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The single bore hole is how most doors are commonly prepped. This is the large diameter hole where the lock is mounted and the standardized size of this hole is 2 1/8″. Through the edge of the door there is a 1″ cross bore that extends from the edge of the door through the bore hole.
What does door bore mean?
Bore holes are the holes in the door that house your door hardware and allow it to be installed. The cross bore is the main hole drilled into the face of the door where the body of the lock (chassis) is installed.
What does no bore mean on a door?
We refer to the round holes where the door lock is installed as “bore holes” (brush up on your door hardware terminology here.) Most doors have one, two or three bore hole. If the door has no bore holes, you can simply install a non-turning or “dummy” knob or lever that serves as a decorative door pull.
What is bore type?
Most interior doors are prepped with a single boor hole. The Bore hole is the large diameter hole where the door knob is mounted. The standard sized bore hole is 2 1/8″ in diameter. In addition to the two cross bores, a door can be prepped for one of 3 different types of latches.
What is a face bore on a door?
The “face bore” is the larger hole which is bored into the door face and a smaller “edge bore” hole is bored into the door edge. The edge may require additional preparation to receive the latch assembly, typically by routing or chiseling a shallow mortise.
Why do door latches have two parts?
The main latch is supposed to fall into the strike hole on the door frame, the little part is supposed to sit on the surface of the strike (not fall into the hole). This feature is meant to keep someone from retracting the latch from the outside of the door with a credit card or other device.
How is cross bore measured?
Standard cross bores measure about 1 inch in diameter. The latch bore can be found on the edge of the door, and its standard size is 2 1/8 inches. Also measure the door’s backset, which is the length straight from the middle of the cross bore out to the door’s edge.
Are door knobs standard?
To have the door function properly, you will have to make sure that the door knob you buy is the correct size for your door. The standard size for a door knob diameter is either 2 3/8 inches or 2 3/4 inches and these knobs will usually fit doors that are anywhere between 1 3/8 inches to 1 3/4 inches thick.
What is standard door latch size?
We generally recommend that a 76mm Overall Latch Size is ordinarily the best size for most lever handles. However the shorter 64mm Overall Size should be used where the door is glazed, to minimize the risk of hitting the glass rebate when drilling to fit the latch.
What is bore diameter?
The bore diameter of the barrel of a rifled firearm is defined as the diameter of the circle formed by the tops of the lands inside the barrel. This diameter does not include the grooves within the barrel. However, a portion of the mass of a fired bullet is extruded into these grooves.
What bore measurement?
A Bore Gage is used to measure the inside diameter of a hole or cylinder. This explains why it is referred to by so many different names. You are actually measuring the bore size. A bore is simply a hole and a bore gage measures the internal diameter of the hole.
What is bore in history?
bore, in weaponry, the interior of the barrel of a gun or firearm. In guns that have rifled barrels, e.g., rifles, pistols, machine guns, and artillery or naval guns, the diameter of the bore is termed the calibre.
What are spade bits?
Spade bits are for wood, plywood, and some plastics, and cut quickly with surprising precision. Use them only at high speeds, to prevent the bit from catching in the workpiece and the drill from trying to wrench itself from your grasp.
What are the parts of a doorway called?
Door part names Door frame. The door frame is the entire framework supporting the door, including the sill, jamb and head. Sill. The door sill is the very bottom part of the door frame that rests on the floor. Jamb/door jam. Head. Panel. Astragal. Fixed panel. Door sweep.
What are backset sizes?
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.
What is the hole in the door called?
A peephole, peekhole, spyhole, doorhole, magic mirror or door viewer, is a small opening through a door allowing the viewer to look from the inside to the outside.
