Bone Screw and Implant Screw Machining

Precision-machined bone screws and implant screws demand tolerances that leave no room for error. Criterion Precision Machining brings over 70 years of manufacturing expertise to every orthopedic and spinal implant component—producing titanium, stainless steel, and specialty alloy screws with tight tolerances down to ±.0002", full ISO 13485 compliance, and production-ready quality from prototype to volume.

Precision-machined titanium bone screws and implant screws on a clean machining surface

Our Bone Screw and Implant Screw Machining Services

From prototype to full production, we deliver precision-machined implant screws in titanium, stainless steel, and specialty alloys.

Swiss Turning

Ideal for small-diameter bone screws and implant fasteners, our multi-axis Swiss turning centers achieve diameters as small as .010" with tolerances down to ±.0002"—critical for orthopedic and spinal screw geometries.

CNC Turning

High-precision CNC turning for cylindrical implant screw blanks and cannulated screw bodies, handling complex geometries in titanium, stainless steel, and PEEK with tight tolerances and smooth surface finishes.

CNC Milling

Multi-axis CNC milling for implant screw heads, drive features, and complex screw profiles requiring 3-, 4-, or 5-axis machining to achieve precise hex, torx, or custom drive geometries.

Production Prototyping

Production-intent prototype runs for bone screws machined on the same equipment and to the same standards as full production orders, enabling seamless scale-up without reprogram or re-qualification.

Quality Inspection

Comprehensive CMM-based inspection and dimensional reporting using Global Advantage CMM, OASIS optical inspection, and Keyence systems—measuring critical screw dimensions with full documentation and Certificates of Conformance.

Material Expertise

Experienced machining of implant-grade titanium (Ti-6Al-4V), 316L stainless steel, cobalt-chrome alloys, and PEEK—materials that meet the demanding biocompatibility and mechanical requirements of FDA-regulated devices.

CNC Swiss turning machine producing precision bone screws from titanium bar stock

Our 5-Step Bone Screw Machining Process

Design Review and Engineering Consultation

We begin with a thorough review of your implant screw drawings, tolerances, and material specifications. Our team identifies any manufacturability considerations upfront—helping medical device OEMs avoid costly design revisions before a single part is cut.

Material Selection and Procurement

Precision Machining with Swiss and CNC Equipment

In-Process and Final Quality Inspection

Documentation and Delivery

The Criterion Difference

Why Choose Criterion Precision Machining?

Decades of medical device machining experience, rigorous quality systems, and a commitment to zero-defect delivery set Criterion apart.

ISO 13485 Certified

Our ISO 13485 and ISO 9001 certifications ensure every bone screw meets the strictest medical device quality management requirements.

Micro-Precision Tolerances

We hold tolerances down to ±.0002" on implant screws—critical for orthopedic and spinal components where dimensional accuracy is non-negotiable.

70+ Years of Expertise

Founded in 1953 and now in its third generation of ownership, Criterion brings unmatched machining heritage to FDA-regulated medical device manufacturing.

Full Traceability & Documentation

Every implant screw shipment includes a Certificate of Conformance and inspection reports—providing the documentation chain your regulatory submissions require.

Meet The Criterion Team

Experienced professionals dedicated to precision, quality, and mission-critical 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 a bone screw?

A bone screw is a medical implant fastener used in orthopedic and spinal surgery to fix bone fractures, attach plates and rods to bone, or anchor prosthetic implants. They are precision-machined components designed to meet strict biocompatibility and mechanical performance standards.

What type of metal is used for bone screws?

How are bone screws made?

How long do bone screws last?

What screws are used in orthopedic surgery?

Who makes medical screws?

How much does a medical titanium screw cost?

What certifications should a bone screw machining supplier have?

Still Have Questions About Implant Screw Machining?

Speak with our medical device machining experts for technical guidance and a free project consultation.

Certified & Trusted

Awards and Recognition

ISO 13485 certification badge for Criterion Precision Machining

ISO 13485 Certified

Medical device quality management system certification for implantable components.

ISO 9001 certification badge for Criterion Precision Machining

ISO 9001 Certified

International quality management standard ensuring consistent precision manufacturing.

WBENC Women's Business Enterprise certification badge

WBENC Certified

Women's Business Enterprise certification recognizing woman-owned business status.

Get a Quote for Bone Screw and Implant Screw Machining

Submit your drawings, specifications, or material requirements and our team will respond with a detailed quote. We work with medical device OEMs of all sizes, from prototype quantities to high-volume production runs.

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.