CAD Tools

Surface Roughness Symbols on Engineering Drawings: ISO 1302 Guide. Covers The Basic Surface Texture Symbol, Placing Values on the Symbol: ISO 1302 Layout.

Learn to read weld symbols on engineering drawings: arrow side vs other side, fillet and groove symbols, and the key differences between AWS A2.4 and ISO 2553.

ISO and ASME geometric tolerancing are not interchangeable. Compare Rule 1 vs the envelope principle, MMC and LMC modifiers, profile and composite tolerances, and datums.

First Angle vs Third Angle Projection: How to Tell Them Apart. Covers The Concept of Projection Quadrants, First Angle Projection: The European Method.

Runout vs Total Runout: Circular and Total Runout Explained. Covers The Datum Axis: Runouts Foundation, Runout on Face Surfaces.

Flatness, Straightness, and Cylindricity: When to Use Each. Covers Form Tolerances: No Datum, Intrinsic Control, Straightness: Line-by-Line Control.

Set up A, B, C datums correctly: datum features vs datums, the 3-2-1 locating principle, choosing primary, secondary and tertiary datums, datum targets, and FCF usage.

True Position Tolerance: Understanding Bonus Tolerance and MMC/LMC. Covers Position Callout Anatomy, Bonus Tolerance: The Core Concept.

GDT Symbols Explained: All 14 Geometric Tolerances with Examples. Covers Profile Tolerances, GDT Symbol Quick Reference, Choosing the Right Symbol.

Engineering drawings are the universal language of manufacturing — if you cannot read them accurately, costly errors in ...