Precision CNC Machining

Throughout our 25 years in high-tolerance CNC machining, Shields has offered our expertise to clients on ways to make their CNC machined parts easier to manufacture, more cost-effective, and still exceed their specifications for quality. Success to us is a satisfied customer and end user as well.

Tolerances and Materials

We have over 25 years of experience in producing high tolerance CNC parts in: titanium, aluminum, steel, and semi-conductor plastics. At each step we offer expert collaboration in CNC machining and precise inspection.

We can produce materials to the following tolerances:

  • True Position .001, 3 Surfaces on Hole Location
  • Diameter +/- .0001 Bores or O.D.
  • Thickness +/- .0002 Aluminum, .0001 Steel
  • Parallelism .0002 Aluminum, .0001 Steel
  • Flatness .0002 Aluminum, .0001 Steel
  • Perpendicularity .0002 Aluminum, .0001 Steel
  • Concentricity .0002
  • Profile of any Surface .0002
  • Cylindricity .0002

Our Major Equipment

  • Makino D500 5 Axis Vertical Machining Center and Makino A51 Horizontal Machining Center with MMC2 32 Pallet Stocker
  • 400mm Hitachi Seiki Horizontal Machining Center
  • 22 – Vertical Machining Centers ranging from 30″ x 16″ through 64″ x 32″ of travel
  • 4 – Haas 5 Axis Trunnion Tables
  • 3 – Haas 4th Axis Indexers
  • 6 – CNC Lathes ranging from Small Collet Nose
  • all the way up to 15″ diameter Chuck w/ Live Tooling
  • Onsrud 3 axis table Router
  • 4-UMC 750 5 axis machines

Programming Software Capabilities

Shield’s software and program services are capable of handling a wide variety of design challenges. Shield’s team has a diverse array of expertise.

Software Expertise:

  • Mastercam – 2017
  • Solidworks – 2016
  • ICAM – Ver. 21


Electro-Mechanical Assembly

Our opto-mechanical assembly team has the capability, skills and experience to assemble your entire custom product. Or we can provide you with a finished sub-assembly, including testing for final integration into your CNC machined components.

Using purchased CNC machined components per your specifications, we will provide you with the highest quality finished assemblies. You get extremely competitive pricing and excellent quality from our own precision machine shop.

Facilities and Capabilities

Our facility has three class 1000 clean rooms with class 100 flow benches.

Our test and measurement equipment list includes a Zygo Interferometer, a lens centering station and an optical test bench used for alignments.

Optical & Opto-Mechanical Assembly

We have experience in building optical assemblies from the DUV to IR wavelengths. We take quality very seriously, keeping records of lots and serials numbers, and providing certificates of conformance on request.

We also offer complete assembly for mechanical and electro mechanical assemblies with the same high standards as our opto-mechanical department. We often collaborate with our customers from prototype to end-of life for their custom components. This includes assistance in the design and build of custom test benches for use in product that we build.

Plastic Fabrication

When starting a new CNC plastic fabrication project, plastic CNC milled prototype parts ensure a component’s design is sound. For most CNC milled plastic components a CNC machined prototype will provide what is needed for testing.

The CNC machine process is perfect if you need small runs, so it may be a cost effective route for your budget.

CNCs dedicated to plastic fabrication

  • Reduced risk of contamination
  • Shorter lead times
  • Specific tooling for plastic

Plastic CNC Machining/Fabrication

Dedicated CNC machine centers for plastic part production.

Fabrication services include:

  • Butt fusion welding
  • Extrusion welding
  • Heat bending
  • Hot air welding
  • Infrared welding
  • Polishing
  • Solvent cementing/bonding
  • Socket welding
  • UV Cured Adhesives

Piping and Plumbing

Flexible tubing assemblies built to spec:

  • PFA Tube Bending
  • PFA Tube Annealing
  • PFA Tube Flaring
  • PFA Tube Bonding and fitting installation

Hard Plumbing Assemblies built to specs using:

  • Polypropylene
  • PVDF
  • PFA Tube Flaring
  • PFA Tube Bonding and fitting installation

Materials Experience

We have experience working with most plastic materials including:

  • ABS
  • Acrylic
  • CP7D
  • FM4910
  • PET
  • PFA
  • Polycarbonate
  • Polypropylene
  • PTFE
  • PVC & CPVC
  • PVDF

Quality: ISO 9001:2015 and AS 9100D

When Shields decided to apply for ISO registration, we felt it was important that our management be involved in every step of the process. In 2003 we were certified ISO 9001 by ITS Intertek. In our registration audit we had zero non-conformances. Since then, in our surveillance and recertification audits, we’ve had no major non-conformances. In 2019 Shields applied and became certified in AS9100D with TUV. The management team felt is was vital to expand our proven quality track record in ISO9001 and enhance our quality certifications to include the Aerospace standard.