Figure 7. A key bitting specifications page contains a variety of information, including the number of depths, depth increment and progression type. Remember, when you cross key, danger lurks around every corner — and we face problems with lack of security, lost com- binations from our bitting list and poten- tial liability issues. Conclusion: Whenever possible, cross keying should be avoided. Record Keeping As stated earlier, all master keying should be in print first before ever pin- ning up a cylinder. Either a printout or a hand-written chart is acceptable; never depend on memory. And, make sure you keep a TMK register for every system. You’d be surprised to see how many number patterns reoccur when you supposedly “randomly” create them yourself, especially with regard to odd- even parity combinations. Conclusion: There’s More This basic review of split pin master key- ing has only slightly opened the door to an expansive area where mathematics and established procedures can combine with 48 KEYNOTES JULY/AUGUST 2017 creativity. To assist those wanting a firm understanding of master keying, there really is no substitute for taking a class. Books, manuals, articles, videos and CDs are excellent supplemental sources of knowledge, but experiencing a live, hands-on, one-on-one class is invaluable. This first article of four parts touched upon the broad concepts such as pro- gressions, KBA, SOP, parity, MACS, cross keying and key specs. It did not, however, address anything concerning selective masters, designing a master key system, decoding from the TMK, unplanned master key system contin- gencies, MACS management, multi- plex keyways, master keying LFICs and SFICs, master keying master ring cyl- inders, setting up for a keying confer- ence, expanding an exhausted system, progression types, progression methods and progression formats, as well as oth- er related topics. But, rest assured that the second installment of four is just a stone’s throw away and will take us to the meat of the topic: progressing. Stay tuned for more! A heartfelt thank you is extended to Bil- ly B. Edwards, CML, Jerome V. Andrews, CML, and John Hubel, CML, ICML, M.Ed for their assistance in preparing this series on master keying. William M. Lynk, CML, PS, ICML, M.Ed. has een a locksmith since 975 and is the owner of www.ICLSglobal .com. Bill is an IC specialist , an industry author, the subject mat ter exper t on IC for ALOA, and an ALOA ACE instructor, teaching classes on in- terchangeable cores and master keying across the country. He has originated SFIC Technical Manuals for both national and international lock manufacturers, and maintains a working relationship with the major lock and security manufacturers throughout the world. In 2013 and 2015, he was named Keynotes Author of the Year. WWW.ALOA.ORG
