Kwikset Classic

=Kwikset Classic=

The Classic is a pin-tumbler lock made by Kwikset. It is one of the most common cylinders used in residential door locks in the United States. The KW1 keyway used by the Classic is extremely popular in North America, with many other companies providing interoperable locks and keys.

The Classic is slowly being phased out by the Kwikset SmartKey due to concerns over key bumping.

Principles of operation

 * See also: Pin-Tumbler (Principles of Operation)

The Classic is a traditional pin-tumbler that uses five pin stacks. To open the lock, all pin stacks must be aligned at the shear line to allow the plug to rotate. There are six key pin heights and seven key cut depths, the seventh only used when combined with master pins or construction balls. The Classic has a MACS of 4. Many Classic cylinders come with construction keying dimples on the plug.

The Classic uses key pins that are slightly tapered on both ends. Classic cylinders do not require use of any security pins, but often come with a couple spool drivers.

Disassembly instructions
The Classic can be disassembled with standard pin-tumbler disassembly. The design of the pin-chamber casing facilitates quick disassembly and full rekeying.

Removing cylinders from Kwikset knobs

 * 1) Using the Cylinder Removing Tool, rotate the round spindle until the tab lines up with the bolt stems.
 * 2) Slide the tool under the spring housing behind the spindle and push to release the retainer. Pull out the spindle without rotating it.
 * 3) Slide the tool into the empty spindle chamber, angling it to bypass the cover at the top of the hole. Push the tool all the way in and apply pressure until the cylinder is forced out of the front of the knob.

Vulnerabilities
The Classic may be vulnerable to one or more of the following:


 * Lockpicking
 * Bumping
 * Impressioning
 * Decoding

Notes
 * Poor tolerances allow tryout keys to work.