Nemef NF2

=Nemef NF2=

Nemef NF2 is claimed to be the best selling security lock in the Netherlands. It should be safe against manipulation, bumping and drilling (SKG2).

Description
The lock contains six pin stacks. Its most distinctive feature is the use of multiple diameter keypins, which together with a special warding causes the keypin tips at rest aren't at the same level. This should make bumping of the lock difficult at least. The pinstacks alternate between serrated and spooled drivers, but due to the way the keypins rest in the chambers, the spools effectively engage only when paired with three shortest keypins. All of the drivers have slightly tapered tips, which gives this lock its bad reputation among the locksporters. The warding is not very restrictive and the keyway itself is not paracentric.

Dissassembly 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 Nemef NF2 is vulnerable to one or more of the following:


 * Lockpicking
 * Decoding
 * Key bumping?
 * Impressioning