If you are looking at improving your home security and thinking of upgrading your door locks to something more secure, we have an easy guide on how to remove and measure your lock.
Rockdoor Lock
This Rockdoor lock comes with three keys in purple. You can also purchase extra Rockdoor keys if you need more. This is sourced directly from Rockdoor, ensuring perfect compatibility and reliability.
Keyed Alike only comes Key / Key. Thumb turn is currently not available.
Steps To Measure A Lock
Measuring a door cylinder lock is essential for ensuring a proper fit when replacing your lock. Here’s how to do it accurately:
Tools Needed
To remove the existing lock
Repeat the process backwards to reinstall the lock, ensure the ‘EXT’ marked side faces towards the outside
To measure the cylinder length
Example Measurement
If your measurements are 45mm (internal) and 55mm (external), your cylinder length is 100mm. Ensure you get a replacement cylinder with these same dimensions. If your lock protrudes on the internal or external side, you could reduce these accordingly. Ideally you want them flush or 5mm proud of the handle.
In the example photo above, the overall length of the lock (red line) is 80mm, and you measure from each end of the lock to the center of the hole (yellow lines). In this case, the cylinder lock is a 80mm equal split as it is 40mm / 40mm.
The ‘EXT’ written on the lock tells you that this is the external side that faces to the outside of the door.
Choosing the Best Lock for Your Door
Once you have measured your door cylinder lock, the next step is to choose the best lock for your needs. For a detailed comparison of top-rated locks, read out blog post on Avocet ABS, Ultion Plus, and Yale Platinum locks. This post covers certifications, designs, features, and size ranges to help you make an informed decision on enhancing your home security.
Frequently Asked Questions
Measure the overall length of the lock, and then measure from the centre screw hole to each end of the lock.
You need a screwdriver and the new lock cylinder.
Yes, with basic tools and instructions, you can swap a lock yourself.
Unfortunately, we only specialise in composite doors and bifolds.
Installation times vary depending on what is involved, but typically it’s around 5 hours from start to finish.
Unscrew the fixing screw at the side of your door and turn the key slightly to pull out the cylinder.
Accurate measurement ensures the new lock fits perfectly and offers the best security.
No you do not need to lubricate your new door cylinder lock. If you do, not not use WD40 or anything similar, only graphite powder
A euro cylinder lock is a common type of lock used in many doors for security.
Yes, you can have multiple locks keyed alike for convenience.
High-security locks like Ultion or Avocet are ideal for front doors. See our blog post on Ultion vs Avocet vs Yale
A thumbturn is like a permanent key in your door for ease of use.
Measure the existing lock and match those measurements to the new lock.
Try and lubricate the lock using graphite powder
A door cylinder lock will cost around £50 to buy.
It typically takes about 15-30 minutes to swap a lock.
