The Deadbolt Lock (Cylinder, Round Cylinder) has a diameter of 2.48” (63 mm), front depth of . 53” (13.5 mm), and latch depth of 1.18” (30 mm). The Deadbolt Lock (Cylinder, Round Cylinder) is a common door lock consisting of a cylindrical profile and housing a standard round cylinder.
All lock cylinders are 1.156" diameter. Brass blocking rings are used with lock cylinders like L-9CC when the lock cylinder protrudes from the door (or door plate) of a thin door.
Lock Bore The diameter of the hole for the lock body. The standard bore is 2-1/8”. Many older doors had bores that were been smaller. Most of the current locks require the standard 2-1/8” bore.
Crossbore. - The crossbore diameter should measure 2 1/8" or 1 1/2".
Finally, the backset of the deadbolt must match the door preparation. The two most common deadbolt applications are two and three-eighths and two and three-quarters of an inch backset. With this in mind, many manufacturers have designed deadbolt mechanisms that are adjustable between the two measurements.
Most deadbolt assemblies are a standard size, but you'll need to read the instructions or measure the assembly to choose the correct hole saw bit.
The deadbolt and door knob holes are often the same size. 2 1/8″ is common in the US. But this might vary and you need to check the specs of your hardware.
Step 2: Drill Holes
Hole size is 2-1/8" (54mm) for standard installations. Drill 1" (25mm) hole in center of door edge through to 2-1/8" (54mm) hole for latch.
The best way to measure bore diameter is with a Dial Bore Gauge. If your block needs machined, the shop will hone the bore. When the machining is done, they will tell you the final measurement.
A cross bore (face hole) is the largest hole where you mount a latch or deadbolt, and it must be 2 ⅛” (54mm) in diameter. A latch bore (latch hole) (25mm) is the small hole on the side of the door that extends from the cross bore.
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.
Cylinders by Others:
Adams Rite deadlocks and deadlatches are designed to accept standard 1" [25.4 mm] length, 1-5/32" [29.4 mm] diameter mortise cylinders of all popular makes. This means that the entrance can be keyed to match the system used throughout the building on other types of doors.
Cylinder – A complete assembled barrel and shell, including pins (tumblers), springs, etc. Cylinders come in various shapes and sizes, predominately round or oval. Barrel – The part of the lock that is turned by the key. The broach or keyway is cut into the barrel to hold the key in position.
Kwikset deadbolts can fit doors that are 1 3/8" to 1 3/4" standard. You can get a thick door kit to allow the deadbolt to fit on a door that is up to 2 1/4" thick.
Install the Strike Plate
Drill pilot holes for the strike plate's two screws with a 3/32-inch bit, then screw the plate in place.
Euro Cylinders range from 60mm up to 120mm, equal lengths from the central cam. Whilst Single or half Euro Cylinder locks typically range from 40mm to 50mm.
To measure your euro cylinder lock you simply need to measure from the centre screw hole to the outside edges. This will give you two sizes which makes up the size of your door lock. The two sizes should equal the overall length of the cylinder.
A borehole consists of a hole drilled between 60 to 200m deep. Typically, the diameter of a borehole is around 110 to 150mm, but this depends on the type of machine being used to drill the borehole. It also depends on the diameter of the borehole pipe, which is usually between 32 to 40mm.
The latch bore, also known as the edge bore, is the hole drilled from the side of the door into the cross bore to allow the latch of the lock to be installed and to accommodate the sliding of the deadbolt. The diameter of the latch bore is generally 1” to accommodate bolts from either mechanical or electronic locksets.
It Acts as a Drain Hole
And for a lock to survive the unpredictable elements, it needed to be able to drain any water that would get trapped inside, either through rain or amphibious use. This is first because the locks would rust if in contact with excess water, particularly salt water.