deadboltdoorshole
I have a steel door in which I'd like to replace the deadbolt lock with a newer keypad type lock. The door is a bit older and the hole is 1 1/2 inches. The keypad deadbolt requires a 2 1/8 inch hole.
I've created a guide out of plywood as described in this thread and I have it lined up as best as I can. My question is, do I go all the way through to the other side of the door in one shot? Or do I do one side, then move my guide and try to line it up on the other side door?
First off, I make no warranty of any of these suggestions. Especially if this is actually a bank...
I would be hesitant to completely rely on an all-electronic solution, since if there is a failure (which, frankly, is likely with a budget of only 200 per lock), you don't want to have to resort to a plasma torch or something to cut open (and destroy) the door to get in.
What seems like an interesting option to me though would be some of the RF-controlled keyless locks on the market. These look like a normal deadbolt, but have an RF remote.
What would be needed in whatever is chosen is the ability to hook into it, specifically, you need two things:
I'm going to assume that you have some type of microcontroller running the rest of this setup. You didn't specify.. but presumably you have something that has some I/O on it, the ability to connect it to the locks, and some software running to handle what I describe below. I'll also assume that you have an alarm and monitoring.
To control the lock, ideally, you could hardwire in to it, and be able to apply a signal to lock/unlock all the deadbolts. Less ideally, you could hack apart the remotes, and have your controller effectively press the buttons on the remote(s) to lock/unlock. This adds unreliability since you're dependent on an RF signal.
Since these are keyed locks, you have a nice backup mechanism if everything fails: use the 4 keys to open the locks (and note, you'd need to be sure they're 4 separate keys).
Of course, since they're keyed locks, they're also susceptible to being picked/bumped. To try and combat that, what you can do is have your controller monitor each lock individually. If any of the locks ever open when the controller didn't tell them to, then it should trigger an immediate alarm (consider: someone is likely to pick/bump one at a time). If this is an exterior door, then this is your first line of defence, unfortunately. If it's an interior door, then you should also have motion and other door sensors that will hopefully trigger before someone gets to this door.
You also need to consider all other aspects of physical security. You're only as secure as the weakest point, so if someone can break through a window or wall or vent then it doesn't matter how good the door is. Physical security is also just a matter of time: eventually, you can get through anything. That's why I suggested having an alarm system connected, which is both a deterrent, and triggers a police/whatever response. Consider: safes, even high-end ones, are rated by the time it takes to crack them: your door will be no different. Having video cameras probably helps as well, both as a deterrent and to help catch people afterwards. Your video and security system also need to be protected, so that they can't just be disabled/destroyed.
On the other hand, too much security and you actually can attract attention. I've heard that the houses with extra locks, security cameras, etc, are often targeted by thieves since they look like they have something valuable worth protecting.
As for expanding the hole, I am still confident this post will answer your question.
Regarding the Schlage deadbolts, these are not great deadbolts. If you really want high security, you need to look at Mult-T-Lock or Medeco. These are far more secure for a number of reasons. First, they are made of much harder metals - if you feel them compared to another deadbolt there is a noticable weight difference. These deadbolts also often have balls at the end that push out of the bolt when fully expanded so it cannot be forced back in. Also, the keys for these locks can only be made (not copied) by the locksmith who originally created them (each locksmith is assigned a "keyway" and is the only locksmith who can produce the keys), this is handy if you have a cleaning lady or other service person since you can rest assure they cannot make a copy of the key for their friends. There are also metal rings you can put around a deadbolt that spin so that someone cannot use a wrench to twist if off.
If your doors hinges are on the outside then you can also look at having bolts installed on the inside of the door. This way, if the hinges are removed (pins popped out, or blown off with a shotgun), you cannot just pull the door off.
A heaver guage strike (the metal piece that goes on top of the hole where the deadbolt goes into) with longer screws will add extra strength to the deadbolt and hamper someone knocking down the door.
You can also place a cage in front of the door (which too has a deadbolt) but they are not attractive, and add an extra step to opening your door.
An alarm is useful but in a lot of cases, of someone knows what they want, they can be in and out before anyone responds.
A camera adds an extra layer of "don't mess with me" plus gives you a far better chance of identifying an intruder.
Best Answer
It's a metal door, so I wouldn't be concerned about it spalling out the other side; so yes, go through in one shot (same as a wood door: don't push too hard while finishing the cut coming out the other side).
If it does spall a little, peen it back flush with a hammer. It's better than the chance of miss-aligning it (then what?).