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With PC55 door hardware, the center-to-center distance is paramount. Always measure from the center of the handle hole to the center of the rounded top of the profile cylinder. Or use our Measuring Guide for optimal convenience during measurement. I also always recommend choosing door hardware with a spring system. This prevents your door handles from sticking over time and significantly reduces the strain on your mortise lock mechanism.
Frequently asked questions about PC55 door fitting
What exactly does the PC55 size mean for door hardware?
We also call this the center-to-center distance. The PC55 size represents a distance of exactly 55 mm between the center of the handle hole (the door handle) and the center of the profile cylinder. This is the absolute standard size for most residential doors in the Netherlands.
Can I install PC55 door hardware on any door?
No, PC55 door hardware on a backplate is specifically designed for doors with a mortise lock with a center distance of 55 mm. Always check the size of your current lock before ordering; this will prevent unnecessary drilling or uneven installation.
Are PC55 door hardware suitable for both left- and right-handed doors?
Yes, all our PC55 door hardware is universally applicable. Because the sets are supplied complete for both sides of the door, the direction of rotation doesn't matter. Our mortise locks also have a reversible latch, so they always fit.
Do I need a specific type of cylinder lock for PC55 hardware?
You can use any standard Europrofile cylinder. Pay close attention to the length: we often recommend using the door thickness plus approximately 10 mm extra on each side (depending on the thickness of the backplate) to ensure a snug fit.
What's the difference between PC55 and PC72 hardware?
The difference lies purely in the physical distance between the handle and the cylinder. While PC55 is the standard for almost all Dutch interior doors, the larger PC72 size is more commonly found on heavier doors in commercial buildings or on modern front doors.
