Learn How a Modern Door Lock Works with this 3D Printable Pin Tumbler Lock Model

The modern tumbler lock is one of the most common mechanical devices in the world, but very few people know how they really work. The design was first patented in 1848 but is derived from concepts dating back as far as 4000 BC in ancient Egypt and it remains the most common method of securing doors. The mechanism uses spring loaded pins of varying lengths that prevent the lock from opening if the correct key isn’t used.
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