What is case size on a lock?

The case depth is often simply stated as the ‘lock size’. There are many different case depths but the most common sizes are 64mm and 76mm. This is the metric equivalent to 2.5″ and 3″ lock cases from back in the imperial days, you may well have heard the term “3 inch lock case” and so on..

What is Yale Lock backset?

The backset on a night latch is the distance from the centre of the keyhole to the edge of your door, you will find most night latches will have a 60mm backset.

What is backset size on a lock?

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 the difference between a Sashlock and a deadlock?

A deadlock is a mortice lock which has just a key hole and a bolt. A sash lock has a bolt and a latch and a pair of handles. The deadlocks on a mortice lock also mean that if a burglar breaks in through a window they can not escape through the door, providing you have not left the key in the lock on the inside.

What height should a Yale lock be?

When it comes to what height the fitted latch should be when installed, the usual height is about 1500mm from the ground but there are no rules.

What is a 60mm backset?

‘Backset’ is the distance from the front of the lock to the centre of the spindle as shown here. 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.

How do I know what size door lock I need?

You can work out the size of the lock by measuring the distance from the edge of the door to the centre of the door handle or knob. This measurement will give you the approximate size of the backset which will allow you to identify which size lock or latch you have.

What does backset mean?

The backset is the distance from the edge of the door to the center of the 2-1/8-inch bore hole. In the United States, there are two common backsets for residential door locks: 2 3/8 inches and 2 3/4 inches.