Schlage Primus cylinders provide a special dual-locking feature that delivers
excellent protection against physical attack and virtually eliminates unauthorized key
duplication. These high-security cylinders can be easily tailored to fit your exact
situation. Equally important, this revolutionary new system remains compatible with
numerous other Schlage key sections.
The heart of the Primus system is the patented “side-bit milling” along the key. This
unique geometric contour interacts with a matching set of finger pins. When a key
with the correct side-bit milling combination and a proper cut is inserted in the
cylinder, a conventional shear line is formed and simultaneously the sidebar gates of
the finger pins move into position to permit the cylinder to unlock. This dual-locking
principle makes the Primus cylinder highly resistant to picking.
For optimum security and to assist in reducing costs, the Primus key is designed to
enter a selected standard Schlage keyway, but the standard key cannot enter the
unique Primus cylinder.
Schlage Primus cylinders also include a product line that delivers extra protection
from drilling and other physical attack.
The Primus system eliminates unauthorized key duplication and provides
levels with increasingly restrictive key availability coupled with more selective
signature verifications and side-bit milling combinations.
Dual-locking allows all Primus cylinders to achieve the same high degree of pick
resistance. But if your installation requires the utmost protection against forceful
attack, choose the Primus 20-500 High Security cylinder.
With hardened, drill-resistant pins strategically positioned around the cylinder, the
20-500 meets Underwriters Laboratories Canada's tests for drill and pick resistance
(ULC file #CBP 532).
The Schlage Primus high security cylinder is precision built to extremely
close tolerances and the highest standards of quality. These "dual-locking"
cylinders consist of two independent locking mechanisms, operates by a
single specially designed Primus key. In addition to a standard 6 pin tumbler
mechanism there is a locking sidebar which is independently controlled
by a set of 5 fingerpins that interface with the side-bit milling (SBM)
on the patented Primus key. Schlage Primus products are covered by issued
and pending patents in the U.S.A. (4756177 and 4815307) and foreign countries
(New Zealand: 219080).
The side-bit milling operates the second locking mechanism and can be thought of as a unique "fingerprint" of the key.