# How do you measure a backset on a mortise lock?

How do you measure a backset on a mortise lock? Backset of existing hole(s), measure from the edge of the door to the center of the hole, usually either 2 3/8″ or 2 3/4″ (see B on diagream at right) Measure from center of top hole to center of bottom hole (only if two holes are drilled) Measure from floor to center of bottom hole.

How do you measure a Mortice lock backset? Backset – The backset is measured through measuring from the centre of the keyhole to the forend of the mortice lock. Centres – This will need to be measured if you are installing a sashlock that will allow the lock to be operated by a door handle.

How do I measure my backset? The backset is the measurement from the edge of the door to the center of the bore hole. Most door handle sets feature a 2-3/8″ or 2-3/4″ backset. To determine the backset on your door, measure the distance from the outer edge of the door, to the center, or highest point of the bore hole.

What is backset size on a mortice lock? 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. The most common sizes here are 44mm and 56mm (give or take a few millimetres).

## How do you measure a backset on a mortise lock? – Related Questions

### What is the backset on a mortise lock?

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 do I know what size door lock I need?

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’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. 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. Mortice locks have several lever variations: a 2, 3, 5 or 7 lever mechanism.

### What is standard backset?

Standard backsets are either a 2 3/8″ backset, or 2 3/4″ backset. The most common backset is 2 3/8″ but 2 3/4″ is also quite common – usually used on exterior doors. You can measure from the edge of the door to the center of the backplate behind the knob.

### What is the standard height of a door handle?

All door handles, pulls, latches, and locks should be installed at least 34 inches from the finished floor. On most people, this means that the door handle will be comfortably situated around their hip area. On the flip side of things, your new door handle should not be higher than 48 inches above the finished floor.

### 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 is a lock case size?

Backset’ is the distance from the front of the lock to the centre of the spindle as shown here. To do this, measure the ‘backset’ distance of your old lock.

### What is a mortise style lock?

Mortise locks are assembled from many curiously odd-shaped, mechanical parts and enclosed inside a heavy-gauge steel case, punctured with circular and square holes that appear to represent a secret code. Mortise lock ‘bodies’ are mysteriously hidden inside a pocket, cut into the edge of the door.

### What is the difference between latch and lock?

A lock prevents anyone without a key from opening a door/gate/etc. A latch keeps something closed but does not lock it. A latch is a very simple device that keeps a door or window closed.

### What is a mortice sash lock?

A mortice sashlock is a combination of a latch and deadlock. They are used to open and close a door and can also be locked with a key from both sides. The latch is operated by a door knob or handle and you usually cover the key hole with an ‘Escutcheon’.

### Are bathroom door locks standard size?

Standard case sizes for full bathroom locks are 63/64mm and 75/76mm. The 63/64mm size tends to more widely used, however sometimes the design of your door may require a different size.

### What is the standard size hole for a deadbolt?

Be sure to use the correct size drill bits specified in the lock set instructions, though most standard deadbolts require a 2 1/8-inch hole saw for the lock bodies and a 1-inch spade bit for the sliding bolt assembly.

### Are door handles a standard size?

Measure from the edge of the door to the centre of the door knob or handle. The industry standards are usually either 44mm / 57mm / 82mm / 107mm / 130mm. Ideally you will try and choose the backset measurement that sites the door handle in the middle of the door stile.

### Can a locksmith open a mortice lock?

Locksmith should be able to remove broken piece,using broken key extractor removal hooks/needles, & extractor pilers. Locksmith might even use curtain picks to open mortice lock. Very handy tools to have, bought a set years ago. Could give lock a does of WD40 to loosen things up abit.

### What type of door lock is most secure?

Deadbolts. Deadbolt is often considered the most secure type of lock. What makes deadbolts unique is that they cannot be moved easily from the locked to unlock position. All deadbolts require some type of rotation to disengage the lock.

### Is a Sashlock a mortice lock?

Mortice locks can be known as a Deadlock or Sashlock. They both have essentially the same operating system, with the distinguishable difference between them being the use of a handle that operates a latch within a sashlock.

2-3/8″ or 2-3/4″ backset latches are non-adjustable.

### Are front door handles standard size?

The most common are 2 3/8 inches and 2 3/4 inches, but some hardware can fit multiple backsets. Make sure the hardware you select fits your door.

### Why are English door handles so high?

Historians say one of the reasons for their introduction was to make a room which had high ceilings appear cosier and it was an optical trick to bring the ceiling height down. Door handles may have been fitted high to follow this theme.

### What is side of door called?

Door jambs are the interior sides of the doorframe. The word “jamb” comes from the French word jambe, which means “leg” – and door jambs are sometimes also called the “legs”.

### Is it easy to fit a door lock?

Replacing door locks is a relatively simple DIY project. If you know your way around a basic screwdriver, you should be able to tackle it in under an hour. Full installation instructions come with the new locks and customer support hotlines are often available to answer any questions.