![]() ![]() They are be design not intended to have keys that are only off by one step in the same pinning chamber. So the "missing" master pin in size number 1 doesn't exist because the manufacturer knows the design tolerances of the lock, and in order to have locks that are the most reliable and secure that they can possibly be. Even more so when this "technique" is used on more than one chamber of the lock. It is a very undesirable condition that makes it much more difficult to rekey that lock into a properly designed system in the future without replacing the cylinder in question. I have seen this on countless locks that I have rekeyed. ![]() ![]() It is most commonly accomplished by pinning the lock to the shallower key bitting (in this case a 2) and then chamfering the pin chamber in the plug (usually done by hand with a drill bit) so that when the key with the deeper bitting is used the top pin will ride up on the now wider pin chamber opening in the plug and allow the lock to turn. or 0,2,4,6,8.) While it is possible to make keys only off by one increment in a pinning chamber work, your example was: "a 3 on the master and 2 on the change key", it is done by altering the lock in a way that weakens its overall security. 015") could easily find itself jammed in between the plug and the shell, which could interfere with the functioning of the lock.Īny properly designed master key system for Schlage locks would use a two-step progression, meaning that depths for a given pinning chamber would be two apart for different keys operating that lock. Someone else also posted that a master pin with an increment of 1 (which would be. This is because the difference between the increment steps is small enough that given the average cylinder tolerances keys off by only one increment in either direction (deeper or shallower) than the key intended to operate the lock can and will with a little bit of "jiggling", and that possibility gets easier as the locks become older and worn with use. 015" increments for its bitting depths, which means that when you properly master key Schlage locks you would have to use a two-step progression in your system design. Ok Philip, it is clear that you have a severely limited knowledge of master keying and how locks in general work as far as mechanical tolerances. ![]()
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