by ltdbjd » 23 Dec 2016 9:44
1st question I think of is why you are trying to get into a lock at work, and why don't you have the correct key. We always wonder about that when people are trying to get into a lock at work but don't have the correct key.
Second question is whether or not you have had the key duplicated recently? That could be the issue.
Schlage makes a large variety of keyways. You have to know what keyway you have to find the correct blank. Schlage does make thinner keys - but these are typically thinner in the warding (the "zig-zag" part, not the top of the blade where the cuts are. They are usually the same on the bottom in most cases. G, K and L keyways are an exception.
These keys are typically used in master keying very large projects. Typically, the H, J, and K are used as master keys, when you are using multiple Schage keyways in your system. You can then build upon that system by using an L keyway as your grandmaster, because the 1145L/A1145L will fit all Schlage keyways.
The 8/9 you mentioned is an E keyway (aka 1145E or A1145E). It will only fit in an E cylinder. I'd be surprised if your system uses an SC20. If you are going to use the key frequently, you really need to find the correct keyway. Trying to use submasters, masters and grandmasters from senior keyways is sloppy, can result in premature wear, and it's easier to bend or break them.
I have to leave for work, so unless somebody beats me to it during the day, I can provide you the link to the Ilco key manual tonight, which will show you the profile of the keyways.