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Engineering Fundamentals Refresh: Strength vs. Stiffness vs. Hardness

Understanding the mechanical properties of strength vs. stiffness vs. hardness is foundational in mechanical engineering, yet these properties can often be confused. These properties are related, but there are very important differences between them: Stiffness is an indicator of the tendency for an element to return to its original form after being subjected to a […]

Article

Too Tight or Perfect Fit? When to Use Press Fits in Your Assemblies

Adapting to many situations, holding parts in perfect alignment, easily introduced but forming a lasting bond—I could either be describing press fits or your favorite pair of jeans. Press fits have so many great features, you might wonder why they don’t replace all other connections. The truth is, press fits aren’t for every application—just like […]

Article

How to Design Snap Fit Components

Designing components with snap fits can save you time and money in production by reducing material costs and part quantities as well as improving ease of assembly. While in the past injection molding has been the only viable method for producing snap fit joints in plastics, 3D printing opens up new opportunities and challenges in […]

Article

Slip Fit Tolerances and Geometry

We’ve explored interference fits and all their design limitations, but dowel pins have another application: slip fits. While interference fits create tight assembly tolerances, slip fits are just the opposite—they can easily give you a self-locating assembly, making manufacturing easier when needing close alignment. Want to know more? Read on! Slip Fit Basics Obvious from […]

Article

Nothing Gets In: Waterproof Enclosure Design 101 (and IP68)

Design guidelines for waterproof enclosure design, as well as IP68 waterproof rating design.

Article

How to Choose the Best Fasteners for 3D Printed Parts

We get a lot of questions on the best methods for fastening different 3D printed components. When prototyping hardware products, for example, you often need to make assembled structures that are more complicated than a single 3D printed component, like an electronics enclosure or robotic assembly. Other times, you may need to print components too […]

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