"Technical skill is mastery of complexity, while creativity is mastery of simplicity."

Erik Christopher Zeeman

Computer Aided Design (CAD) Services

Proof Engineering offers general CAD design and drafting support, allowing you to focus on your core business and letting us worry about technical documentation. Engineers at Proof utilize advanced CAD tools on a daily basis to design machinery, conceptualize, and/or develop specifications for fabricators and production manufacturers. Additionally, we offer stand-alone CAD services for projects that may be limited to design and drafting. For instance, a customer may have a sketch of a plastic part and would like a 3D model created for a Powerpoint presentation. Or, perhaps they would like to prototype the part using a rapid prototyping process in order to visualize the part and hold it in their hands before proceeding with the design. In some cases, the customer may want to prototype or even manufacturer the part in high volumes and therefore a detailed drawing is required. No matter what your CAD needs are, the engineers at Proof will meet your requirements in a timely and efficient manner, allowing you to achieve your goals.

At Proof Engineering we know that documentation is often the most important part of the engineering effort - the part is only as good as the drawing. To this end, we ensure that parts and assemblies are detailed correctly with the appropriate amount of tolerance to minimize part cost. With years of experience using ASME Y14.5M-1994 GD&T standards, we can offer manufacturers improved flexibility while ensuring that parts always function properly. Our design services include:


•Reverse engineering parts and assemblies to provide drawings
•Performing tolerance stack-ups to improve part quality
•Converting 2D data (drawings or CAD data) into 3D CAD for optimization, motion studies, interference detection, visualization purposes, as well as to create detailed drawings for manufacture
•Checking existing drawings for completeness, tolerancing, clarity and adherence to customer standards


Our design processes and attention to detail ensure that drawings are done correctly the first time.

Part and Assembly Modeling

Proof Engineergs can model and specify the most advanced products using state-of-the-art CAD software, offering the following services:

  • 3D solid modeling
  • Large assemblies
  • Advanced surfacing
  • Sheet metal
  • Weldments
  • Molds for plastic or metal parts
  • Piping/tubing designs
  • Electrical cable/harness and conduit designs
  • Motion studies (kinematic simulation)
  • 3D modeling for videos and presentations
  • Reverse engineering

Drafting and Technical Documentation

Ensure your design can be efficiently produced before it reaches manufacturing. We offer:

  • Technical drawings
  • ASME Y14.5M-1994 GD&T
  • Specification writing
  • Drawing checking
  • Conversion of Autocad drawings from 2D to 3D
  • Drawings for prototyping, fabrication, and low/high volume manufacturing

White Papers

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Client Testimonials

Pete Secor, President of Evergreen Telemetry:


The professionals at Proof Engineering deliver excellent service and support.  They are proficient and prompt when designing and fabricating in both plastic and metals.  The engineers at Proof take the time to discuss project goals in depth so they can offer the best all-around solution.  Because they operate as if they are an extension of in-house engineering at my small company, I'm giving them an increasing share of our design work.

Home | Structural |Mechanical |CAD| New Product Development | Prototyping

Proof Engineering Co. | 1135 N. McQueen Rd. Suite 131 Gilbert, AZ 85233 | (480) 478-0041