|WO 2007/074163, EP1969198
The C3000 is a pin-tumbler lock made by CISA. It is the successor to the CISA C2000, offering increased protection against unauthorized key copying (security card, key protected by trademark, duplication only in authorized centers), resistance against key bumping, protection against drilling and also wax impressioning.
Principles of operation
- See also: Pin-Tumbler (Principles of Operation)
The lock contains six pin stacks - five of which contain spools and one is populated by a special pin-in-pin driver, referred to as the BKP (bump key power) device. Although this driver aims to thwart dynamic opening methods like bumping, it can frustrate single pin picking as well. Manufacturer mentions that due to the special shape of pins and their material (hardened steel) the lock is immune against wax impressioning. The lock is very well manufactured and feels very precise. The key profile is shaped to spell CISA, which aims to offer some protection against unauthorized keyblank manufacturing.
To disassemble a double euro cylinder, use of a pinning shoe is the preferred method.
Other possibility is to use a segmented follower, but that requires that both cores are pulled out a bit to allow a cam removal. Then a core should be rotated to approximately 4:30 or 7:30 o'clock position (135 degrees either clockwise or anti-clockwise) to prevent driver entering a gaps for the cam clutch. Then a segmented follower can be used to remove the core.
The CISA C3000 is vulnerable to one or more of the following: