Are there different sizes of mortise locks?
There are two sizes of mortice locks: 21/2” and 3”. If you are installing a mortice lock to a door with a narrow frame, or any door for that matter, it’s very important to know what size lock you need. The size of the mortice lock refers to how far the keyhole will be from the edge of the door.
How do you measure for a replacement 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.
Are all sash locks the same 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.
How do you measure a lock size?
Measure from the outside edge of the door (including furniture) to the centre of your door. This is dimension A and is called the External Size to Centre. Next, measure from the inside edge of your door (including furniture) to the centre of your door to find dimension B, the Internal Size to Centre.
How do you measure a tubular Mortice lock?
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.
How do you measure sash locks?
To correctly measure a sashlock, you will need to take six measurements in total. The most critical measurement is the backset, followed by the centres measurement and the case size.
What are the parts of a mortice lock called?
The parts included in the typical US mortise lock installation are the lock body (the part installed inside the mortise cut-out in the door); the lock trim (which may be selected from any number of designs of doorknobs, levers, handle sets and pulls); a strike plate, or a box keep, which lines the hole in the frame …
How to measure the size of a mortice sashlock?
When replacing a lock or specifying new locks, the size is vitally important, this guide shows the methods required to measure a mortice sashlock. A – Case Depth, measurement taken from forend to end of the lock case B – Backset , distance from forend to centre of keyhole and centre of latch spindle C – Case Height, the height of the lock case
How many measurements do you need for a sash lock?
How to measure a sash-lock. To correctly measure a sashlock, you will need to take six measurements in total. The most critical measurement is the backset, followed by the centres measurement and the case size.
When do you need mortice lock measurements for a new door?
Mortice lock measurements matter the most for getting the right replacement for your pre-drilled door. When the door is brand new and there are no cutouts, the size isn’t as important to get right and precise. You will make cutouts on the door when fitting the lock.
What’s the difference between a mortice lock and a deadlock?
The good thing about mortice locks is that they are reversible so the doors’ orientation doesn’t matter. The most important difference between measuring a sash lock and a deadlock is that the sash lock has an extra dimension you need to take and it’s the most crucial one. This important part is called “centres’’. All other dimensions are the same.
