BUMP KEY PROBLEM

[FIDO]

I have researched bumping from toool and tobias books etc, i still cant master it, i finally bumped a yale 5 pin, but cant bump anything else.. I found that if i put pressure on key when i insert it into keyway and use torque as well as in and out motion i can open my yale lock... maybe the key was all 999 cuts, any help would be appreciated...

Bryan

[Octillion]

What seems to work good for me is keeping a very light torque on the key while quickly tapping the key in. The torque I use is a bit lighter than I would normally pick the lock with. Also, you want to hit the key in quickly, without hitting it in hard.

Whatever it is you use as a bump hammer, start off holding the hammer close to the hitting surface, and gradually move your hand down further along the shaft as needed to be able to quickly but fully hit the key into the lock. A lock with 7 pins and heavy driver springs will require a harder hit than a wimpy 5-pin Kwikset. Hitting the bump key with a lot of force will work, but it is more damaging to the lock and bumpkey, so you should use as little force as necessary.

Hope this helps

[specialist]

What method are you using? Bumping usually has a high success rate. Is your key properly cut? There are various methods discussed throughout this site. I find the most effective method to be pulling the bumpkey out 1 cut and then "bumping" it. Good Luck


Specialist

[Chucklz]

Like Octillion, I prefer to use a light tap. But that could be because I demoed the technique I use to him. Always try for the lightest force you can use to accomplish what you need. It helps to have a properly cut key, and a lock that doesnt have MACS bitting.

[pizarro]

A quick and simple question, so bump keys work if the pins in the lock are pointing up rather than hanging down? I think the Physics means that it should be technically feasable, but I'm just wondering.

[devildog]

How much are you taking off the shoulder? Have you tried filing down all the '9' cuts on your bumpkey just a little bit extra, like the eqivalent of half a cut for the key you're using?

[Omikron]

A quick and simple question, so bump keys work if the pins in the lock are pointing up rather than hanging down? I think the Physics means that it should be technically feasable, but I'm just wondering.

Yes, bumpkeys work regardless of the lock cylinder's orientation.

[pizarro]

I take it that pickguns also work irregardless of lock orientation, because they basically work off the same principle. cool Looks like I will have to go make a pick gun then.

[FIDO]

thanks for the replies guys,

just too heavy handed i guess... i,ve opened a few including corbin 5pin, but i used it like a rake when i cut the key and this seems to work better than bumping...

everytime i pull back one cut, i push in slightly to feel the spring on the pins but the key keeps pushing back into the lock. do you keep the spring tension onthe pins before you hit or do you just pull back one cut and hit?

thanks