How to Install or Replace a Door Knob

A door knob is a rotating piece of metal on the outside surface of an exterior house or building. A latch mechanism and handle can be used to secure the interior side from opening, while two or more doors may use different mechanisms. These parts are usually made of brass, bronze, steel or stainless steel with either black paint that fades over time into silver gray patina

The “how to change a door knob” is a simple do-it-yourself project. It can be done in less than an hour, and it’s not difficult at all.

Door knob in packing.

A door knob in its box at a hardware shop might seem to be a perplexing contrivance. What kind of magic is at work within the door to make the knob spin so smoothly? It turns out that once you get into it, it’s not at that perplexing. You can install or replace practically any doorknob in your house with only a screwdriver. It’s useful when hardware has been scuffed or damaged (it’s a simple improvement that makes the house seem much better than the work put into it), but it can also instantly correct any latching issues a door may have. When hardware becomes bent or misaligned, a new knob and plates may readily correct the problem. 


Tools required to fix a door knob.

  • 1 door knob kit — consists of two door knobs (one with three “spindles” and the other without), a latching device, and a striking plate (where the door latches on the frame) 
  • Screwdriver 

How to Put a Door Knob on a Door

1. Place the Latch Unit in place and secure it.  

Insert and secure the latch unit. 

Door knob cutouts come in a variety of sizes. As a result, the round hole and distance from the door’s edge, as well as the cutout for inserting the actual latching device, are always the same. 

Screw the latch unit into place, ensuring that the angled portion of the bolt is facing the door frame — that is, in the direction the door is closing. 

Front view of door knob's hole with latch unit in it.

That half-moon-shaped aperture in the centre should be centered in the circular cut out.

2. Insert the “Outside” Knob from the other side. 

Inserting the "Outside" Knob from the opposite side.

For labeling reasons, the knob with the spindles on it is referred to as the “outside” or “external” knob even on inner doors. Thread the half moon-shaped spindle, as well as the two circular spindles into which the screws from the “interior” knob will go, through the matching hole in the latch unit from the other side of the door. There’s nothing to hold the knob in place yet, so keep your hand on it or have someone else do it for you. 

3. Secure the “Interior” Knob using a screwdriver. 

Inserted door knob with latch unit displayed.

The screw holes on the second knob should line up with the spindles on the one you just installed (which you can see in the image above). To join the two sides, use the screws included in the kit. The knob should now revolve freely and the bolt should be engaged. 

4. Install the new strike plate and make sure the latch is smooth. 

Attached new strike plate displayed.

That’s all there is to it. If you’re changing the knob and strike plate, you should also repair the hinges so that everything matches. That way, it seems to be more appealing. 

Black color door knob.


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Watch This Video-

The “how to assemble door knob parts” is a short guide that will show you how to install or replace a door knob.

Frequently Asked Questions

How do you replace door knobs?

A: There are a few ways you can change the look of your door knobs. You could paint them, stick stickers on, or add new modelers.

Are door knobs easy to install?

A: It depends on the type of door knob you are installing. Some wooden door knobs have screw holes that can easily be drilled into the wood, while others require sawing off a piece and then reattaching it with screws.

Can you replace a door knob without replacing the lock?

A: A lock and a door knob are two different things. If you want to replace the entire lock, thats an entirely different process than replacing only the doorknob.

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