Why does every lock have a 'mysterious' small hole at the bottom?

When examining a regular lock, we may notice it has a small hole at the bottom. Of course, a padlock is a security device. Their basic structure includes a lock body and a shackle.

Padlocks are opened with a key, while code locks are opened by entering a combination of numbers. However, whether it is a key lock or a code lock, they may have a small hole at the bottom. What exactly is the purpose of this small hole?

Drainage

Small holes are often found at the bottom of the lock.

The small hole at the bottom of the lock acts as a drainage port when moisture enters the lock. But surely any lock will be penetrated by moisture. Without a dehumidifier, moisture inside could damage the lock's components. The presence of a drainage hole will prevent this from happening. Instead of accumulating inside the lock, moisture will escape through this small hole.

Rust prevention

Because it acts as a drainage port, the small hole at the bottom of the lock also helps prevent rust. Padlocks, especially industrial padlocks, are made of durable materials such as galvanized carbon steel. However, although they have been designed to withstand regular use, they are not immune to rust. Moisture can interact with iron and iron-based materials used to make locks, leading to rust and corrosion.

By allowing moisture to escape from the locks, the pinhole protects them from rust and corrosion. Moisture will escape from the small hole while minimizing the risk of rust and corrosion.

Lubrication

Another reason the lock has a small hole at the bottom is for lubrication. Locks contain mechanical moving parts inside the lock body.

Over time, some of these parts may become stuck, in which case it may be difficult to open the lock. Luckily, a little lubrication will usually solve the problem easily. Normally, one can apply or spray a small amount of lubricant into the lock body through this small hole itself .

The small hole can be a means of access to help open the lock in special cases.

Secondary access

Depending on the specific type of lock , the small hole can be a means of access to help open the lock in special cases. For example, when a homeowner loses their keys, they will have to seek the help of a locksmith. At this point, locksmiths can open the lock by inserting a special tool into this small hole. This is considered a trick.

In short, the small hole at the bottom of the lock serves several purposes. The main purpose is drainage. Without the small hole, moisture will build up inside the lock body, which can lead to problems like rust and corrosion. There are many different types of padlocks, but they usually have a small hole at the bottom to allow moisture to escape from the body of the lock.