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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.
GD&T Calculators
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 LIVEUnit Conversion
Convert between metric and imperial for length, angle, surface finish, temperature, thread pitch, hardness and weight — 7 converters, instant results.
7 ACTIVEGD&T Reference
Plain-language explainers for all 14 GD&T characteristics, datum references, tolerance zones and MMC/LMC modifiers — with worked examples throughout.
14 CHARACTERISTICSCMM Resources
CMM 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 LIVEDatum Alignment
Step-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 EXAMPLESDrawing Help
How 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 LIVE