What is standard lock backset?

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. Pack your locks with a 2-3/8-inch or 2-3/4-inch latch, depending on which backset you specify.

How are locks measured?

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.

What is lock stile?

Lock stile – This is the vertical edge of the door which sits on the opposite side of the door to the hinges, and contains the lock or latch. Top mullion – This is the vertical element of the door that forms a division between different panels at the very top of a door.

What does 60mm backset mean?

‘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.

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 a 3 lever lock?

3 lever locks work in similar way to the above but with 3 levers and is used when less security is needed. These are generally fitted internally as insurance rated locks are not generally required in private domestic properties. All locks are usually supplied with a couple of keys as standard.

What are stile lines?

fenmaster. 7 years ago. No, stile lines is where it looks like there is a seam/joint between the vertical and horizontal planes of the slab. As if four pieces of wood made the slab.

What are the parts of a door lock called?

The main parts of a door lock are the cylinder, bolt, box and strike plate.

What is a sash lock?

A sash lock works by using a lock, latch & handle mechanism meaning you can open and close the door without the worry about it locking behind you and you don’t need the key each time. Available in a variety of security levels dependant on requirements, along with insurance approved mortice sash locks. Read more.

What is the difference between 3 lever and 5 lever locks?

The difference between a 3 lever lock and a 5 lever lock is that a 3 lever lock is less secure because it has fewer levers which increases the risk of key duplication. Also, a 3 lever lock will NOT be BS3621 approved due to the poor security of the lock.

How big is the backset on a door lock?

For conventional door locks, there are two backsets that are common, 2-3/4″ and 2-3/8″. Generally residential doors have a 2-3/8″ backset and commercial doors have a 2-3/4″ backset.

How to measure a backet for a lock?

The way to measure for your back set is you grab your tape measure go to the edge of the door and pull it across. Here we have this bottom hole drilled out for two and three quarters. You either measure at the center of the key hole or at the center of the lock on top I like to measure on top,…

Why do you need to measure the backset of a door?

The backset is an important measurement as it specifies the distance from the face of the lock to the centre of the keyhole. This allows you to correctly line up with existing holes in the door rather than drilling new ones.

How is the backset of a mortice lock measured?

The backset is measured by placing a tape measure or ruler from the center of the keyhole to the forend of the mortice lock. Please see the demonstration below: 2.