Notes on Picking Pin Tumbler Locks > 자유게시판

If this happens, you won't get the lock open until you release torque and start over. The lock mechanism can open when the notches on the disks are lined up at a particular rotation. Both the pick and the torque tool also amplify and transmit feedback about the state of the lock back to their user. If you release pressure with your pick while still applying torque, the bottom pin will drop freely, and will not have any spring pressure if you try to push it back up. The pins toward the back may feel a bit different from the pins in the front. Then we suddenly ask the question, "But how did this bit get there? Practice distinguishing between the pin states and then finish picking the cylinder. As you lift the pin stack with torque applied, eventually its cut will reach the shear line, allowing the plug to turn; the top pin will then be completely trapped in the shell, while the bottom pin stays in the plug, no longer held down by spring pressure. Longer handles are as a rule better in torque tools; the farther from the plug the torque can be applied, the easier it is to detect and control fine movement.

Small digits represent short bottom pins (that must be pushed up more to reach the shear line); large digits represent longer bottom pins (that need only be pushed up a bit). If pushed up, it eventually sets and the plug turns slightly (and the pin stack's state changes to set/not-binding). Now the plug is being prevented from moving by the next most misaligned pin (which, in this case, is the other pin, since there are only two). Now re-apply torque and set the first binding pin. It's possible that the plug will turn as soon as you set the first pin; if this happens, it's because you inadvertently lifted the other pin with the shaft of your pick while you were working on the first one. In particular, you should feel when you set a pin as much in the torque tool as you do in the pick. It feels much as it does when binding and unset, but will not set (since a binding pin can only move up, not down). It becomes distinguishable from an unset/binding pin stack when you try to set it; while it binds, it does not set, no matter how much further it is lifted.

Much of this is simply a matter of individual preference, but certain choices here can also have an impact on performance. Many manufacturers outfit their picks with elaborate and supposedly "ergonomic" handles, but these often hinder performance as much as they might enhance it. While the LAB picks are quite nice, their small size makes them rather delicate and easy to bend or break, especially as you're learning how much lifting force and torque are involved. A very tight grip is not required, nor is great force used. Carom shots require precise control of the cue ball’s speed and direction, making them a great way to showcase your mastery of cue ball manipulation. Note that the pick should be held mostly by the shaft of the tang, not the "handle." This allows better control and feedback. Note that these locks have been deliberately pinned with a short pin behind a long one. Note how the wards extend across the front of the pins; this is called a "paracentric" design in locksmithing parlance. Billiards is a traditional tabletop game played with balls, sticks called cues and a specialized table. Once you've mastered the two pin lock and can distinguish reliably among pin states, you should have little trouble with a three pin lock.

First, apply light torque (as you practiced in the previous exercises) to the two pin cylinder and gently feel each pin. Now release torque and try again, but this time lift the pins as little as you can when you test them, while still distinguishing between the two states. Try each of your torque tools in the lock. It's hard to learn these skills all at once on off-the-shelf commercial locks, but that's what many people who try to learn lock picking end up doing (before giving up in frustration). Take frequent breaks, and don't try to complete the whole course in one day. We are not very particular about what sounds, but just listen to the whole natural flow of sound as you would listen to music. An alternative technique, which I have not seen mentioned in the literature, is to first determine which pin stacks have security pins and which have regular pins (by picking normally and noting which stacks are false set). You should already be able to distinguish between an unset pin that isn't binding, an already set pin, and a pin that is binding. Left: The correct key lifts the pin stacks to align the cuts at the shear line.

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