How do you determine the size of hole saw needed for a door knob? It depends on the size of the door knob, as well as the thickness of the door. Generally, you will need a hole saw that is slightly larger than the diameter of the door knob.

For example, if your door knob has a 2″ diameter, you would need a 2-1/4″ hole saw. If your door is 1-3/8″ thick, you would need a 1/2″ hole saw.

If you’re looking to install a new door knob, you’ll need to make sure you have the right size hole saw. The hole saw size for a door knob is typically 2-1/8 inches. This will allow enough space for the new door knob and any hardware that goes with it.

Keep in mind that some door knobs are larger or require special hardware, so it’s always best to check with the manufacturer before making your purchase.

Standard Door Bore Hole Size

The standard door bore hole size is 2-1/8″. This is the industry standard for new construction and replacement doors. The size allows for a variety of different locksets to be installed, such as single cylinder, double cylinder, and deadbolt locks.

If you’re not sure what size bore hole to use, consult a professional locksmith or hardware store employee for assistance.

Hole Saw Size for Door Knob


Are All Door Knob Holes the Same Size?

No, not all door knob holes are the same size. The most common door knob hole sizes are 2-1/8 inches and 2-3/4 inches, but there are also smaller and larger sizes available. If you’re not sure what size door knob hole you need, it’s best to measure the existing hole or ask a hardware store employee for help.

What Size Hole Saw Do I Need for a Deadbolt?

A hole saw is a tool that is used to create large holes in materials such as wood, metal, or plastic. It consists of a circular cutting blade that is attached to a mandrel, which is then connected to a drill. The size of the hole saw will determine the size of the hole that it can cut.

When choosing a hole saw for a deadbolt, it is important to first measure the thickness of the door where the deadbolt will be installed. The thickness of the door will dictate the size of hole saw needed. For example, if the door is 1 inch thick, then you would need a 1-inch hole saw.

It’s also important to consider what material the door is made out of when selecting a hole saw. If the door is made out of wood, then you would need a different type of hole saw than if the door was made out of metal. There are many different types and sizes of hole saws available on the market, so it’s important to do your research before making a purchase.

What is the Standard Door Lock Hole Size?

The standard door lock hole size is 2-1/8″. This is the most common size for door locks and will fit most standard doorknobs. If you have a larger or smaller hole, you may need to special order a door knob to fit.

What is the Standard Door Knob Diameter?

Most door knobs have a standard diameter of 2-1/8 inches. However, some knob sets may have a slightly larger or smaller diameter. It is important to measure the diameter of your door knob before purchasing a new one to ensure that it will fit properly.



There are a few things to consider when choosing the right size hole saw for your door knob. The first is the diameter of the hole saw. You’ll want to make sure that the hole saw is slightly larger than the door knob so that it can fit snugly around it.

The second thing to consider is the depth of the cut. You’ll want to make sure that the hole saw can reach all the way through the door so that you can get a clean cut. Finally, you’ll want to consider the material of your door.

If you have a thick door, you may need a longer or wider drill bit so that you can get through it without damaging it.

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