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Built for engineers who need fast, reliable answers. No sign-up, no clutter — just the tools you need, when you need them.
True position, MMC/LMC bonus, ISO fits, tolerance stackup, GO/NOGO gauges, runout, projected zones, datum shift, profile of a surface and process capability — 10 interactive calculators for geometric tolerancing.
10 LIVEConvert between metric and imperial for length, angle, surface finish, temperature, thread pitch, hardness and weight — 7 converters, instant results.
7 ACTIVEPlain-language explainers for all 14 GD&T characteristics, datum references, tolerance zones and MMC/LMC modifiers — with worked examples throughout.
14 CHARACTERISTICSCMM programming reference covering machine types, probe selection, measurement point counts, PC-DMIS syntax and GD&T evaluation on a CMM. Gauge R&R and more in development.
REFERENCE LIVEStep-by-step MCOSMOS alignment sequences for 5 common part types — flange cylinders, rectangular blocks, circular disks, 3-2-1 setups and turned parts — each with an annotated engineering drawing.
5 EXAMPLESHow to read engineering drawings — ISO vs ASME standards, first and third angle projection, title blocks, and a full breakdown of the feature control frame compartment by compartment.
GUIDES LIVEInteractive 2D engineering sketch tool — draw part outlines, add dimensions, GD&T feature control frames, datum labels and surface finish callouts. Export as a PNG or print direct from the browser.
INTERACTIVEMore Coming Soon
New tools, calculators and reference guides are always in development. Check back regularly — this site is continuously growing.
IN DEVELOPMENT