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The physics of Lego bricks
Discover the incredible physics, material science, and precision engineering that allow Lego bricks to click together perfectly and last for generations.
4 chapters75 assets
by lego · Aug 9, 2026
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Chapter 1
Clutch power and friction
1The mechanics of interference fit
2Friction as the silent glue
3The satisfying click sound
4The secret of clutch power
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Chapter 2
The magic of ABS plastic
1The recipe for ABS plastic
2Why Lego bricks never rot
3The bounce-back memory of plastic
4The painful truth of stepping on a brick
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Chapter 3
Extreme precision engineering
1The two micrometer rule
2High pressure injection molding
3The life of a mold
4Universal compatibility across decades
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Chapter 4
Structural limits and giant builds
1The ultimate Lego tower limit
2The force of gravity on plastic
3The strength of a single brick
4The challenge of horizontal spans
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