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Tolerance & Fit Simulator
Dial in clearance for press, snug and loose fits.
Design this fit
Target window
0.1mm – 0.25mm
Slides together with light effort, no wobble. Used for alignment pins and lids.
Designed gap0.20mm
− printer expansion0.12mm
Real gap0.08mm
❌ Too tight — the parts will fuse together. Add more designed clearance.
Key lesson: a printer never makes the exact size you draw. Always design the gap, then subtract real-world expansion.
💡 This lab is also embedded inside the lessons that teach its concepts. Your best scores count toward badges and XP.