How are Mortice latches measured?
How are Mortice latches measured?
On most interior door handles you will find a tubular mortice latch. These sizes are the overall length of the latch, or the case. When measured to the spindle mechanism, the backset, then they translate as 44mm for the 65mm case and 57mm for the 76mm case.
Are all Mortice locks the same size?
A – The Case Depth The case depth is what would commonly be referred to as the ‘lock size’. Whilst not all locks follow the same template, nine times out of ten, other measurements can be correctly assumed based on the case depth. There are many different case depths but the most common sizes are 64mm and 76mm.
Do door latches come in different sizes?
In the United States, there are two common backsets for residential door locks: 2 3/8 inches and 2 3/4 inches. Pack your locks with a 2-3/8-inch or 2-3/4-inch latch, depending on which backset you specify.
How do I choose a mortice lock?
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. These measurements are approximate.
How do I know what size latch I need?
Overall Latch Size = Backset An easy way to choose which latch you need is to measure from the edge of your door to the centre of your door Stile. Choose the Backset which is closest to this measurement, and the handle will be as central as possible to the Stile on your door.
What is backset size on a mortice lock?
Almost ALL domestic mortice locks and tubular latches are supplied with either a 44mm or 57mm backset length. These equate to case sizes of 2.1/2″ or 3″ in imperial measurements. Commercial (DIN) lockcases are 60mm backset.
Are door knobs standard size?
The standard size for a door knob diameter is either 2 3/8 inches or 2 3/4 inches and these knobs will usually fit doors that are anywhere between 1 3/8 inches to 1 3/4 inches thick.
How long does it take to install a mortice lock?
Resolution: Typical installation by an experienced Schlage L lock installer on a door correctly prepped for the Schlage L-Series function could take 10 to 20 minutes. Many outside variables can change the amount of time needed.
What’s the difference between a mortice lock and a sash lock?
Mortice locks are embedded into the door itself and can only be opened with the key. They are commonly found on back doors and are often fitted to front doors in addition to a cylinder rim lock (Yale lock). A sash lock has a bolt and a latch and a pair of handles.
What size mortice lock do I need for my door?
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. These measurements are approximate. A Mortice Sashlock is more likely to be used on back doors and internal doors.
What is the normal height for fitting a mortice latch?
The normal height for fitting a mortice latch is a metre up from the floor (around 3 feet), but you can either match existing handle heights, ask the client how high they want them or check the drawing/schedule to find out which height to drill the handles.
Can I install a knob and mortise latch on a door?
Four panel doors and period doors often have a knob and mortise latch fitted to the centre of the lock rail. This can weaken some doors though so check with the manufacturer before drilling if you are looking to install the latch there.
How do you measure the forend length of a mortice lock?
The forend length of a mortice lock is measured by measuring from the top right corner of the forend to the bottom right corner of the forend. Please see the demonstration below on how to do this: 5. Forend Width Click here to view our full range of Mortice Locks including 2, 3, 4 and 5 lever mortice locks, tubular latches and mortice latches.
