(picking 745) The FORBIDDEN ZONE of safe combination locks explained 

Sooooo grateful for this. Just naively played about with my chubby lock and am stuck with the very problem you demonstrate. I am soo lucky to have you here!

0:00 intro, 1:17 parts explained, 3:42 mounting options, 7:44 code change, 10:23 locked in forbidden zone, 13:34 totally messed up in forbidden zone. Mechanical Safe Combination Locks have a forbidden zone. In this zone you cannot choose the last number - otherwise the lock will bind. Why this is and how this relates the correct mounting for the bolt orientation is subject of this video.

Nice video, It's always fun to play with combination locks!

Great video, Knowing the rule and why it's there makes you want to follow it!

I've been wondering/hoping you would get into mechanical safe combo locks! Looks like you have! I'm in the process of learning manipulation, at first I was quite overwhelmed with all the aspects of the topic.. In fact I still am, lol. Hope to eventually learn as much as I can to be able to open my S&G that I mounted to a piece of plexiglass.. Anyway, great video.. would love to see more on the topic of safe locks.. Take care Potti!

Forbidden zone of "Zero through Twenty" i0-20) is stated in the instructions for, La Gard Mechanical Group 1, Group 2 & Group 2M Locks. "When selecting a combination, choose a three number sequence from 0 - 99. Never select numbers 0 to 20 as the LAST NUMBER of the combination. This is the “Forbidden Zone” and can cause the lock to malfunction." Perhaps this is why the safe left behind and provided by landlord for new jeweler tenant does not open with the provided combination, the last number is (18).

Thank you for your time this is very interesting.

Brilliant :D I am happy that you explored it so much in detail :D

Interesting, thanks for showing this.

Btw the forbidden zone would be good if you use the safe only for fire resistance and theft isn't a concern, can just turn dial to open

Great Video! Thank you!

Thanks for this Video!

Very interesting thanks for the video 👍

Changing the spline key could actually be a solution if you want to set a last number which is in the forbidden zone. Basically, moving the forbidden zone out of way. Note that changing the spline key means you need to offset your combo with +25 or -25 or +-50 when opening the lock for the first time (or setting it up for change) - and THEN dial your combination without offset when setting your new combo up. This means your lock will internally be set to an offset position, but since the spline key is in a "incorrect" or "changed" position, the dial will read the combination correctly. So if your current combination is 20-30-40, and you want to set combination 85-12-02 , you change the spline key, lets say you choose one that is 180* off. Then you need to dial 70-80-90 as combination, then open the safe, and then dial 85-12-02 when changing the combo, and then close. Afterwards, your combination will be 85-12-02 and your forbidden zone is at 50-60.

I didn’t know about the “forbidden” zone, this was a interesting lesson.

Great video

Very interresting my friend

Great video 👍🏻

Very nice demo of the "Forbidden Zone" -- RH = Right Hand (Not Right Horizontal), similarly LH = Left Hand (Not Left Horizontal) as the correct and accepted terms, but very well done -- got all the other terminology correct -- Excellent -- Good Job -- Now try a 4 wheel Vault Lock

Hi, great Vid! One thing though, (And I have tried to find this out) How does an "Auto Dialer" know when it has found the first Number? To me, the correct position of the disc, could be just "Anywhere". How does it know when it is at the exact position needed, and then, to go on and find the other two disc's, positions? If you can find the time to help me with this, I would be very greatfull....Thanks,.....Geoff

Klasse Video! 🙂

Very interesting! - thanks for showing. So if the lock was stuck on a closed position because of the bad combination you found (where you explained in the addendum), how do you recover from that? I guess you open it up and pull off the arm (with the nose / tooth) and pull back the locking bolt, but what do you have to do then then reset it to a good code? When inserting the change key & turning it, you're meant to do that with the arm (with nose / tooth) in place, but if it is in place then would it be stuck? Would you then have to take the wheels about and reassemble them in different positions? Another question, can you pick this lock? Cheers!

So if the lock has 3 digits its a 3 wheel and 4 digits its a 4 wheel lock?Thanks

also whay at unlocking point is finally changed from 0 to other number like 40

I had to look back and forth through this video a bit to understand the reason for the forbidden zone - but I understood after two passes :o) It's the relative positions between the top main drive disc and the first driven disc down the stack - there must be a couple of pins between those two that connect them together at one point in the rotation.....and when in the forbidden zone, that interaction prevents the first driven disc from rotating as it needs to, to allow the fence up. Would Victor allow you to dismantle the code wheels to show us that do you think ?

I have been the same problem, how to

I have the same problem, how to fix it?

is forbidden zones happened at vd point only or all RH,VU,LH

What's the keyhole for? Never seen or opened a safe with a keyhole on the dial

I hate myself when I put the dial on the inside. Real hard to get in again. My S&G safe is quite antique. No key hole on the dial. The door is full of concrete. I came here hoping a lube of the plates would be included.

Great video! Do you know the make and model of this specific lock?

Why yes this safe is secure. The door is constructed of three inches of solid apple wood!

What model lock is that?

Please help me

My lady friend also has a tiny forbidden zone.

:-)

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Amazing Video Portti314 . Very Cool Video & Great Work. Keep up the great work. ‪Nick🧔🏽, RU-vid🔐: Lock Pick Nick & Nicholas Aarons.‬