Business Services

High precision CNC machining center 5 axis working on an aluminum automotive part

Engineering and Tool Manufacturing

Princeton Tool employs a professional and dedicated engineering staff supporting all business units of Princeton Tool. From the design of complex ceramic core and wax tooling to fixtures and gages. Our engineering group works closely with our customer’s engineering staff to assure the final product satisfies requirements and specifications required. A robust approval process confirms the customer has visibility on final design prior to start of manufacturing. NIST controls in place to secure all data transfers with revision control history maintained on all product.

A CNC milling machine rough cutting cutting the mold parts with a radius indexable tool


  • Unigraphics NX (Design and Manufacturing)
  • SolidWorks
  • Camplete (Crash detection software)
  • Geomagic

Princeton Tool Tooling has over 350 years of combined knowledge and expertise in design and manufacturing of complex investment casting tooling. The manufacturing of your tooling is driven by our quality system and AS9100 certification along with lean six sigma methodology.

A 5 axis CNC milling machine cutting automotive mold parts with solid ball endmill tools

Services Include:

  • Reverse Engineering
  • Injection Molds (Wax/Plastic)
  • Ceramic Core Dies (single and multi-plane hydraulic)
  • Wax Pattern Dies (straight open & radial style)
  • Single Shot – Multi Vane Wax Dies
  • Gate and Runner Dies
  • Wax Chill Dies
  • Hydraulic Fixturing
  • Wax Pattern Reforming Fixtures
  • Ceramic Core Reformers and Setters
  • CMM Fixtures
  • Miscellaneous Specialty Fixtures and Gages
  • 100% Blue Light Inspection / CMM Inspection on all tool manufactured

Our skilled engineers and toolmakers design and manufacture tooling to exceed your expectations.

Princeton Tool actively participates and acknowledged by the NTMA for its apprenticeship program preparing for the future.

Layout Services

Using a rod with a small pink glass bead on the tip to inspect the parts of a turbine

With over twenty years of part inspection supporting our machining business units, our layout team is well versed in the inspection of precision manufactured components. Once your script has been created, it is filed and stored for future inspections. Our system is setup to support full production capabilities and short-term surges as needed. When applicable, as we machine customer product, the decision to move product into layout at Princeton Tool allows for a continuous progression towards shipping a completed product. This not only saves a tremendous amount of time but allows us to closely monitor product conformity.

Services include: 

  • FAI Layout AS9102 Revision B
  • Probability Studies
  • Part Inspection/Statistical Analysis
  • Balloon Drawings (digital)
  • In Process and Final inspection of Die Components
  • Source Inspection reports and Documentation
  • Reverse Engineering
  • Complex Assembly Scanning with Digital Assembly
  • Fixture and Gage Inspection
  • Periodic Calibration
3D printed piece with the number 5 written on it on the the 3D printing platform
Engineering 3D measurements for plastic moldings with computer screens on a desk


  • Blue Light ATOS III, Triple Scan Digitizing Unit
  • LK Evolution & Altera 10.10.8
  • CAMIO Multi-Sensor CMM Software
  • GOM Inspect Professional Software
  • Discus (2d/3d – Ballooning & Reporting)
  • 4 Axis Wire EDM for sections and filets
  • Geomagic Studio

Wax Injection / Dress / Assembly

With the services available in both the pre- and post-cast state, Princeton Tool can work with engineers in the early concept stages to make sure that tooling can be manufactured, patterns can be produced, and gating can be removed as desired. We believe that our services combined provides us with a competitive advantage. We have a deep understanding in each of the crucial stages of the products lifecycle.

The Princeton Tool wax department now employs over 60 individuals dedicated to processing customer product in the aerospace, industrial gas turbines and medical industries. In addition to its dedicated staff it provides state of the art radiographic inspection, ultrasonic wall inspection, CMM and blue light interrogations, 12 wax presses and 30,000 square feet of manufacturing space.

    Princeton Tool’s wax department services include, but not limited to, the following:

    • Single shot tooling for multi-vane configurations
    • Blades/vanes – cored and solid
    • Soluble/wax assemblies for complex geometries
    • 360° nozzle assemblies
    • Dip-ready molds
    • Ceramic core prep
    • Platinum and oroflex pinning
    • X-Ray and ultrasonic wall thickness inspection
    • Gate/auxiliary Tooling
    • Certifications including AS9100 Rev D/ NADCAP certification currently pending.
    • Wax Presses up to 50 ton (12 to 50 ton)
    • Temperature controlled shipments cross country with temperature/humidity monitoring
    • Serialization pattern / mold
    • CMM / Blue light inspection of patterns
    • Histograms and trend analysis on dimensional aspects of the pattern

    Precision Machining

    Precision machining has been the driving force behind our growth at Princeton Tool. Within our 80,000 ft² we offer a substantial amount of manufacturing space and flexibility to move product in conjunction with our customer’s schedule.

    Once Princeton Tool takes receipt of your castings, product is loaded into the internal machine monitoring tracking system and pushed to the first operation on the router card. In most cases, the first operation is completed through waterjet. A safe and fast way of removing large amounts of material while reclaiming high valued raw material for customers, previously lost to cut off and grinding equipment.

    Electrical discharge machine spark eroding with water process machine die mold in workshop
    Liquid cooled CNC milling machine rough cutting mold and die parts

    Once the casting has processed through waterjet the next rough operation is grinding. This allows for a quick removal of material to a finish state, where casting geometry allows it. If machine areas are restricted or have contour, EDM and CNC operations would be required for the removal of unwanted material. This allows for precision and certainty in complex and contoured areas. In some cases, not all previously mentioned operations will be required. A great example of this would be product we manufacture direct from raw material for our aerospace OEM customers.

    Sophisticated machining options, such as EDM (Electrical Discharge Machining), is an efficient method of metal removal to address complex or critical areas. Electrodes used to perform these operations are designed by our onsite NPI (new product introduction) team, programmed and machined onsite at each of the Princeton Tool facilities. Current EDM operations are supported by over 70 pieces of equipment staffed around the clock. Equipment can accommodate parts more than 4’ with a surface finish from recast less a thousandth. This recast can be eliminated with a single blast operation

    The CNC machining is supported by over 50 machining centers. Versatility in operations with 3, 4 and 5-axis capability, both vertical and horizontal formats. These machining centers offer another machining option when it comes to controlling tight tolerances machining on either standard or exotic materials.

    Gas turbine engine inside pressurized enclosure with a golden light reflecting off the pipes

    With increasing demands in tolerances and the understanding that each casting is unique, we have been able to introduce our “Adaptive Machining” process. This strategy supports critical and close tolerance areas by machining each part unique to itself. The process captures the true part geometry and generates CNC code specific to the piece in review. This powerful tool compensates for variation in tight tolerance areas that requires a higher level of attention. In many cases the adaptive machining eliminates further hand finishing and can be inspected at this time for shipment. Once customers are made aware of this capability and the benefits that come from the implementation of this machining strategy, programs are transferred to adaptive machining. Once implemented, most customers see throughput improvements that eliminate days or even weeks from the entire manufacturing process

    Our dedicated team of process engineers, production managers, and machine operators work to meet customer specifications while keeping quality and continuous improvement in mind.


    The development of our customer’s product has always been an essential component of a successful program kickoff. We take significant measures in the early phases to full proof programs and procedures previous to entering our production department.

    Developing over a thousand machining processes a year, our system is designed to streamline new product introduction in an expedited manner while still following all protocols and quality requirements. In 2013, we expanded our floorspace to accommodate a dedicated development workspace. We invested in duplicate equipment and quick change fixturing to make sure the transition to production is seamless. This decision has produced a substantial savings in both time and cost and allows our team to focus on producing reduced cycle times and quality to your programs.

    Our development services include:

    • Development of machining process
    • Development of AS9100 documentation
    • Development of machine programs for all process
    • Development of electrode programs and redress programs
    • Completion of process capability analysis
    • Completion of gage R&R
    • Completion of FAIR on machined surfaces

    Turbomachinery Components and Assemblies

    Looking upwards at a space rocket from the view of the platform

    Paragon Precision Inc., doing business as Princeton Tool, has 75 years of 5-axis machining experience in turbomachinery. We specialize in 4 and 5 axis machining of complex and highly contoured precision products. Paragon Precision is recognized as a primary source for turbomachinery components and assemblies for world-class quality. Experience with development and production batches. For more information on Paragon Precision, please feel free to visit:

    Industrial CNC milling machine working on a turbine with seven jets of water flowing over the process

    Our products consist of such items as blades, vanes, blisk, rotors, nozzles, fans, impellers, inducers and exducers. Statistical analysis controls combined with our AS9100D quality management system allows us to monitor your product before shipping.

    Close up of chc machining in blue light with sparks flying

    Paragon Precision has further expanded into general industrial applications.  Products include finned rotating turbocharger sub-assemblies for internal combustion engines, pressurization systems, centrifugal air filtration, fluid drive units, valve bodies, manifolds, housings, chassis, and natural gas processing systems.

    CNC milling manufacture of an impeller

    Paragon Precision and Princeton Tool is designed to support customers’ deliveries. With over 160 CNC machines and five facilities we can control product flow to meet and or improve your scheduled deliveries.