Oklahoma Locksmith Practice Exam

How many tumblers and springs are typically found in a standard 5-cut key cylinder?

1. 3

2. 4

3. 5

4. 6

The correct answer is: 5

In a standard 5-cut key cylinder, there are typically five tumblers and five corresponding springs. Each tumbler corresponds to a cut in the key, which controls the alignment of the tumbler to allow the cylinder to turn when the correct key is inserted. When the key is turned, the cuts push each tumbler up against the spring to a specific height, aligning them within a shear line. If all five tumblers are aligned correctly with their respective springs, the cylinder will rotate, allowing the lock to open. This design is integral to the functioning of the lock and highlights the relationship between the key and its mechanical parts, ensuring proper security and operation.