Understanding Cylinder Locks: Your Curated Guide

Posted on: 20.12.2023

Categories: DCD News

Barrel locks, commonly referred to as cylinder barrels or just cylinders, are a staple in modern door security systems. This type of lock is widely used across the UK due to its reliability and ease of installation and replacement.

In this blog, we will delve into the various aspects of cylinder locks, drawing on insights from our Tool Box Talks video series and blogs to provide you with an understanding of these familiar locks.

Different Cylinder Profiles

Key Points:

Variety of Profiles: Cylinders come in different profiles, each suitable for specific door types and security needs. Install a cylinder barrel with a mortice cylinder lock or rim lock case.
Popular Types: The most common types include the euro profile, UK oval profile, and rim cylinder. Less common types are mortice threaded, Scandinavian oval, Swiss round, removable core, and snowman (no, we’re not even joking).
Tool Box Talk Source: For an introduction to the main cylinder profiles, refer to our video below: "What are the different cylinder profiles". You’ll also find the details in our product catalogue.

Measuring for the Perfect Fit

Key Points:

Importance of Accurate Measurement: Correct sizing is crucial for optimal security and functionality. If too much of a cylinder barrel protrudes from the door, it is more prone to attack or vandalism. If a cylinder is too short the key or thumbturn won’t turn properly to lock or unlock the door.
Measurement Guide: Key dimensions include the length from each end to the central screw hole, plus the overall length. Some cylinder lock barrels have different security ratings for the internal and external sides, so make note of that too.
Tool Box Talk Assistance: Check out our video below on "The measurements required to order the correct cylinder" for a step-by-step guide.

Removal and Replacement

Key Points:

DIY and Site Friendly: Removing a cylinder lock is a straightforward process that anyone can undertake with basic instructions. Intricacies occur with different lockcases but the basic principles remain the same.
Tools Needed: Basic tools like a screwdriver are usually sufficient. You’ll need a key to operate a single or double cylinder, as the cam needs to be aligned with the body to remove the barrel from the door.
Tool Box Talk Instruction: Our video below on "How to remove a cylinder" provides practical tips for easy removal. You’ll see a DIN standard mortice sashlock in this example, used in conjunction with a euro cylinder thumbturn lock.

Security Aspects of Cylinder Locks

Blog Highlights:

Are Cylinder Locks Secure? Our blog on 3 star euro cylinders delves into the security ratings and why choosing a higher-rated cylinder lock is beneficial in some situations. Want to know the difference between 1 star and 3 star cylinders? Then click through to find out.
Key Security: Understanding controlled access and physical security are fundamental, as discussed in "The importance of key security". We cover the types of key security and different key security services available via our specification team and locksmith.
Master Key Systems: A Q&A with Jordan, our MLA master locksmith, "Do you have control of your security keys?" sheds light on master key systems and security keys. It’s a great introduction to bench locksmithing and master key security.

Common Questions & Quick Answers

What Makes a Cylinder Lock Secure? Different brands and ranges of cylinder locks have a variety of security features. This includes anti-pick, anti-drill, and anti-bump properties. Security escutcheons and covers are available for additional protection.
Can Cylinder Locks be Re-Keyed? Some cylinders allow re-keying but most however cannot be rekeyed, or it is not cost-effective to do so. Your best bet is installing a new, replacement lock barrel.
How Often Should Cylinder Locks be Replaced? Regular maintenance is advisable to ensure locks function correctly. There is no set time frame for changing a lock barrel. Cylinder locks are only really replaced for the following reasons:

Faulty or damaged
Change in access required
Lost or stolen key so a security risk
Changing the profile of the lockcase
Whole master key system being changed
A change in residency or occupancy - who else has a key?
An update in security requirements, legislation, or standards

Types of Euro Cylinder Locks: As with UK oval cylinders, euro profile cylinder barrels are available in the following variants: Single, double, thumbturn, and half turn only. The two most common internal mechanisms are pin tumblers and disc tumblers.
How Do Euro Cylinder Locks Work? Cylinder barrels themselves do not lock a door. They must be used in conjunction with a separate lockcase or locking mechanism. As with a 5 lever lock, the correct key must be inserted into a cylinder to rotate the cam. When the key or thumbturn is turned within the cylinder, the cam rotates and moves the bolt housed within the lockcase. It then shoots into the frame-mounted keep, securing the door.

When the key or thumbturn is turned the other way, the deadbolt retracts back into the lockcase, allowing the door to be opened. Any latch bolt fitted would be operated by separate door handles or door knobs. However, in recent years, many lockcase models now allow for the latch bolt to be retracted on the second turn of the cylinder key.

Key Insights: The Final Word on Cylinder Security

Understanding the nuances of any cylinder locks, from their different profiles to their security features, is key to ensuring the safety and security of your premises. By combining practical advice from our Tool Box Talks with insights from our specialized blogs, we aim to provide a comprehensive resource for all your cylinder lock queries.

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You can contact us today with any ironmongery, lock, or security key queries. The team is on hand to find the right security solution tailored to your facility.