*Bump Keys are ON SALE*
All pins down- but cant turn the key
Posted 15 March 2007 - 08:03 AM
I got my bump key from the locksmith and i bump ordinary 5 pin lock!
I got it one or two times that it's opened, but i got a question!
When i bump the lock and i carefully take the key out ( the lock is still locked in the position that i push it with tension wrech), i can clearly see that there are all the pins down, but the key doesnt turn! :S
Does anybody know why ???
Posted 15 March 2007 - 09:06 AM
Posted 15 March 2007 - 01:00 PM
Well i have lock that has pins on the down side of the lock!!! When i bump the lock, the pins goes down and stay down so you cant see them if you look in the lock!!! They are pushed all the way down and they stay there, so it should open but it wont!!!
A pin tumbler lock will only open if all the top pins are above the shear line and the bottom pins are below the shear line. In lock bumping all the top pins have to be above the shear line and the bottom pins have to be below the shear line for the plug to turn and the lock to open.
A pin tumbler lock that is installed with the pins down poses a problem for lock bumping. Gravity is in effect. The bottom pins will move down with the top pins because gravity is pulling on them. The shear line is nearly impossible to achieve. Doable, but very difficult. Take the same lock, turn it over so the pins are on the up side and it is much easier to bump.
Posted 30 March 2007 - 01:10 PM