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How do I select a half cylinder?

Do you have a half door cylinder necessary? This often occurs with a sliding door, garage door or a door with a blank plate is placed.
In that case, you choose a product in our webshop half cylinder.


Which size half cylinder should I choose?

You can recognize a half cylinder by its size 10 / xx.
De 10 mm represents the half side (without keyhole).
The measure that is in place of xx depends on the thickness of the door.

Most chosen size:
A common size is 10 / 32.
The total length of this half cylinder is 42 mm.
The distance from the heart of the screw hole until the key side is then 32 mm.

How do I measure the correct size?

Measure from the heart of the screw hole up to the side where the key goes.
This size determines the second number of the half cylinder (for example 10 / 32).

The side with 10 mm has no keyhole and is located on the side of the blank plate.

Half cylinder with knob

Do you want a button on the half cylinder?
Then you can use this option select directly when ordering.

In the webshop you will see a choice for inside en outside.
This is indicated because a half cylinder is usually applied on the inside.

Important to know:
Do you need a half cylinder that fits exactly? outside sit?
Then you can the same half cylinder Selecting.
There is no difference in the cylinder itself.

Are you unsure about the right size?

Don't worry. If you do order the wrong size, we can replace the half cylinder.
always convert to another size.

Not sure? Feel free to contact us – we're happy to help you choose the right half cylinder.

Frequently asked questions about half cylinders

What is a half cylinder?
A half cylinder has a keyhole on one side and no opening on the other. This type of cylinder is often used for sliding doors, garage doors, or doors with a blanking plate.
What does size 10/32 mean for a half cylinder?
The 10 mm represents the half side without a keyhole. The 32 mm is the distance from the center of the screw hole to the key side of the cylinder.
Is there a difference between a half cylinder for the inside or outside?
No. The cylinder itself is identical. The choice of inside or outside is only intended to indicate the most common application.
Can I order a half cylinder with a knob?
Yes. You can easily add a button to the half cylinder when ordering. You can select this option directly in the webshop.

Frequently asked questions about half cylinders

What is a half cylinder?
A half cylinder has a keyhole on one side and no opening on the other. This type of cylinder is often used for sliding doors, garage doors, or doors with a blanking plate.
What does size 10/32 mean for a half cylinder?
The 10 mm represents the half side without a keyhole. The 32 mm is the distance from the center of the screw hole to the key side of the cylinder.
Is there a difference between a half cylinder for the inside or outside?
No. The cylinder itself is identical. The choice of inside or outside is only intended to indicate the most common application.
Can I order a half cylinder with a knob?
Yes. You can easily add a button to the half cylinder when ordering. You can select this option directly in the webshop.