Low Cost Restricted Key Systems

[billdeserthills]

Another thought on creating a "type" of restricted key system...although it is not really restricted, just that most key cutters wont be able to cut keys that work. Locksmiths on the other hand would know this trick...

When creating system keys, file the bottom of each operating key before keying.

When the key sits in the barrel (plug), it naturally uses the bottom of the cylinder to guage height, but when the key is put into a regular duplicator, it cuts the keys too deep.

Not sure if I explained it quite right. Comprende?

Think you mean after filing, the key still sits the keyway the same due to the wards of the keyway. But when placed on a duplicator, the key with the bottom of the blade filed off sits lower in the vise of the key machine, so the duplicate is cut deeper compared to the warding.

Is that explaining it correctly?

Gordon

We used to do this for community pool gates & such, but the key can be easily duplicate if one uses the jaw that grips from the middle, instead of the
regular jaw that measures from the bottom. Once the 'secret' got out every hardware store around was copying the pool keys and for much less money
than the homeowners associations were charging.
The LSDA makes their own restricted keyway and it is very inexpensive. Also I have used the Lori 80 (5-pin) & Lori 90 (six pin) restricted cylinders I'm sure they
are still listed by Ilco

[DR_WOLFSBURG]

you could try lori keys there from american lock. SD, BP, EF, BB key ways and uses normal SC1 bitting and pinning. but i think thats an older keyway you would half to buy in.
you could try like schlage 1400 series keyway. 1458 keyway etc. even just use a common primus keyway