Trying to understand sfic...

[MatrixBlackRock]

As I understand it, the order of the pins in a 4 pin sfic A2 stack are: bottom pin, master pin, build-up pin, and top pin. My question is, if I cut a key that puts the master pins at the shear line in all chambers across the lock, will that likely be a master key for that system? Sounds logical to me, but I'm still a beginner with these locks.

Thanks

Here's a article that might help.

http://www.matrixblackrock.com/Assets/BDC.pdf

Wayne

[MatrixBlackRock]

If you don't have the decoding tool, you might be able to get the caps off with a small drill and a small screwdriver (drill a hole in the cap, place the screwdriver in the hole, then gently pry the cap out) and then use a paper clip to push the stack out. I've never tried to install caps without a capping tool, but it may be possible.

Just turn the core upside down and using a small steel rod just punch the pins, spring and cap out, that is how it is designed to be de-cored.

Wayne

[tpark]

If you don't have the decoding tool, you might be able to get the caps off with a small drill and a small screwdriver (drill a hole in the cap, place the screwdriver in the hole, then gently pry the cap out) and then use a paper clip to push the stack out. I've never tried to install caps without a capping tool, but it may be possible.

Just turn the core upside down and using a small steel rod just punch the pins, spring and cap out, that is how it is designed to be de-cored.

Wayne

For sure that is the fastest and easiest way to get the pins out. A hobbyist might not want to purchase a decoder block. Also punching the pins out destroys the springs, so they're gonna have to be replaced after doing this.

Here's a catalog entry for the A1 version of the tools for the interested. I think I paid around 85 bucks for the decoder block, but if you're cheap and sort of handy, you could make your own.

Here's the icore tool page from an old A1 catalog for the curious.

[MatrixBlackRock]

For sure that is the fastest and easiest way to get the pins out. A hobbyist might not want to purchase a decoder block. Also punching the pins out destroys the springs, so they're gonna have to be replaced after doing this.

Here's a catalog entry for the A1 version of the tools for the interested. I think I paid around 85 bucks for the decoder block, but if you're cheap and sort of handy, you could make your own.

Here's the icore tool page from an old A1 catalog for the curious.

This is by far the easiest tool to use for that job.

http://www.clksupplies.com/products/int ... core-annex

Wayne

[tpark]

I really like the annex too - I think the construction of this tool is very good. I followed the warning to use a plastic or hide hammer, and mine has lasted for years.

[Tyler J. Thomas]

Did a write up on the math involved with SFICs for anyone interested.

[jeffmoss26]

saw it on linkedin first - another great writeup Tyler!