I'm sure this has been asked or explored before, but I couldn't seem to find or locate the discussion, so I'll pose the problem again. I am working on a mixed-use commercial and residential project; the property has a few retail shops and some apartment units. I was thinking of installing kw10 locks in the commercial shops and kw1 locks in the residences.
I wonder if it is possible for these two keys systems to share a common lock. By that I mean, I would like to master key the shops with kw10 and the apartments with kw1. Furthermore, for common areas, I would like to maison key a couple of gates so that both the shop owners and apartment dwellers can use their respective keys to open the common area gates.
As I understand it, a kw1 and a kw10 share the same distance from tip to top shoulder, but the bottom shoulder of a kw10 key is offset more deeply, so that a kw10 key can fit into a kw1 cylinder, but a kw1 key cannot fully fit into a kw10 cylinder. Is it possible to take advantage of this property to install 5-pin kw1 locks on the common area gates, so that a 6-pin kw10 key can open those common gates as well as the particular shop the key was cut for?