What is BS EN 1303 – Cylinder Locks Explained is a Locks Online exclusive guide on the requirements for cylinders used on any locks in buildings.
In this article I will explain what cylinders this standard applies to, where you can use them and what classifications and tests you need to look out for. To make sure you get the best out of your door security, in this guide I have outlined the important factors of finding the right cylinder for your lock whether it is for your home or for your business!
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So what is the standard?
Simply, the standard has been put into place as an umbrella, of many different tests for a cylinder to use with a lock. This is to ensure a cylinder is fit for purpose and people can get the right products for their application. It would be no use to you to use a cylinder for a bathroom door as a form of security for your front door! You can tell which cylinders are good for your locks by something called a classification. I will explain the classification later in this article. I’m guessing at this point your wondering what cylinders fall under the BS EN 1303 Standard. To make it easy, I have put these in picture form!
These come in 3 different applications.
Single cylinder – External key operation, no internal operation
Double cylinder – External key operation, internal key operation
Thumbturn cylinder – External key operation, internal thumbturn operation.
Breaking down the classification.
All British Standard classifications work on a coding system which can be any number of digits. Each digit in the classification represents tests such as corrosion, fire resistance and safety. This means that the products you are looking to buy have been tested to the highest standards. This will help you to identify the right products when you are looking to buy a new cylinder, for the right application. The BS EN 1303 had an 8 digit coding system.
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Below is a breakdown of all the different digits in the classification.
Digit 1 – Category of Use – 1 Grade Identified.
Grade 1: Keys shall resist a torque of 2.5N, and still be usable.
Digit 2 – Durability – 3 Grades Identified.
Grade 4: 25,000 Test Cycles
Grade 5: 50,000 Test Cycles
Grade 6: 100,000 Test Cycles
Digit 3 – Test Door Mass – No Requirements
Digit 4 – Fire Resistance – 2 Grades Identified
Grade 0: Not suitable for fire/smoke resistant door assemblies
Grade 1: Suitable for fire/smoke resistant door assemblies subject to satisfactory assessment of the contribution of the cylinder to the fire resistance to the specified fire/smoke door assemblies.
Digit 6 – Corrosion and temperature resistance – 4 Grades Identified
Grade 0: No resistance
Grade A: 96 Hours NSS: No temperature resistance required
Grade B: No resistance requires – resistance to -20/+80 degrees temperature extremes.
Grade C: Resistance to -20/+80 degrees temperature extremes.
**No distinction is made between the inside and the outside of wither the cylinder and/or the door
** On completion of the test, the cylinder must operate using a maximum 1.5Nm torque on the key.
Digit 7 – Key related security – 6 grades Identified.
Digit 8 – Attack resistance – 3 Grades Identified
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Here is an example of a classification for a BS EN 1303 Cylinder.
As you can see, this cylinder in particular has the features of: Keys shall resist a torque of 2.5Nm and still be usable, can withstand 100,000 test cycles, has no door weight requirements, is not suitable for fire doors, has no safety requirements, has 96 hours corrosion but no temperature resistance required, has a grade 4 listed for security and has a grade 1 on the attack resistance chart. Something like this would be good to use in a front door for a house.
Many cylinders for home or commercial use will need to have some sort of testing done to ensure basic security for the application. It’s worth checking if our cylinder in your lock at home has a BS EN 1303 standard. If not, I would recommend changing to a high security cylinder to ensure maximum safety for your home/business and family. If you have any questions regarding high security cylinders please contact us for information. You can call the team on 01646 698218 or email us now on firstname.lastname@example.org. Our team are here to help with all security issues you need resolving.
For our full range of high security cylinders, follow the link: https://www.locksonline.co.uk/acatalog/LocksOnline-EPS-High-Security-Cylinders.html
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