Master the Art of Master Key Systems with Progression System

Master the Art of Master Key Systems with Progression System

Table of Contents

1. Introduction
2. Understanding the Importance of Master Key Systems
3. The Two Most Popular Ways to Set Up a Master Key System
4. Progression Systems: The Basics
   1. Rule Number 1: No Cut in the Master Key Is Used in Any Change Key in the Same Position
   2. Rule Number 2: Each Cut on a Change Key Must Be at Least Two Depths Different Than Any Other Cut on Another Change Key
   3. Rule Number 3: The Master Key Should Use the Even or Odd Even Key Bidding Pattern
   4. Rule Number 4: The Master Key Should Have at Least One Zero Depth or the Shallowest Depth Available
5. Developing a Progression Master Key System: Step-by-Step
   1. Determining the Master Key Bitting Code
   2. Progressing the System Out
   3. Writing the Codes
   4. Checking for Unusable Codes
   5. Cutting the Keys by Code
   6. Pinning the Cylinders
6. Understanding Sub Master Keys
7. Addressing Common Questions: Top Pins and Calculating Pin Sizes
8. Conclusion

Understanding the Importance of Master Key Systems

Master key systems play a crucial role in security and accessibility. Whether you're a locksmith or a property owner, understanding how to set up and manage a master key system can save you time, effort, and potential headaches. In this article, we will explore the basics of master key systems, specifically focusing on progression systems. By following the principles of progression systems, you will learn how to create a functional and efficient master key system that meets your specific needs.

The Two Most Popular Ways to Set Up a Master Key System

Before we delve into progression systems, it's essential to understand that there are various approaches to setting up a master key system. However, the two most popular methods are progression systems and the Holden-Berry system. In this article, we will focus on progression systems.

Progression Systems: The Basics

A progression system is a widely used method for setting up a master key system. It follows several rules to ensure the system functions smoothly and provides the necessary security. Let's explore the four key rules of progression systems:

Rule Number 1: No Cut in the Master Key Is Used in Any Change Key in the Same Position

The first rule in progression systems states that no cut in the master key should be used in any change key in the same position. This rule aims to prevent any conflicting cuts between the master key and the change keys. By adhering to this rule, you can avoid potential issues and maintain the integrity of the system.

Rule Number 2: Each Cut on a Change Key Must Be at Least Two Depths Different Than Any Other Cut on Another Change Key

To ensure proper functionality, it is crucial to maintain a minimum depth difference between the cuts of change keys. Rule number two dictates that each cut on a change key must be at least two depths different from any other cut on another change key. This rule helps prevent the inadvertent activation of multiple shear lines, ensuring seamless operation of the system.

Rule Number 3: The Master Key Should Use the Even or Odd Even Key Bidding Pattern

The bidding pattern for the master key is an essential aspect of progression systems. Rule number three suggests that the master key should use either the even or odd-even bidding pattern. This pattern alternates between even and odd depths, thereby preventing the creation of shear lines with identical depths, which could compromise security.

Rule Number 4: The Master Key Should Have at Least One Zero Depth or the Shallowest Depth Available

To ensure flexibility and versatility, the master key should contain at least one zero depth or the shallowest depth available for the particular key system. This rule ensures that the master key can access all relevant chambers in the system. By including a zero depth or shallowest depth cut, you ensure that the master key performs its intended function effectively.

By following these rules, you can set up a progression master key system that is secure, efficient, and easy to manage. Understanding these rules is essential for both locksmiths and property owners who rely on master key systems for their day-to-day operations.

Developing a Progression Master Key System: Step-by-Step

Now that we have a basic understanding of progression systems and their fundamental principles, let's dive into the step-by-step process of developing a progression master key system. By following these steps, you will be able to create a functional and custom-made system tailored to your unique requirements.

Step 1: Determining the Master Key Bitting Code

The first step in developing a progression master key system is determining the master key bitting code. This code serves as the foundation for the entire system. When selecting a master key bitting code, it is important to consider the following factors:

• Ensure that the code includes at least one shallow cut or zero depth.
• Follow the even or odd-even bidding pattern for the master key.
• Choose a code that is easy to remember and manage.

By keeping these considerations in mind, you can select a master key bitting code that meets your specific needs.

Step 2: Progressing the System Out

Once you have determined the master key bitting code, it's time to progress the system out. This step involves assigning depths to each available option in the system. Following the rules we discussed earlier, progress the system by assigning depths based on the even or odd-even bidding pattern and ensuring a minimum depth difference between cuts on change keys.

Step 3: Writing the Codes

After progressing the system out, it's important to write down the codes for each key. This step ensures that you have a comprehensive record of the system. By referring to these codes, you can easily cut keys and manage the system effectively.

Step 4: Checking for Unusable Codes

In any progression master key system, there may be some unusable codes that need to be identified and removed. Unusable codes refers to cuts that have a high difference, known as the max adjacent cut specification (MA CS). These cuts can cause problems during key cutting or result in keys getting stuck in the cylinder. By checking for and removing unusable codes, you can ensure the system functions properly.

Step 5: Cutting the Keys by Code

Once you have verified the codes and removed any unusable cuts, it's time to cut the keys according to the code. Using the master key bitting code and the progression you have developed, cut each key to the required specifications. This step ensures that each key fits the corresponding lock in the system.

Step 6: Pinning the Cylinders

The final step in developing a progression master key system is pinning the cylinders. Based on the progression and codes you have established, pin each cylinder to match the corresponding key cuts. This step ensures that each key operates smoothly and grants the necessary level of access.

By following these steps, you can successfully develop a progression master key system. Remember to consider your specific needs and consult with experts if you encounter any challenges along the way.

Understanding Sub Master Keys

In addition to the primary master key, a master key system can also include sub master keys. Sub master keys provide access to specific subsets of locks within the system. To create a sub master key, you only need to consider what you did or didn't progress on the master key and apply it to the change keys. By understanding this concept, you can easily create sub master keys that suit various access requirements.

Addressing Common Questions: Top Pins and Calculating Pin Sizes

As you work with master key systems, you may come across questions regarding top pins and calculating pin sizes. Commonly, there is confusion about whether the top pins need to be changed when master keying a cylinder. The answer is simple: if you use master pins in the system, you must calculate the appropriate top pin size to maintain proper functionality.

To calculate the top pin size, subtract the length of the master pin from the standard top pin size. This ensures that the total pin stack height remains consistent and the keys can operate smoothly. By following this calculation method, you can adjust the top pin sizes accordingly and create a well-functioning master key system.

Conclusion

Master key systems play a fundamental role in security and accessibility. By understanding the principles and techniques of progression systems, you can create efficient and customized master key systems. In this article, we covered the basics of progression systems, step-by-step development, sub master keys, and common questions regarding top pins and pin sizes. With this knowledge, you can confidently implement and manage master key systems that meet your specific needs.

Highlights

• Master key systems are essential for security and accessibility.
• Progression systems are a popular method for setting up master key systems.
• Progression systems follow key rules, including depth differences and bidding patterns.
• Developing a progression master key system involves determining the master key code, progressing the system, writing the codes, checking for unusable codes, cutting keys, and pinning the cylinders.
• Sub master keys can be created based on the progression of the master key.
• Calculating top pin sizes is necessary for proper functionality in master key systems.

FAQ

Q: How many different kinds of master key systems are there? A: While there are various approaches to master key systems, the two most popular methods are progression systems and the Holden-Berry system.

Q: Why are there so many master pins in a master key system? A: The number of master pins in a master key system depends on the chosen progression method. While it may seem excessive, having multiple master pins enables the system to function smoothly and provides the necessary flexibility.

Q: Do I need to change the top pins when master keying a cylinder? A: Yes, it is recommended to change the top pins when master keying a cylinder. By calculating and adjusting the top pin size based on the master pin length, you ensure the proper functioning of the key stack.

Q: How can I create sub master keys in a master key system? A: To create a sub master key, you need to identify what cuts were or were not progressed on the master key and apply that progression to the corresponding change keys. This allows you to create sub master keys tailored to specific subsets of locks within the system.