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The CNC DFM Guide
Your ‘don’t make the machinist hate you’ guide to CNC-friendly design
Cheatsheets
Tap & Drill Chart
A reference for choosing the right tap, drill size, and thread fit
GD&T Cheatsheet
A clear, quick-reference guide to every essential GD&T symbol
Weld Chart
A visual overview of common weld symbols, joints, and notation
Your go-to engineering Toolkit

100+

Tools & Guides
Engineering Guides
Injection Molding DFM Guide
Learn the core rules to make parts that mold cleanly
Sheet Metal DFM Guide
A Practical Overview to Build bends that shops love
CNC DFM Guide
A clear introduction to designing parts that manufacture reliably
The Basics of GD&T
A simple intro to geometric controls & 2D Drawings
The Basics of DFM
Foundations for designing manufacturable parts
Basics of Tolerance Stack-Up
How dimensions pile up—and why it matters
GD&T Symbols
Position
Exact location
Profile
Shape control
Flatness
Even surface
Straightness
Line accuracy
Parallelism
Constant spacing
Runout
Wobble limit
Angularity
Set angle
Perpendicularity
90° alignment

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Mechanical Engineering
May 28, 2025
Why your tolerance stack-up keeps failing & FREE spreadsheet to fix it
Mechanical Engineering
April 18, 2025
Why Your Dowel Pin Doesn’t Fit—and How to Fix It
GD&T
November 9, 2024
How to Read a GD&T Drawing: Insights from R. Dean Odell
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