It's important to remember that 5 lever mortice deadlocks won't be found on uPVC, aluminium or composite doors. It locks and unlocks from the inside and outside with a key. The words '5 Lever' should be engraved on the internal faceplate of the lock.
There are two sizes of mortice locks: 21/2” and 3”.
Because this is a 5 lever lock, there are obviously five of them. That means trying to pick one of these (if the burglar is willing to spend the time trying to get past the anti-pick curtain), is really difficult. There is a technique, but it requires holding just the right pressure as you do each lever in turn.
So, the five lever mortice deadlock is, as mentioned, commonly fitted to wooden doors, and it is possible to lock and unlock it from either side by inserting and turning the right key. As the key turns, the five levers contain within move into the locked/unlocked positions, thereby locking and unlocking the door.
Here are the most common ones: Tubular Mortice Latches – these are by far the most common. They have a sprung nib which is operated by turning a door knob or handle. They come in 'Standard' or 'Heavy' sprung versions.
What is the difference between mortice deadlock and sash lock? The difference between a mortice deadlock and sash lock is that a mortice sashlock has a latch and bolt to open and close the lock. Where-as a mortice deadlock does not have a latch to open the lock.
Yale Locks PM562PB25 Hi-Security BS 5 Lever Mortice Dead Lock 67mm 2.5-inch - Polished Brass Finish : Amazon.co.uk: DIY & Tools.
If the lock is still in the door it is possible to measure from the front plate of the lock to the centre of the keyhole. If the measurement is 45mm, you need a 64mm (2.5") mortice lock. If the measurement is 57mm, you need a 76mm (3") mortice lock.
It's a difficult game, and most pro locksmiths will drill a curtain mortice lock (drilling can be done in such a way the lock can be reused) but as far as picking goes, it's an incredible skill that will give you an incredible buzz.
Are mortise door locks universal? Yes, a mortise lock set and mortise door lock is universal and can easily be used to replace most other lock sets, especially on an older door.
5 Lever BS Deadlock in 64mm and 76mm options.. British Standard BS3621 Rated Dead Lock used as a matter of course ...
This lock is a 5 lever rated external lock that is used as an Insurance rated lock on an external door to a property. It comes in a two sizes, a body length (depth) of either 65mm (2.5″) or 75mm (3″) and in two finishes: Satin Stainless Steel and Evershine Brass Plate on Steel.
Mortice locks are generally available as either a deadlock or sashlock. A deadlock is operated by a key only and is sometimes used alongside a Nighlatch to provide additional locking in the centre of the door. You don't need to use a handle with a deadlock, turning the key or thumbturn retracts the centre deadbolt.
Mortise Locks
There are many different types of mortice cylinder locks, including three lever mortice locks and five lever mortice locks. The number of levers in a mortise lock tells how many points the door locks into the frame. The more levers it has, the more secure it will be.
These earned their name thanks to the pocket (or mortice) that the bolt slots into, which is cut into the internal face of the doorframe.
Mortice lock are commonly found in internal doors within the home. Mortice locks have several lever variations: a 2, 3, 5, or 7 lever mechanism.
Mortise locks are installed into a rectangular pocket cut out of the edge of a door. The term mortise refers to a hole or recess cut that allows the lock to be inserted. Mortise lock bodies look much different than cylindrical locks and allow for more working mechanics inside.
The standard Kwikset deadbolt is the most common lock in America.
You can check this by looking on the faceplate of the lock, the number of levers should be stamped there. For optimum security the 5 lever mortice lock should be Kitemarked and conform to BS3621. If it is, these details should be stamped on the lock faceplate.
5 lever locks use 5 levers. These levers are moved into position when the key is entered and turned in the lock. Once shut, you can't open the lock again from the outside without the key. 5 Lever locks are specified by insurance companies and are usually fitted on external entrance doors.