DOM Sigma
DOM Sigma
| DOM Sigma | |
 | |
| Name | DOM Sigma |
|---|---|
| Manufacturer | DOM |
| Lock Type | Cylinder |
| Lock Design | Pin-tumbler |
The Sigma is a pin-tumbler lock made by DOM. It combines six pins in the standard configuration with up to 12 passive pins.
Principles of operation
- See also: Pin-Tumbler (Principles of Operation)
The lock contains six pin stacks - two chambers contain spooled drivers, the rest are tapered barrels. Keypins are standard, with a signle exception being a torpedo.
Disassembly instructions
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.
Vulnerabilities
The DOM Sigma is vulnerable to one or more of the following:
Gallery
DOM Sigma key.
DOM Sigma keyway detail.
DOM Sigma pins detail.
DOM Sigma's core detail.
DOM Sigma's core detail showing passive pin chambers.
DOM Sigma's bible grooves for passive pins.
DOM Sigma's bottom of the bible showing the drill protection.
References
