Why choose a knob cylinder?
A knob cylinder has a fixed turning knob on the inside. This allows you to open the door without a key. This is convenient when you want to leave quickly, when children or family members do not have the key with them, or when you do not want to leave a key in the lock on the inside.
Convenience on the inside
Open the door quickly without searching for a key.
Safely outside
Handy at front doors, back doors, and escape routes.
SKG 3 security
Strong protection against core pulling and forcing.
What types of knob cylinders are there?
The right knob shape depends primarily on ease of use, appearance, and the location of the door. For frequently used doors, grip is important. For visible doors, the finish can be the deciding factor.
Round button
A practical all-round choice for daily use.
Oval button
Compact, neat, and pleasant when the knob is close to the frame.
Tulip bud
More grip, especially useful for doors that open and close frequently.
Black knob cylinder
Modern finish for black hardware or a sleek door frame.
Buying a knob cylinder: what to look for?
1. Measure the cylinder size
Measure from the center of the screw hole inwards and outwards. If in doubt, use our measuring manual.
2. Choose the button shape
Round is universal, oval is compact, and a tulip knob provides extra grip.
3. Check security
For exterior doors, we recommend SKG 3 with core pull protection and certificate.
Frequently asked questions about knob cylinders
These answers help you find the right one faster. M&C to choose a knob cylinder for your front door, back door, or other exterior door.
What is a knob cylinder?
A knob cylinder is a cylinder lock with a turning knob on the inside. On the outside, you simply use a key. This allows you to quickly open the door from the inside without a key.
Is a knob cylinder safe?
Yes, provided you choose an SKG 3 knob cylinder with core pull protection. The knob is located on the inside; therefore, the security on the outside remains the determining factor.
When should I choose a knob cylinder?
Choose a knob cylinder when you want to easily open a door from the inside, for example for a front door, back door, shed door, or escape route.
What size knob cylinder do I need?
Measure from the center of the screw hole to the inside and outside of the door. The knob side is usually the inside. Carefully check that the cylinder does not protrude too far.
Can a knob cylinder be keyed alike?
Yes, knob cylinders can be supplied keyed alike. You then open multiple doors with the same key, while the knob remains on the inside.
Which tasks and skills are truly crucial to success in this role and which baggage you can eliminate. M&C Which knob cylinder fits best?
For a strong foundation is M&C Suitable for Minos. If you want extra key control or a higher finish, choose M&C Matrix, Condor or Move.
Also important for a knob cylinder
These pages help you choose the right version, size, and security before ordering a knob cylinder.
Which knob cylinder should I choose?
For everyday convenience
Choose a knob cylinder if you want to open the door from the inside without a key. | For exterior doors
Always choose SKG 3 with core pull protection for the front and back doors. | For multiple doors
Combine knob cylinders and standard cylinders keyed alike. |
Cylinder lock with knob: what is it and when do you choose it?
Create a cylinder lock with knob — also known as a knob cylinder or cylinder with a rotary knob — has a rotary knob on the inside instead of a keyhole. You open and close the door from the inside with a simple turn of the knob, without a key. This is ideal for the front door, back door, or an escape route, where you want to be able to get outside quickly.
Create a cylinder lock with rotary knob van M&C It fully retains SKG★★★ security with core pull protection: so you do not compromise on safety for extra convenience. You choose the size, color, and whether the knob is on the left or right yourself, and you can also choose a cylinder lock with a knob. keyed alike have made with the rest of your cylinders.
Rotary knob or push button? The versions listed
A knob cylinder — also known as cylinder lock with rotary knob mentioned — is available in two main versions. With the classic rotary knob You turn the knob to lock or unlock the door; this works intuitively and is suitable for virtually any interior or exterior door. If you choose a push button, then you press the button first before turning — an extra step that prevents the door from being opened accidentally, for example if there is a letterbox or cat flap in the door.
Every M&C- You can fully customize the knob cylinder. You determine the dimensions for the outside and inside, choose the knob shape, and select the finish: nickel, brass of blackThis way, the cylinder matches your door hardware perfectly, not only technically but also in terms of appearance.
For which doors is a knob cylinder suitable?
A knob cylinder is ideal for doors where you regularly want to go from the inside out without having to search for the key every time: the front door, back door, garden or shed door and internal connecting doors. Families with children, the elderly, and people who need to get outside quickly particularly benefit from this — in an emergency, you are outside with just one turn.
Pay attention to escape routes and fire safety: on a door serving as an escape route, you always want to be able to exit from the inside without a key — that is precisely where the rotary knob is the safe choice. Are you unsure which version suits your situation? Our M&C-specialists advise you without obligation.
This is how you correctly measure a knob cylinder
You measure a knob cylinder just like a standard cylinder, but you measure the inside. to the middle of the set screw — the knob itself is not included in the measurement. Measure from the center of the adjustment screw to the outside of the door (outer measurement) and to the inside (inner measurement). Round up to the nearest whole or half centimeter according to our size chart.
Not sure about the size? Then check out our explanation about the measure cylinder lock, or contact us. An incorrectly measured cylinder protrudes too far (vulnerable to burglary) or does not fit — we will help you find the right size.
Maximum security: SKG★★★ with core pull protection
Every knob cylinder from MC-Cilinder is a genuine one. M&C-security cylinder with SKG★★★ certification — the highest burglary resistance class, recognized by insurers and part of the Police Security Mark for Safe Living. The cylinder is equipped with core pull protection, a hardened steel bridge against cylinder breakage and an anti-drilling plate, plus protection against bumping and picking.
In addition, are M&C-cylinders copy-protectedYou can only order additional keys using your certificate of ownership or security card. This way, you maintain control over who can have a key to your home duplicated.
Multiple knob cylinders? Order keyed alike.
Do you have multiple doors with a knob cylinder? Then order them from us. keyed alike: all cylinders then work with one and the same key. You never have to search for the right key again and carry only one key with you. If you prefer a hierarchy — for example, a master key that opens everything and separate keys per door — then take a look at our identical cylinders and closing plans.
Frequently asked questions about knob cylinders
Can I replace a standard cylinder with a knob cylinder?
Yes. As long as you use the correct size, you can easily replace an existing cylinder with a knob cylinder — the installation is identical. Measure the outside and inside and configure your custom knob cylinder.
Which side is the button on?
The rotary knob is always on the inside of the door. You open it from the outside with the key. This way, you can never enter from the outside without a key, while you can exit from the inside without a key.
Is a knob cylinder as secure as a standard cylinder?
Certainly. Our knob cylinders are the same SKG★★★-approved M&C-cylinders with core pull protection. The rotary knob does not alter the burglary resistance on the outside.
Can I order extra keys later?
Yes, based on your title deed or security card. The keys are milled to fit your cylinder(s) exactly — also keyed alike within your existing plan.
Our M&C-custom cylinder locks
Choose you M&C-series — all SKG★★★-approved, custom-milled, available keyed alike, and shipped for free. Ordered before 23:59, delivered tomorrow.
