What are backset sizes?

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 my backset size?

Bore a 2-1/8-inch hole through the door. The center of this hole should be located 2 3/8 inches or 2 3/4 inches back from the edge of the door. (This is the backset dimension.)

What is a backset measurement on a door?

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 backset should I use?

If you dont have any hardware on your door, just measure from the edge of the door to the center of the bore hole (the large hole where the door knob assembly is mounted). The most common backset is 2 3/8″ but 2 3/4″ is also quite common – usually used on exterior doors.

How do I know what size sash lock I need?

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.

How do I know what size internal door handle I need?

How to Measure Internal Door Handles

1. Door Thickness – Measure the door from the inside to the outside.
2. Door Height – Measure the door from the bottom to the top of the door.
3. Stile Width – Measure from the edge of the door to the edge of any molding, panelling or glazing on the door.
4. Backset –
5. Centre-to Centre –

How do you know what size door latch?

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 is the standard backset for a door lock?

Backset The distance from the edge of the door to the center of the lock bore. Two standard backsets are 2-3/8” and 2-3/4”. Other backsets include 2”, used by National and Lori Lock, and 5” used by Weiser, Weslock, Kwikset and others.

What is the hinge backset for a door frame?

Hinge backset is the dimension from the leading edge of the hinge to either the stop on the frame or to the stop face (push side) of the door. For operating clearance, the hinge backset on the door is 1/16″ less (smaller) than the hinge backset on the frame. The method or measuring hinge backset varies between SDI and NAAMM/HMMA.

What’s the standard size of a front door?

The standard size for an exterior door is 80 inches (6 feet, 8 inches) by 36 inches (3 feet). Stock exterior doors are also commonly available in 30-inch and 32-inch widths. The standard door thickness is 1 ¾ inches. Some door manufacturers carry stock doors in 7-foot and 8-foot heights and door widths from 24 inches to 42 inches.

What are the dimensions of a patio door?

The standard size is 6 feet, 8 inches tall and 6 feet wide. However, patio doors are routinely available in 6-foot, 11-inch and 8-foot heights. Door parameters: A standard, interior, hollow-core door is classified as a measurement. The most common residential bedroom doors are a 2 feet, 6 inches by 6 feet, 8 inches.