CISA Security Profile (SP) Lock

[fgarci03]

Today I got in the mail a new lock to play with.

The CISA SP - Security Profile (is there another name for it?)
Basically it's a pin tumbler with a nasty keyway. Reminds me of an ASSA Twin I saw some time ago:


In addition to the keyway, this lock has 4 ball bearings (2 on each side) as a passive system to restrict keys.
Here's the plug:



On one of the sides (the second image) it only takes 2 ball bearings that are let inside the plug by 2 dimples on the side of the key. On the other side (the first image), the chambers are deeper, so it also has 2 pins before the ball bearings:


Here's the pin configuration for this one:


3 spools, 1 serrated(?) and a regular driver pin. The first key and driver pins are hardned for anti-drill protection. It also has 2 other anti-drill pins on the cylinder:


And here's the key, pins and plug:


As for the housing, it's not rounded from the inside. Any guess why that happens? The image isn't very good, but you can see the squarish shape of it:


Now off to picking it!

[GWiens2001]

I suspect the 'squared off shape' of the lock cylinder is because it is a cheaper way of giving those ball bearings a place to go outside of the plug to lock it in place unless the key with the correct passive bitting is used.

Very nice lock.

***Wipes up drool***

Gordon

[ARF-GEF]

Really cool lock FG
Look around on the net for ABUS XP1 it's the exact same lock. The probably gave each other the patent to produce that lock
Abus and Cisa are known to exchange types every now and then so it's not too surprising

[Rickthepick]

I bet thats a right fooker to pick!

Any luck?

[zeke79]

Also check out the abus TS5000. If I recall correctly it is identical to the cisa except for the keyways being mirrored.

Picking is not easy but not overly difficult if you make the right tool. The way the keypins actually sit against the broaching means that unless the pins in the rear of the lock set lower than any pin in front of them you cannot use a conventional pick to open the lock. I simply made a new pick from feeler gauge. I formed the pick as you would a dimple pick which only slides the thickness of the material stock between the pins and the broaching they rest on and then uses the peak of the broaching to rock the pick against to lift the pin. Instead of lifting the pick handle up and down, you twist it much like you would use a screw driver to adjust a screw. I did use a much thicker material stock than you would normally use for pick making and then thinned down only what had to be thinned down on the working end of the pick so it was as strong as possible since you pick using a twisting force. I also filed a ramp on both sides of the working end that slides under the pins which made it easier to slide the pick forward under a binding pin to lift it and also made it easier to slide under a binding pin when sliding the pick from the back of the lock to the front. Hopefully with the sketches this description will make some sense and hopefully I am thinking of the right locks since the image host you are using is blocked on my work computer.

Here is a rouch sketch of the pick I made for these locks to better explain what I am talking about. These of course are not to scale or any proportion whatsoever so you will have to work slowly to fit the pick to your lock while making it. It was tough getting the bend in the pick right that would allow enough rocking motion to lift the higher setting pins. I ended up overworking the metal on the first pick getting the bend right and had to make a second pick so the metal was not so fatigued. When making the first pick and adjusting it, dont actually try to pick the lock. Only bend the pick and test the rocking motion under the first pin with no tension to see your range of lift then adjust accordingly.



Closer view of the working end of the pick.

[fgarci03]

I bet thats a right fooker to pick!

Any luck?

Still not


@zeke79:
Awesome idea! I had though about filing down one of my dimple pick ends to fit there, but this might be even better than that!
I gotta give it a try!

Thanks