How to measure a mortice lock?

In order to measure a mortice lock four key dimensions. Firstly, measure the backset, which signifies the distance from the door’s edge to the center of the keyhole or spindle hole when the door is locked. Secondly, measure the case depth, which is the length of the lock body that inserts into the door.

Third, assess the end plate, noting the width and height of the rectangular plate visible on the door’s edge. Lastly, if you are replacing doorknobs or handles along with the lock, measure the spindle’s length, excluding any connecting screws or components. Accurate measurements of these dimensions are crucial when selecting a replacement mortice lock to ensure it fits your door correctly.

Material needed:

• A measuring tape
• A pen or pencil
• A paper

A step-by-step guide to measuring a mortice lock:

• Measure the backset: Measure the backset, distance from the center of the keyhole to the edge of the door. Most backsets are commonly measured at either 44mm and 56mm.Typically a lock adjacent to a glass panel will be 2½” and otherwise 3”, but you should always measure to be sure.

• Measure the case depth: This is the depth of the lock body, measured from  faceplate to the back of the lock. Most case depths are either 64mm or 76mm.

• Measure the for end length: This is the length of the faceplate, measured from one end to the other.

• Measure the for end width: This is the width of the faceplate, measured at its widest point.

• Measure the spindle length: This is the length of the spindle, measured from the end that goes into the handle to the end that goes into the lock.

• Record Measurement: Once you have taken all of these measurements, you can write them down on a piece of paper. You can then use this information to choose the correct mortice lock for your needs.

Here are some additional details on how to measure a mortice lock:

• Backset: The backset is the distance from the center of the keyhole to the edge of the door. It is important to measure backset accurately because it determines the type of lock you need to purchase. The most common backsets are 44mm and 56mm.
• Case depth: The case depth is the depth of the lock body, measured from the faceplate to the back of the lock. It is important to measure case depth exactly because it determines the thickness of the door that the lock can be used on. The most common case depths are 64mm and 76mm.
• For end: The forend is the faceplate of the mortice lock. It is important to measure the length and width of the for end accurately because it determines the size of the lock that you need to purchase.
• Spindle: The spindle is the metal rod that connects the handle to the lock body. It is important to measure the length of the spindle accurately because it determines the thickness of the door that the lock can be used on.

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Additional tips

• If you are unsure about any of the measurements, it is always best to consult with a professional locksmith or a hardware expert.
• When choosing a replacement lock, it is important to consider the type of lock (sash lock or deadlock), as well as any security features that you require.
• If you are replacing a lock in a fire door, you must ensure that the new lock is fire rated.
• I hope this additional information is helpful. Please let me know if you have any other questions.

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FAQs about how to measure mortice lock

What is a mortice lock?

A mortice lock is a type of lock that is installed in a recess in the door. Mortice locks are typically more secure than other types of locks, such as rim locks and surface locks.

Why is it important to measure a mortice lock correctly?

It is important to measure a mortice lock correctly to ensure that the lock fits properly in the door and to choose the right lock for your needs.

What are the most important measurements to take when measuring a mortice lock?

The most important measurements to take when measuring a mortice lock are the backset and the case depth.
Backset: The backset is the distance from the center of the keyhole to the edge of the door.
Case depth: The case depth is the depth of the lock body, measured from the faceplate to the back of the lock.

What other measurements may I need to take when measuring a mortice lock?

Other measurements that you may need to take when measuring a mortice lock include the for end length, for end width, and spindle length.

• For end length: The end length is the length of the faceplate, measured from one end to the other.
• For end width: The for end width is the width of the faceplate, measured at its widest point.
• Spindle length: The spindle length is the length of the spindle, measured from the end that goes into the handle to the end that goes into the lock.

What are the different types of mortice locks?

There are two main types of mortice locks: sash locks and deadlocks.

• Sash locks: Sash locks have a latch that can be retracted by the doorknob or handle.
• Deadlocks: Deadlocks do not have a latch and can only be opened with a key.

What are the different backsets to measure a mortice lock?

The most common backsets for mortice locks are 44mm (2½”) and 56mm (3”). However, there are other backsets available, such as 64mm (2½”) and 82mm (3¼”).

What are the different case depths to measure a mortice lock?

The most common case depths for mortice locks are 64mm and 76mm. However, there are other case depths available, such as 82mm and 92mm.

How do I measure a mortice lock backset?

To measure the backset of a mortice lock, close the door and place a measuring tape against the edge of the door. Measure from the edge of the door to the center of the keyhole.

How do I measure a mortice lock case depth?

To measure the case depth of a mortice lock, open the door and remove the lock from the door. Measure the depth of the lock body from the faceplate to the back of the lock.

What should I do if I am unsure about any of the measurements?

If you are unsure about any of the measurements then learn how to measure things, you can always consult with a professional locksmith.