Changeable Padlock Codes

The term “Changeable Padlock Codes” can mean a few different things. For this article I will define this as anything that changes the lock or key codes of the padlock. There are multiple ways that can accomplish this, let’s take a look at them.

  1. The removal of the lock cylinder and installation of a new one.
  2. Removing the current lock cylinder and rekeying it then re-installing it.
  3. Change the current lock code by turning a key as in the CobraMatic.
  4. Removing the lock cylinder as in the SFIC padlocks.
Cobra Universal PUCK Padlock

Let’s take a look at these one at a time. In example one CobraLock has two padlocks that are built to have their lock cylinders change very easily. The Cobra Universal Puck padlock uses standard vending locks that are easily changed. The Cobra Flex padlock uses the standard 7/8” cam lock that is easily changed. This is a very unique and patented process.

In the second example you would remove the lock cylinder then rekey it and cut new keys. To rekey a lock cylinder the combination pins are changed to the new lock code and the keys are cut to match. This method can be done many times. The lock cylinder can also be “keyed” to match another lock code that the user might be using. It should be noted that many padlocks cannot have their lock cylinder removed, therefore they are not rekeyable.

The third method must have a very special lock cylinder already installed. This lock cylinder is known under a number of trade names such as Cobramatic, ChangeMatic, and Gematic to name a few. These locks already have eight lock code changes built in. There is a special key the “Change Key” that allows the user to change the lock code to one of eight different codes. Once changed a new key must be used.

Cobra FLEX Padlock

The third method must have a very special lock cylinder already installed. This lock cylinder is known under a number of trade names such as Cobramatic, ChangeMatic, and Gematic to name a few. These locks already have eight lock code changes built in. There is a special key the “Change Key” that allows the user to change the lock code to one of eight different codes. Once changed a new key must be used.

The forth method is a padlock that comes with an SFIC (small format interchangeable core). These lock cylinders are very popular and heavily used in door hardware. Padlocks are also made to accommodate the SFIC cylinder. To remove the lock core you simply use a change key that is specially cut to remove the lock core. You use the same type of key to insert the new lock core. With this type of padlock it is possible to have a padlock or door unlock with the same key.

These are the most popular types of changeable padlock codes.

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