Precision Machining Capabilities

Swiss CNC machining, CNC turning and milling, Wire EDM and custom solutions backed by engineering expertise, advanced quality planning, and more than 40 years of manufacturing experience.

Manufacturing Services

Swiss CNC Machining

For high-volume production runs requiring exceptional precision and repeatability, Rathburn’s Swiss CNC machining capabilities deliver efficient manufacturing of complex turned components. Our advanced Citizen Swiss machines support tight tolerances, consistent quality, and scalable production for demanding applications.

CNC Turning & Milling

Rathburn provides CNC turning and milling services for manufacturers requiring precision-machined components from prototype through production. Using advanced turning centers and machining centers, we produce complex components across a wide range of materials and industries.

Wire
EDM

When conventional machining reaches its limits, Wire EDM provides the precision needed for intricate geometries and ultra-tight tolerances. Integrated with our turning and milling operations, Wire EDM helps deliver complete manufacturing solutions from a single trusted partner.

Custom
Solutions

Every manufacturing challenge presents a unique opportunity to improve. Rathburn partners with customers to develop practical manufacturing solutions that improve quality, increase efficiency, and support long-term production success—from concept through full-scale production.

Why Manufacturers Choose Rathburn

Engineering Support

The best manufacturing outcomes begin long before production starts.

Design for Manufacturability (DFM)

Our engineering team works with customers to identify opportunities to improve manufacturability, reduce costs, simplify production processes, and improve long-term part performance. From tolerance stack-up reviews to alternative material recommendations, we help customers solve problems before they reach the shop floor.

Product Development Support

Whether launching a new product or transitioning an existing component, Rathburn provides engineering support that helps manufacturers move efficiently from concept to production.

Production Manufacturing Expertise

Prototype-to-Production Support

New product launches often require flexibility. Rathburn supports customers from early prototype development through production ramp-up while maintaining the quality and consistency needed for long-term success.

Repeat Batch Production

Much of our work involves repeat production programs where customer demand changes over time. Our systems, equipment, and processes are designed to scale efficiently while maintaining consistent quality.

Long-Term Manufacturing Partnerships

20+ Year Customer Partnerships

Many of Rathburn’s customer relationships span decades. We attribute that longevity to treating customers as partners, proactively solving problems, and continuously looking for ways to improve quality, efficiency, and outcomes.

Responsive Communication & Problem Solving

Many manufacturing challenges don’t begin on the shop floor—they begin with communication. Rathburn works closely with customers throughout the quoting, development, and production process to identify issues early, provide timely updates, and proactively recommend solutions that improve quality, efficiency, and long-term results.

Advanced Manufacturing Technology

CNC Turning Technology

Takisawa turning centers with twin-spindle, live-tooling, and gantry capabilities support efficient production of precision turned components.

CNC Milling Technology

Brother and Okuma machining centers provide flexible milling solutions for complex components and production manufacturing requirements.

Swiss & Multi-Spindle CNC Technology

Citizen Swiss and Miyano machines deliver exceptional precision and efficiency for complex turned components requiring tight tolerances and high-volume output.

Wire EDM Technology

Sodick Wire EDM technology enables the production of intricate features and ultra-precise components requiring tolerances as tight as ±0.00005″.

Materials Expertise

Manufacturing success begins with selecting the right material for the application. Rathburn Precision Machining regularly produces components from a wide range of production metals, high-performance alloys, and engineered materials, helping customers balance performance, durability, manufacturability, and cost.

Production Materials

The majority of Rathburn’s production work is performed using proven production metals selected for their strength, machinability, durability, and cost efficiency.

Aluminum

Lightweight, corrosion-resistant, and highly machinable for aerospace, transportation, and industrial applications.

Carbon Steel

A versatile material offering excellent strength, durability, and cost efficiency for production manufacturing.

Alloy Steel

Enhanced hardness, toughness, and wear resistance for high-performance components and demanding applications.

Stainless Steel

Corrosion-resistant and durable for demanding environments where longevity and performance are critical.

Brass

Excellent machinability and corrosion resistance for fittings, valves, connectors, and precision components.

Cast Iron

Exceptional wear resistance and durability for industrial equipment and transportation applications.

Specialty Materials

For applications requiring enhanced performance characteristics, Rathburn also machines a variety of high-performance alloys engineered for extreme environments and demanding operating conditions.

Inconel 625

High-temperature and corrosion-resistant alloy for aerospace, defense, and energy applications.

Monel 400

Excellent corrosion resistance in marine and chemically aggressive environments.

Nitronic 60

Superior wear, galling, and corrosion resistance for demanding industrial applications.

Engineered Materials

Beyond traditional metals, Rathburn also supports precision machining of select engineered materials where weight reduction, dimensional stability, or wear resistance are critical.

Delrin

A durable engineering plastic known for dimensional stability, low friction, and excellent wear characteristics.

Need help selecting the right material?

Industries Served

For more than 40 years, Rathburn has supported manufacturers operating in highly regulated, quality-driven industries where precision, consistency, and reliability are critical to success.

Defense Manufacturing

Supporting defense contractors with precision-machined components, material traceability, quality documentation, and ITAR-registered manufacturing capabilities.

Aerospace Manufacturing

Manufacturing precision aerospace components requiring tight tolerances, repeatable quality, and advanced inspection processes.

Rail & Transit Components

Providing production and aftermarket components for rail applications where durability, reliability, and long-term support are essential.

Mobile Equipment Components

Producing precision components for drivetrain, hydraulic, and power transmission systems used in demanding mobile equipment applications.

Quality & Certifications

Quality is integrated throughout every stage of the manufacturing process, from material receipt and production planning to inspection, documentation, and final shipment.

Quality Management Systems

ISO 9001:2015 Certified

Documented quality processes focused on consistency, continuous improvement, and customer satisfaction.

IATF 16949:2016 Certified

Supporting automotive and production manufacturing requirements through disciplined process control and risk management.

AS9100D Conforming

Meeting the quality expectations of aerospace and defense manufacturers through advanced quality planning and traceability systems.

Government & Defense Readiness

ITAR Registered

Supporting defense-related manufacturing programs requiring regulatory compliance and controlled information management.

CMMC Level 2 (Self)

Demonstrating commitment to cybersecurity requirements supporting defense manufacturing environments.

WBE/WOSB Certified

Certified woman-owned business supporting supplier diversity initiatives.

Small Business Enterprise (SBE)

Recognized small business manufacturing partner capable of supporting both government and commercial programs.

Quality Performance Metrics

> 96%
On-Time Delivery

Delivering production components when customers need them.

< 1%
Internal Scrap Rate

Demonstrating disciplined manufacturing processes and continuous improvement.

< 100
DPPM

Maintaining exceptional quality performance through proactive process control.

First Article Inspection & Traceability

FAI, FAT & CoC Documentation

Supporting customer quality requirements with comprehensive inspection and documentation packages.

Material Certifications & Traceability

Maintaining traceability from raw material receipt through finished component delivery.

How We Solve Manufacturing Challenges

Every manufacturing challenge is unique. Rathburn works alongside customers to develop practical, production-focused solutions that improve quality, reduce costs, and support long-term success.

RATHBURN /
THREE DAUGHTERS CORP. CAPABILITIES STATEMENT

Corporate Information

CAGE code:

1SRL2

UEI:

SECPR1NJ9M26

DUNS:

#16 751 0833

Primary SIC:

3599 Industrial and Commercial Machinery and Equipment, Not Elsewhere Classified

Primary NAICS:

332721 Precision Turned Production Manufacturing

Other NAICS:

332710 Machine Shops

Primary UNSPSC:

73181000 Machining Services

Other UNSPSC:

73181001 Turning Services

WBE/WOSB certified

CMMC Level 2 (Self)

ISO 9001:2015 quality certified

IATF 16949:2016 quality certified

AS 9100D quality conforming

ITAR registered

Brochure

RATHBURN

Rathburn Precision Machining Brochure

Frequently Asked Questions

Our core capabilities include:

  • CNC horizontal turning
  • CNC vertical milling
  • CNC horizontal turning with live tooling, including Swiss machining
  • Wire EDM

We also offer secondary services including:

  • Assembly
  • Laser marking
  • Management of outside processes including specialty machining, grinding, heat treatment, black oxide, anodizing, e-coat, passivation, sinker EDM and other processes and coatings

We can provide support of new projects with prototype-to-production machining. Much of our work is repeat batch production, where we can scale up or down as customer demand changes month-to-month or year-to-year, with a range of 100 to 200,000 EAU.

Our outside diameter range for turning is 10” maximum for chucker work with length dependent on geometry. Our Swiss small diameter machining goes up to 32mm. Automated bar-fed lathes run up to 3” and gantry lathes process up to 8” diameter. Our envelope for milling is 20 × 20 × 20 inches. Our maximum ideal part weight is 30 lbs but we do process small quantities of larger parts.

Our standard tolerance for machining and measuring is ±0.001” standard with ±0.0005” achievable, depending on the application. Standard finish is 64Ra and 32Ra is achievable; finer finish is available through trusted local grinding sources.

We are able to process:

  • Aluminum
  • Steel (carbon and alloy)
  • Stainless steel (including Nitronic 60 and 4140 PH)
  • Tool steel
  • Cast iron (grey and ductile)
  • Brass
  • Inconel 625
  • Monel 400
  • Delrin
  •  

We work from bar stock, tubing, plate, sand castings, die castings, forging and extrusions. We often manage and machine customer-supplied raw materials as well.

Yes. Our engineering team actively works with customers early in the process to identify opportunities to improve part designs for machinability, reduce cost, and solve manufacturing challenges — functioning as an agile partner, not just a supplier.

For example, we have experience helping customers identify and resolve tolerance stack-up between our parts and mating parts. We have also helped other customers with reverse engineering and improving part life through alternative material selections. Where possible, we review part application with the customer and make suggestions as to how machining quality or costing can be improved.

Request A Quote

Ready to Discuss Your Next Project?

Whether you’re launching a new product, transitioning production from an existing supplier, or looking for a manufacturing partner capable of supporting long-term production requirements, Rathburn is ready to help.