Attalos

Engineering Insights

Engineering references, material notes, and practical technical explainers.

PLA 3D Printing Strength: Infill, Layer Height, Speed and Walls cover image

PLA 3D Printing Strength: Infill, Layer Height, Speed and Walls

See how infill, wall count, layer height and speed affected PLA strength in ASTM D638 tensile and ASTM D790 bending tests, with practical settings.

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Interactive battery reference tool comparing AA battery chemistry, voltage and IEC codes

Battery Sizes, Names, Voltage and Chemistry: A Practical Guide to IEC Battery Codes

A practical engineering guide to battery formats, IEC naming, chemistry, voltage, dimensions, safe substitution, and responsible disposal.

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Diamond vs Steel Files: Coarseness, Uses & Buying Guide cover image

Diamond vs Steel Files: Coarseness, Uses & Buying Guide

Compare diamond files vs steel files, learn D value grit ratings, file cut equivalents, best uses, care tips, and how to choose the right file.

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