs and respond with practical next steps for prototyping, production, inspection, and documentation.

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.