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Anatomy of a basic open-shackle padlock

14th July 2005, Page 54
14th July 2005
Page 54
Page 54, 14th July 2005 — Anatomy of a basic open-shackle padlock
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The mechanism has five spring-loaded locking pins (1), which are lifted out of engagement by serrations on the key. allowing the cylinder (2) to rotate. Turning the key then slides one or two tongues (3) inward, releasing the spring-loaded hasp (4). In this relatively low security design, the body (5) and the twin-locking tongues are made from brass, which is relatively easy to saw or shear. Attack-resistant padlocks add one or more locking pins, replace the brass tongues with ball bearings, increase the diameter and material grade of the hasp and use hardened steel for the body, cylinder and locking pins.

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