keys and key systems david m. koenig, cpp. today’s topics common keys key system components master...
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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 KeyWork 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 !