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Master Keying David M. Koenig, CPP

Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

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Page 1: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master KeyingMaster Keying

David M. Koenig, CPP

Page 2: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying Is...Master Keying Is...

System Of Organizing Numbers– For Cutting Keys– For Pinning Locks

Grouping Of Locks And Keys Set Of Locks That Are Operated By More

Than One Key

Page 3: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying ProvidesMaster 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

Page 4: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying DisadvantagesMaster Keying Disadvantages

Makes Locks Easier To Pick Small Master Pins Increase Service Issues Higher Re-keying Cost If GMK Or GGMK

Keys Are Lost More Thought Involved In Administration Controlled Destruction of Lock Security

Page 5: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying TermsMaster Keying Terms

KA - Keyed Alike - Several Locks Operated By The Same Key

KD - Keyed Different - Each Lock Operated By It’s Own Key

Page 6: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying Terms Master Keying Terms

CK - Change Key– Work Individual Lock

MK - Master Key GMK - Grand Master Key

– Works Large Group Of Locks GGMK - Great Grand Master Key

– Fits All Locks In System

Page 7: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying TermsMaster Keying Terms

SKD - Single Keyed Different– Lock Set To Change Key Only

NMK - Not Master Keyed– Similar To SKD

Levels - Number Of Different Types Of Keys In System – Example CK-MK-GMK = 3 Level System

Page 8: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Master Keying TermsMaster Keying Terms

Sectional Keyways - Variety Of Key Blank Grove Sizes And Shapes– Divided Into Groups– Some Patterns Are Wider Than Others– Higher Level Patterns Fit Into Multiple

Keyways– Allows Cut Numbers To Be Repeated

1

Page 9: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

System Size and SecuritySystem 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

Page 10: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

System Size and SecuritySystem Size and Security

MACS (Maximum Adjacent Cuts) Loss How Many Masters Employed Sectional Keyways

Page 11: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Typical System ExampleTypical System Example

8 Depths (1-10 Less Two 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

Page 12: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Medeco Biaxial System SizeMedeco 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...

Page 13: Master Keying David M. Koenig, CPP. Master Keying Is... n System Of Organizing Numbers –For Cutting Keys –For Pinning Locks n Grouping Of Locks And Keys

Medeco Biaxial System SizeMedeco Biaxial System Size

Equals 36,864 Changes Under Single MK With MACS Loss Of 20% Combinations

(Maximum Adjacent Cuts) Over 29,400 Maximum Combinations Number Of Chambers Used For

Master Keys Reduces Maximum And Determines Availability Within A MK