On doorknobs that have a lock it is employed by a small lever or push button on the interior handle.
Diagram door handle latch.
Expert advice on how to repair common problems with door knob locks and deadbolts such as stuck or frozen door locks latches that don t latch and keys broken off in door locks.
If a cylinder is sticking has a key broken off in it or is damaged then you may need to replace the cylinder entirely rather than simply re keying.
Interior door pull handle.
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Diagram showing the parts of a door lock including the knob rose cylinder latch assembly bolt and strike plate.
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The cross bore is the main hole drilled into the face of the door where the body of the lock chassis is installed.
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The door know while the smallest component of a door and frame set is the most intricate.
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Then remove the inside door handle.
As we were taking.
If you need a new lock because you lost the key to the door you may opt for re keying the cylinder rather than replacing it.
Remove the outside door handle.
This is the spring loaded piece that protrudes past the door keeping the door closed.
The lock prevents the spindle of the bolting mechanism from retracting from the door frame making it impossible to open the door.
As you remove the pieces make sure you keep them all together they are pretty small and can disappear quickly.
The latch bore also known as the edge bore is the hole drilled from the side of the door into the cross bore to allow the latch of the lock to be installed and to accommodate the sliding of the deadbolt.
Each door set is a little different.
Use your drill and unscrew the screws in the latch as well as the screws on the inside door handle.
Perhaps the most important of all door handle parts is the latch mechanism.
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Inner working of a simple door handle mechanism and how to reverse the latch.
Our door knob illustration above shows the many intricate parts that make up a door knob.
While most latch mechanisms use a retracting tubular latch mechanism that goes in when the handle is turned some doors like closets use a ball latch.
