Mathematics for LFIC cylinders depends on which company manufactured the cylinders. Each company has its own pinning mathematics. To add to the confusion, some lock types have different pin totals depending on the individual pin space.
We now have a simple, free solution for how to pin 98 different types of lock cylinders. Subscribers can download a pinning software program from our website, www.locksmithledger.com. A loading program is included which will install a pinning icon on your start screen. The program will not operate on Apple computers.
The beginning screen shows a table with the 98 lock type choices (Photo 1). Use the sliding bar to display additional choices, then click on the lock type you are working on. A Best A2 system has been chosen for this example.
The next screen will display all possible tumbler amounts used by that manufacturer. Best IC core locks have been available as 5, 6 or 7 pin variations (Photo 2). Six pins have been chosen for this example.
Display 3 provides a choice of either a full system chart or a chart for pinning an individual cylinder (Photo 3). A single key chart is chosen for this example.
Display 4 requests key cuts for the specific top master key you are using. For this example the cuts entered were 010149 (Photo 4). After clicking on the TMK button, additional forms will be displayed which request the change key cuts being used (Photo 5) and the control key cuts being used. Change keys cuts of 256725 and control key cuts of 365476 were used for this example.
Display 6 shows the Best A2 pinning chart for the example key cuts (Photo 6). At the bottom of the same display, a pinning chart plus depth/space measurements are also displayed (Photo 7). Every popular domestic IC core or standard lock cylinder pinning chart can be displayed by using the same procedure.
Full Pinning Systems
Photo 3 shows a second “full system” choice. When “full system” is chosen, the program requests the top master key cuts as shown in Photo 4. If an IC core type has been chosen, an additional form will request the control key cuts to be used.
With a few exceptions, most commercial lock manufacturers use a two-step, 10-increment master keying system. If a master key cut is “0”, then the change key cut possibilities for that space would be some numeric order of cuts 2, 4, 6 & 8.
The program automatically develops a key bitting array dependent upon the key cut rules for the chosen key type. Key bitting array numbers can be changed, but in most instances the automatic display will include all possible cut numbers used by each manufacturer and dictated by the chosen TMK (Photo 8). The same 010149 TMK cuts and 365476 control key cuts were used for this example.
Photo 9 shows the final display. All 4096 possible change keys in this Best A2 IC core system can be pinned by using this one pinning chart page. Copies of either a single cylinder or full system chart can be printed by clicking on ‘print copy’ at the top of the screen.
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Use bottom pins that are manufactured of the same material as the original equipment keys. For example, use Brass pins with brass keys
The Interchangeable Core (IC) lock mechanism was developed as a simpler way to rekey locking hardware without removing the entire lockset/cylinder from the door. Interchangeable core lock mechanisms...