Kwikset Classic

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Kwikset Classic

Kwikset Classic
Kwikset keyway logo.png
Name Kwikset Classic
Manufacturer Kwikset
Lock Type Cylinder
Lock Design Pin-tumbler
Year(s) Produced 1950s - Present
Related Locks
Kwikset SmartKey

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.

Keying Specifications

Cut Spacing Depth Key Pin Master Driver
1 .247" .329" .172" .023" .180"
2 .397" .306" .195" .046" .180"
3 .547" .283" .218" .069" .180"
4 .697" .260" .241" .092" .180"
5 .847" .237" .264" .115" .180"
6 .997" .214" .287" .138" .180"
7 .191" n/a n/a n/a n/a

Key Blank Plug Diameter Shoulder to First Cut Root to Root Depth Increment Cut Width MACS
1176, KW1 ~.498" .247" .150" .023" .080" 4

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.

  1. Remove the cam or C-clip.
  2. Insert the key and turn the plug 45-90 degrees.
  3. Withdraw the plug from the cylinder. (A plug follower is recommended)


  1. Remove the chamber casings and take out each pin-stack individually
  2. Remove the cam or C-clip.
  3. Withdraw the plug from the cylinder.

Removing cylinders from Kwikset knobs

  1. Using the Cylinder Removing Tool, rotate the round spindle until the tab lines up with the bolt stems.[1]
  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.


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




See also