Tight Tolerance Machining Services ±0.0001

When your components must perform flawlessly in medical devices, aerospace systems, or defense applications, there is no room for error. Criterion Precision Machining delivers tight tolerance machined parts down to ±0.0001", backed by 70+ years of experience, ISO 13485 and ISO 9001 certifications, and advanced CMM inspection—ensuring every part meets your most exacting specifications.

Precision machinist inspecting a tight tolerance CNC machined metal component under magnification

Our Tight Tolerance Machining Services

Explore our full range of precision machining capabilities engineered for mission-critical industries where failure is never an option.

CNC Milling

Multi-axis precision CNC milling for complex components requiring tight tolerances and consistent repeatability. Our 3-, 4-, and 5-axis capabilities handle the most intricate geometries for medical, aerospace, and defense applications.

CNC Turning

High-precision CNC turning for cylindrical and complex geometry parts with tolerances down to ±0.0002". From micro to medium-sized components, we deliver smooth surface finishes in titanium, stainless steel, and specialty alloys.

Swiss Turning

Expert Swiss turning for small-diameter, high-complexity parts with tolerances to ±0.0002". Our multi-axis Swiss centers handle diameters as small as .010" across challenging materials including titanium and specialty plastics.

Prototyping

Production-intent prototyping that mirrors full manufacturing standards. Prototypes are produced on the same machines with the same inspection protocols, enabling seamless scale-up without re-programming or re-qualification.

Quality Inspection

Certified quality assurance with CMM, OASIS optical inspection, and Keyence systems measuring up to 99 dimensions on 100 parts simultaneously. Certificates of Conformance and final inspection reports provided at no charge.

Multi-Material Machining

Skilled machining across demanding materials including titanium, stainless steels, aluminum, PEEK, specialty plastics, and high-performance alloys—delivering precision results regardless of material complexity.

±0.0001" Tolerances

Precision Machining Where Every Micron Matters

At Criterion Precision Machining, we specialize in components where a single deviation can mean the difference between success and failure. Serving medical device, aerospace, defense, and photonics industries from our Brook Park, Ohio facility, we hold tolerances down to ±0.0001" using advanced 5-axis CNC milling, Swiss turning, and CMM inspection systems. With over 70 years of manufacturing heritage and ISO 13485 and ISO 9001 certifications, we deliver repeatable precision your mission-critical application demands.

Advanced CNC machining center producing high-precision tight tolerance metal components
The Criterion Difference

Why Choose Criterion Precision Machining?

From our Ohio facility to customers across the United States, here is what sets Criterion apart in tight tolerance precision machining.

Extreme Tolerances

We hold tolerances down to ±0.0001", meeting the most exacting requirements in medical, aerospace, and defense sectors.

Certified Quality

ISO 13485 and ISO 9001 certified with a comprehensive QA program, including CMM and optical inspection for every order.

70+ Years of Experience

Founded in 1953 and now in its third generation, Criterion brings unmatched manufacturing heritage to Ohio and customers nationwide.

Woman-Owned & WBENC Certified

A certified Women's Business Enterprise proudly serving 'No Failure' industries with integrity, expertise, and a people-first approach.

Meet The Criterion Team

Dedicated precision machining professionals committed to zero-defect manufacturing.

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 considered a tight tolerance in machining?

In general machining, tolerances of ±0.005" are standard, while ±0.001" is considered tight. Tolerances of ±0.0005" and below—such as the ±0.0001" Criterion achieves—are classified as ultra-precision and require specialized equipment, skilled operators, and rigorous inspection protocols.

What is the tolerance for precision machining?

What is the tightest machining tolerance?

What industries does Criterion Precision Machining serve?

What materials can Criterion machine to tight tolerances?

How does Criterion verify that parts meet tight tolerance specifications?

Is Criterion Precision Machining ISO certified?

Can Criterion handle both prototype and production volume orders?

Still Have Questions About Our Machining Capabilities?

Talk to our precision machining experts for a free consultation and quote.

Where We Serve

Criterion Precision Machining serves mission-critical customers across the United States from our Brook Park, Ohio headquarters.

Nationwide USA

Service Area

Brook Park, Ohio

Headquarters

Since 1953

In Business

Do We Service Your Area?

Contact us to discuss your tight tolerance machining needs—we ship precision components nationwide.

Certified & Trusted

Awards and Recognition

ISO 13485 certification badge for Criterion Precision Machining

ISO 13485 Certified

Medical device quality management system certification.

ISO 9001 certification badge for Criterion Precision Machining

ISO 9001 Certified

International quality management system standard certification.

WBENC Women's Business Enterprise certification badge

WBENC Certified

Women's Business Enterprise National Council certified.

Request a Quote for Tight Tolerance Machining

Share your part requirements with our team and we will provide a fast, accurate quote. We specialize in complex geometries and tolerances down to ±0.0001" for medical, aerospace, defense, and photonics applications.

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.