Measured geometry of real objects.
1,832 free STEP/STL files across 341 objects. Dimension sheets free (CC BY 4.0). Generated from the standards; public CAD indexed with its license. Measured scans of devices on the way. How it's made · MCP + API for agents · Pricing
























































































































































































































































































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Build list: Alpha V-twin, two 10 mL syringes23 lineslistBuild list: Beta Stirling, rhombic drive, 2 in tri-clamp42 lineslistBuild list: Free-piston Stirling, 2 in tri-clamp (flexure-suspended)48 lineslistBuild list: Gamma Stirling, 2 in tri-clamp47 lineslistBuild list: LTD coffee-cup engine21 lineslistBuild list: Mug LTD (sits on a coffee mug)23 lineslistBuild list: Ross yoke alpha, two parallel 10 mL syringes29 lineslistBuild list: Soda-can gamma25 lineslistBuild list: Test-tube marble engine30 lineslistBuild list: Thermoacoustic standing-wave engine, 2 in spools24 lineslistBuild list: Tri-clamp elbow diaphragm alpha, 2 in43 lineslistBuild list: Tri-clamp tee diaphragm gamma, 2 in46 lineslistNASA and Sunpower free-piston Stirling references (public domain) and design numbers5 lineslistStirling engine configurations: which type needs which parts on this shelf14 lineslist