Measuring a cylinder lock – how to always choose the right size
We have for any door thickness proper M&C cylinder. However, it is important to measure your current cylinder correctly.
With below roadmap Prevents you from choosing the wrong size and ensures that your cylinder lock is safe and fits properly.
Step 1 – Remove the cylinder from the door
Open the door and loosen the mounting screw (on the side of the door).
Insert the key into the cylinder and turn it slightly until you can easily slide the cylinder out of the door.
Step 2 – Measure from the center of the screw hole
Meet now from the center of the screw hole:
- to within (side of the house)
- to Outside (side of the street)
A common size is 30 / 30 mm.
The total length of the cylinder is then 60 mm.
Step 3 – Take into account M&C sizes (+2 mm)
The cylinders of M&C are 2 mm longer than standard cylinders, due to the extra strong steel bridge.
Do you measure 30/30 mm?
Then you choose at M&C before and after, 32/32 mm (65 mm total).
This size almost always fits standard doors of 38–42 mm thick.
Step 4 – Check the outside of the door
In case of unequal sizes, such as 30 / 45 mm, it is important to check whether the cylinder protrudes on the outside.
- Insert the cylinder maximum 1–3 mm out? → choose 32 / 47 mm
- Does the cylinder protrude further from the fitting? → choose 32 / 42 mm
Note: on the outside a cylinder may never exceed 3 mm to stick out.
On the inside, further protruding is no problem.
Video: Removing and measuring a cylinder
In the video below, we show you step by step how to remove the cylinder from the door and measure it correctly:
Frequently asked questions about measuring cylinders
The most common size is 30 / 30 mm.
At M&C then do you always choose 32 / 32 mm.
Due to the extra strong hardened steel bridgeThis increases security against core pulling and breaking.
Maximum on the outside 3 mmIf the cylinder protrudes further, it becomes vulnerable to burglary.
No problem. We can your M&C Always convert the cylinder to a shorter or longer size.
Feel free to contact us or order directly. We're always happy to help you choose the right size.