Keys and Key Systems David M. Koenig, CPP

Today’s Topics Common Keys Key System Components Master Keying High Security Key Systems

Common Keys Schlage Key Blanks (Most Common in our area)

Common Keys Other Key Blanks (Residential) Kwikset Weiser Yale

Common Keys Other Key Blanks (Commercial) Best Sargent

Lots of Different Key Blanks

Sectional Keyways Sectional Keyways - Variety Of Key Blank Groove Sizes And Shapes Hierarchal Groups Higher Level Patterns Fit Into Multiple Keyways Allows Cut Numbers To Be Repeated

Sectional Keyways

Key System Components Key Blank Pins Springs Cores Cylinders Tailpiece

Key System Components Tailpiece (Cams) Connects to rear of cylinder, operating rest of lockset

Key System Components Cores And Cylinders Cylindrical Mortise / Rim Interchangeable (Bored) (In) / (On)

Key System Components - Pin Kit * Top Pins * Bottom Pins * Springs

Key System Components Key Machine (Duplicator / Code)

Original Keys Key code stamped on key With this number can duplicate key !!

Keys Matched to Pins Key Cuts Fit Pin Lengths

Master Keying Is... System Of Organizing Numbers For Cutting Keys For Pinning Cores (Locks) Grouping Of Locks And Keys Set Of Locks That Are Operated By More Than One Key

Master Keying Provides Convenience Over Security Separate Keys For Individual Locks Keys To Operate Groups Of Locks Single Key For All Locks In System Ability To Carry Fewer Keys Organization Of And Management Of Lock & Key System

Master Keying Disadvantages Makes Locks Easier To Pick Small Master Pins Increase Service Issues Higher Re-keying Cost If GMK Or GGMK Keys Are Lost Cross Keying potential Controlled Destruction of Lock Security

Keying Terms KA - Keyed Alike - Several Locks Operated By The Same Key KD - Keyed Different - Each Lock Operated By It’s Own Key

Master Keying Terms CK – Change Key Work Individual Lock MK - Master Key Work Single Group of Locks GMK - Grand Master Key Work Large Group Of Locks GGMK - Great Grand Master Key Fits All Locks In System

Master Key System

Master Keying Terms SKD - Single Keyed Different Lock Set To Change Key Only Common Keying (Maison keying) Levels - Number Of Different Types Of Keys In System Example CK-MK = 2 Level System Example CK-MK-GMK = 3 Level System

System Size and Security 5 Or 6 Pin Chambers (more is better) Chamber Depths Pinning Increment (Key / Pin Wear) How Many Chambers Are Progressed Angles (Or Other Factor) Employed

Master Keying Technical MACS (Maximum Adjacent Cuts) Loss How Many Masters Employed Number Of Chambers Used For Master Keys Reduces Maximum And Determines Availability Within a MK

Typical System Example 8 Depths (1-10 Less One for MK) Less Increments of Two Used In 6 Chambers Equals… 4 To 6th Power Equals… 4,096 Theoretical Combinations Less MACS Of 20% Equals 3,276 Maximum Combinations

Medeco Biaxial System Size 4 Depths (1-5 Less One Number For GMK) Used In 6 Chambers Equals… 4 To 6th Power Equals… 4,096 Theoretical Times 9 Sections (Angles) Equals...

Medeco Biaxial System Size Equals 36,864 Changes Under Single MK With MACS Loss Of 20% Combinations (Maximum Adjacent Cuts) Over 29,400 Maximum Combinations

High Security Key Systems Typical Manufacturers * Medeco * Primus * Assa * Keso * Multi-Lock

High Security Key Systems What Creates High Security * Restricted Key Blanks - Patent Protection * Contractual Requirements - Key Record Control - Key Machine

High Security Key Systems What Creates High Security * Physical Characteristics - Angles, Side bars, etc. - Hardened Components

High Security Key Systems What Does High Security Provide * Key Control * Pick Resistance * Drill Resistance * Bump Resistance

The End Thank You !