How is a tubular latch measured?
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 size do door latches come in?
Choosing Latches For Your Door Handles or Knobs The most common size has a casing which is 63mm in depth and the distance to the middle of the square operating spindle is 44mm. This size of latch is used for the majority of lever handles on back plates, where the width of the back plate is about 40-45mm.
Are there different size door latches?
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.
What size backset do I need?
The backset size on a lock or latch case is the distance from the edge of the door to the centre of where the handle spindle passes through the door (or the key / turn where applicable), this is dimension ‘X’ below. For example, a 2 1/2 inch or 64mm latch has a backset size of 44mm and a total depth of 64mm.
What is a standard tubular latch?
A tubular latch is a simple spring-assisted mechanical device to keep a door closed without the use of a lock. It is mortice fitted into a door giving a flush finish rather than being surface mounted, and is the most commonly used latch in our homes.
What is a tubular door latch?
A tubular latch is an item of ironmongery which is usually morticed* into a door, which allows the door to be opened and closed by means of a Door Handle or Door Knob. Firstly, the Tubular Latch is without doubt, the most common type of door latch on the market today.
What is the backset on a tubular latch?
The backset is the distance from the edge of the door to the spindle mechanism on the latch. Usually for a 63mm case measurement it will have a 44mm backset and for a 76mm case measurement will have a 65mm backset. The backset you choose is where your door knobs will sit on the door (where the spindle goes through).
What is a 65mm latch?
An internal door latch allows you to close a door and keep it in place without locking it. 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.
How do you measure a mortice lock?
You can measure the mortice locks by measuring the backset and the centre. It is also advised you measure the case width and height and the forend length and width. Backset – The backset is measured through measuring from the centre of the keyhole to the forend of the mortice lock.