Machining Leader

fathom logo design in black color

Who is Fathom Digital Manufacturing? One of the largest on-demand digital manufacturing platforms in North America.

Precision CNC Machining

We leverage advanced milling and turning machining centers for high-to-medium volumes.

Prototype Parts and Components

We deliver complex and innovative products with high efficiency.

Wire & Sinker EDM Cutting

We maintain multiple Wire & Sinker EDM cutting solutions.

From Chicago to the World

We bring world-class manufacturing from the Midwest to the world.

Precision Process Corporation

Precision Machine Shop Serving Chicago to the World

Established in 1987, Precision Process Corporation (PPC) is a manufacturing company that offers integrated engineering-to-production services. PPC specializes in prototype, small-run to mass production of parts and components for medical, technology, automotive and metal stamping industries. PPC delivers complex and innovative products with high efficiency and high-quality standards while remaining cost competitive.  

We offer project management, engineering support, production and quality control of all parts made in-house and we stay abreast with current technologies. This allows us to deliver complex and innovative products with high efficiency. We are known for competitive costs and high quality.

Photos from the Shop



At Precision Process Corporation by Fathom, engineering support is with you every step of the way: from design concept validation, to prototyping, to production release. Should changes be needed, our engineers help to streamline the process to ensure manufacturability and timely project completion. Together with our manufacturing capabilities, our innovative designs can become functional prototypes for your research and development goals.

Our design capabilities are supported by a full range of tools to transform ideas into workable models:

  • Mechanical Desktop
  • Auto Cad
  • Virtual Gibbs
  • Solid Works
  • MasterCam
  • Esprit
  • Datalyzer
  • SPC Control

Quality Control

Precision Process Corporation by Fathom provides 100% quality control on all products and strictly adheres to quality assurance procedures pursuant to ISO 9001:2015 Design certification. Fathom Manufacturing’s extensive certifications include ISO 9001:2015, ISO 9001:2015 Design, ISO 13485:2016, AS9100:2016, NIST 800-171 and ITAR.

We widely use latest state-of-the-art CMM Brown and Sharp 7.10.7 with continuous touching probe. Depending on the project, we also use CMM Mitutoyo BH506 and 20X comparator with Tracer, Jones and Lamson FC-30 (with digital readout QC-2000).

Our metrology lab is equipped with three state-of-the-art CMM machines, visual inspection system, optical comparators and other standard measurement equipment, all calibrated according to the ISO 9001 recommended schedule.


Fathom Manufacturing’s production facilities can meet a wide range of requirements for unique geometries, profiling, turning, grinding, 3D milling, 4X milling with extremely tight tolerances. Utilizing the tool paths downloaded from our CAD/CAM software system, our CNC mill and lathes produce a variety of precision parts in parallel operations resulting in significant time savings.

PPC has expertise in processing the following materials:

  • Tool Steel
  • Exotic Material – Incoloy, Kovar, Alloy42, Molybdenum, etc.
  • All Types of Stainless Steel – 304, 316, 410, 440, 17-4
  • Aluminum, CR and HR steel
  • Plastics and Ceramics


By combining CNC machining and high precision grinding in one room, PPC provides increased control, quality assurance and efficiency that result in lower production costs.

We offer a full range of capabilities:

  • D. Grinding
  • Center-less Grinding
  • Surface Grinding
  • Blanchard Grinding
  • Our equipment enables us to grind multiple diameters in one plunge and produce mirror-like surface finishes. Using automated lateral locators assures precision on grind radii and lengths to the tightest of tolerances, even on materials such as Ceramic and Carbide.

We use the following equipment in our grinding work:

  • Toyoda 45 M Select G100
  • Okomoto CNC I.D. Grinding IGM 15NC
  • Cincinnati Surface Grinding Machining
  • Okamoto Surface Grinding
  • Brown & Sharpe #1 Universal Grinding 10 x 20

Wire Cutting

Precision Process has the capabilities to do both wire EDM and small hole EDM, working with a range of metal alloys.

Wire EDM Capabilities:

  • Wire diameters range from .002″ to .012″
  • Accurate tapers of up to 30 degrees
  • Maximum cutting size: 12″ x 18″ x 10″
  • Maximum work piece size: 24″ x 30″ x 10″
  • Small Hole Capabilities:
    • Deep holes through hard alloys, from all angles, using 0.004″ to 0.250″ diameter electrodes
    • Depths of 50 to 300 times
    • Virtually Burr-free

For the most complicated applications, PPC uses the Mitsubishi Electrical Discharge wire cutting machine, Model FX10K and the Mitsubishi Electrical Discharge wire cutting machine model, FA – 10 and Electrical Discharging machine model FA-20 with Cad system. We also have conventional EDM machinery (Sodick NC Model AQ 35L) and hole popping ED2000M.

This equipment enables us to keep very tight tolerances and develop excellent surface finishes, where they are required.

Conventional EDM (Sinker EDM)

Sinker EDM machines utilize linear motor technology with high accuracy that allows to produce fine finishes. Up-to-date control and EDM automation capabilities with superior power supply make these sinker EDMs the ideal choice for tight-tolerance applications including die and mold.

Sinker EDM literally “sinks” (plunge) a required shape into the workpiece.


Maxstar 200 Series with DIG control allows the arc characteristics to be changed for specific applications and electrodes.

Location and Services

Precision Process Corporation is located in Elk Grove, Illinois but services all the following local areas and more: Illinois – Chicago, Aurora, Naperville, Joliet, Rockford, Springfield, Elgin, Peoria and Champaign; Indiana – Gary, South Bend, Fort Wayne and Indianapolis; Wisconsin – Madison, Milwaukee, Racine and Kenosha; Iowa – Davenport, Iowa City and Cedar Rapids. Additional areas can receive drop shipped parts or be served by other Fathom facilities that span the entire United States across the areas of additive, CNC machining, injection molding, sheet metal fabrication and over 25 different manufacturing processes.

About Precision Process Corporation

Over the last 30 years, we have grown in size and in capabilities. Our team of 7 employees in 1987 has now reached 42, and we continue to evolve and grow. As part of Fathom Digital Manufacturing, PPC by Fathom has access to a robust nationwide network of comprehensive additive and advanced manufacturing capabilities.

From engineers and technicians to office staff, we set our professional goals high, with exceptional client services at the heart of every task. We believe that the key to our company’s success is dedication and attention to every single step in production. From the first request for a quote to turning drawings into real parts to doing quality inspection and finally to ensuring on-time delivery; each task is carried out with priority to quality.

We believe that investing in newest technologies improves both quality and productivity.

Our metrology lab is equipped with three state-of-the-art CMM machines, visual inspection system, optical comparators and other standard measurement equipment.

Our new facility enables us to complete almost any type of tool and die work for both small-run and mass production.

Our employees are passionate about what they do and they give their energy and focus to helping reach our company’s goals.

Industries We Serve

Our strength is in creating prototypes and in manufacturing both small-run and mass production of parts and components for the medical, high-tech, automotive and metal stamping industries as well as electronics.

Materials We Work With

We offer extensive experience in working with different varieties of stainless steel, Inconel, Kovar, titanium, TZM, aluminum as well as tool steel and plastics.


“We choose Precision Process because of their reputation as a great company to do business with. We have stayed with them for over 5 years because they consistently deliver to meet our needs.” – Barbara Gramenz, 3M


“No matter how complex or how new issues are with product design, we can always count on PPC. Michael provides an unbiased, “out-of-the-box” professional opinion that is always forward-thinking, interesting and helpful. We value PPC’s exemplary commitment to providing superb engineering.” – Rich Rayhill, Crown


“PPC’s engineering experts understand design for manufacturability. They ensure that the integrity of our designs are maintained as we move to prototyping and then to the completed component.” – Shane Zoglman, Fortune Grotness


“Precision Process is a vendor we turn to over and over, superior workmanship and fair pricing.” – John Miksula, B-Way


“I want to show my appreciations for a great service PRECISION PROCESS CORPORATION is providing for Ardagh Technical Center (formerly Rexam Technical Center). Even when we order parts on short notice we are always very impressed with the quality and on time delivery. As always, it shows your commitment to customer service and quality of your services. I sincerely appreciate your responsiveness and the way you conduct business overall. We look forward to doing business with you for many years to come.” – Piotr Borer, Ardagh Group


We are honored to have been nominated to Ring the Bell for small business. And we made sure our name rang out loud and clear across the country on December 21, 2016 when we Rang the Morning Bell on a billboard in Times Square.

We are grateful to JP Morgan Chase for choosing PPC as fast growing manufacturing company to participate in this exciting campaign celebrating small businesses in America.

Precision Process Corporation


Precision Process Corporation by Fathom Linecard / /


Contact Us

Precision Process Corporation by Fathom

1401 Brummel Ave
Elk Grove, IL 60007

Phone: 847-952-8088
Email: sales.elkgrove@fathommfg.com
Fax: 847-952-8121

Manufacturing Locations Across National Time Zones
Manufacturing Locations Across National Time Zones
The Fathom Advanced Manufacturing Platform
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1050 Walnut Ridge Drive
Hartland, WI 53029
ISO 9001:2015


444 W. 21st St. Ste. 101
Tempe, AZ 85282
ISO 9001:2015
NIST800-171 Compliant


7770 Washington St.
Denver, CO 80229
ISO 9001:2015


13758 Johnson Street NE
Ham Lake, MN 55304


1801 Rowe Lane
Pflugerville, TX 78660
ISO 9001:2015

1513 Sam Bass Rd
Round Rock, TX 78681
ISO 9001:2015
ISO 13485:2016


46758 Lakeview Blvd,
Fremont, CA 94538
ISO 9001:2015 Design Certified
NIST 800-171 Compliant


14000 N.W. 58th Court
Miami Lakes, FL 33014


1920 Slaterville Rd
Ithaca, NY 14850

401 W. Shore Blvd.
Newark, NY 14513
ISO 9001:2015


1207 Adams Drive
McHenry, IL 60051
ISO 9001:2015

1401 Brummel Ave
Elk Grove, IL 60007
ISO 9001:2015 Design Certified

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