what is a cruciform lock

What Is A Cruciform Lock?

Known also as a cross lock and Zeiss lock, this lock is so called because of its cross shape, it can also look like a plus sign (+). In fact, it looks like you can put a Phillips screwdriver in it. The cruciform lock makes mention of its name by the cross-block and “cruciform” meaning “to form or arrange on a cross. But in general, the name of this lock is so named because of its characteristic cross shape. But what is so special about this lock? Or how does it work? Then we will know a little more about this strange lock.

This lock is seen more than anything in the insurance of steering wheels for vehicles. If you have ever had one, try a little and notice the cross shape on the lock. These are also seen in some safes. Its implementation in safes was implemented thanks to the company SentrySafe, which discovered a way to open the safe in case of forgetting the password. However, there are few environments where you can see this type of locks, and this makes it one of the rarest and almost forgotten, like the tubular and barrel locks that very little is seen today. Although you have to consider that in some countries you can still find these locks, some because they are part of their history and others because they are still worth it. You can pay attention to the locks when you travel to other countries.

How do they work?
The operation of the cruciform locks occurs outside the cup bolt system. They have generally perceived more securely thanks to the four cutting lines. If you observe a cruciform key you will notice that it has a cross shape as well and that way each slot corresponds to a set of pins. Normally there are different lines of cuts, however, it can happen that all the pins are the same. The average minimum number of pins for a cross lock is 16, as long as it is well constructed. Some are safer than others and can have up to 20 pins (five on each side). It should be mentioned that the more pins there are, the longer it will take to make their way through the lock, you have to be careful if you have not had previous experience with these locks.

When the lock pins are different, there is always one that acts as a guide. This way you can know how is the correct entry of the key in the lock. In most cases, the key is marked and the lock also indicates the way in which the key must enter, as the key is oriented in the lock. It has a cross shape, which can mean that it has four ways to enter, but it will only open with the correct one. The purpose of this lock is to be more secure than traditional locks that have a unique way of entering, however, with this you can confuse the criminals and other people with the four possible ways to enter the lock.

How to Choose a Cruciform Lock?
There are three different ways on how to choose the correct cruciform lock.

  • Selection of Cruciform Block

For this selection it is necessary to know five main components the lock, which are:

  • Teeth: four spiked threads with tips similar to a half diamond, unlike the tip of the diamond, these would be rounded. They are made with cheap material and can easily break.
  • Tension points: four bars that fit in the lock to press the lock when the device is turned.
  • Tension wheel: turn the lock so that the lock is tightened.
  • Plunger: is what moves the teeth in and out of the lock. It is responsible for “cleaning” each keyway at the same time.
  • Threaded shaft and shield maintain tension teeth when pressed against the lock. Without this, the teeth break easier and faster.

Usually, these are the cheapest, its construction is quite simple. At any time you can break the tines or tension teeth, and it will not work again. The keyways can be adjusted because their size can vary, causing problems with some cruciform tips that may have on the locking assembly. You must be careful and check that the teeth fit well into the keyway. These can be wide or narrow.

  • Trial Cruciform Locks

These cruciform locks are not very effective. They can be used as a rake or as a trial lock. With this lock, you can restrain the key actions in a similar way to the blockage of blows. It has a key that is pulled out of the lock with a click and then pushed in and rotated simultaneously. In general, this type of lock is not recommended, because they can be very problematic, avoid getting these locks among your options.

  • SPP

Single Pin Picking, it can be the type of cruciform lock ideal for you, with it can be very difficult to tighten the lock. Regardless if all four sides have active pins, the key can block the access with a set of pins. Even if you do not have four cutting lines it can be more difficult to find a voltage wrench of the same size or similar. The tension key can fall a couple of times but once the lock is properly tensioned, you will have to look for a lock similar to SPP and make a tubular lock. One limitation of this design is that you must configure many pins and make sure you do not have any false sets before you decide to eliminate the voltage and reset the pins.

In conclusion, a cruciform lock is a mixture of several locks. It can be said that it is a mixture between the standard pins and the tubular block. These can offer greater security, however, this will depend on the brand of the lock. Currently, there are locks that are safer and more reliable. However, there are still people who trust these old cruciform locks and have done very well with them. It will depend on each person who chooses the one that best suits the needs.

Leave a Comment

Your email address will not be published. Required fields are marked *