Converting Schlage SC1 (5-pin) cylinder to accept SC4 (6-pin) key : Locksmith


I had a similar issue to this post by /u/dt_mt2014

I have a 6-pin Schlage key that I wanted to use in a 5-pin SC1 knob. However, the residential knob is too short to accept a 6-pin SC4 KiK cylinder, so a cylinder swap wasn’t possible. Likewise, I didn’t find much online when searching for alternate solutions.

However, it turns out that the blocking item for the longer key is simply the bottom center of the cylinder tailpiece.

So, with some careful filing of the tailpiece, the longer SC4 key can pass under the tailpiece and will protrude slightly beyond the back of the keyway, but it doesn’t protrude enough to extend beyond the plane of the tailcap.

Therefore, pinning the 5-pin KiK cylinder to the first 5 pins of the 6-pin SC4 key allows the lock to operate as normal with both a 5-pin and 6-pin key.

A picture to show the filing work on the tailpiece (from ~4 o’clock to 6 o’clock). ~20 mins with small triangle / half-moon files. It would have been faster if I were less cautious. 🙂

Leaving this here in case it helps someone in the future.



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I am converting a very old (100 y/o) solid wood door with a mortise lock to a cylinder lock. I would like to maintain the current center to center spacing of 3 5/8 if possible. I know the modern standard is 5 1/2 CTC. Is there any security/safety risk in sticking with the old spacing? : Locksmith


What are you trying to achieve with this conversion?

The chances of you finding the right amalgamation of plates to maintain that spacing and have it come out looking even halfway decent are, in my opinion, pretty slim.

Edit: I would hate to see you disrupt the appearance of what looks like a beautiful 100 year old door with a bunch of tacky wrap plates. I’m sure there’s better ways to achieve whatever it is you’re trying to do.



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Converting Abloy tailpiece to work with deadbolt


Hey guys, just a quick question to see if what I’m trying to do is possible without breaking the bank or having to purchase all new hardware.

Short version: Just bought a house, want to rekey the place, and I’ve got a couple of Abloy Disklock KIK cylinders that I wanted to put into the existing deadbolts. I can get the tail pieces to fit and work inside the door, turning the cylinder and extending or retracting the bolt, but it doesn’t quite work as intended because the tailpiece is NOT a floating tailpiece. It’s a fixed tailpiece, and I can’t see a way to get a floating tailpiece on there, which is what the deadbolt needs in order to work with a thumbturn.

At least, that’s the extent of my knowledge on this subject. Could anyone help with this? Is what I’m wanting to do possible? I’d love to have these Abloys work properly inside my KIK deadbolt setup (schlage, btw, but I have kwikset hardware too if that matters), and if there’s any part that I don’t know of that would help, please let me know.

Maybe be wishful thinking, but thanks anyways!



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Converting Tumbler Lock To Keypad?


Converting Tumbler Lock To Keypad?

Hey Locksmiths,

Curious question. Is it possible to convert a tumbler lock like this to a keypad system?

edit: after more research, it looks like an electronic cam lock is what I'm after

https://preview.redd.it/ccmt3kxp9hw41.jpg?width=1500&format=pjpg&auto=webp&s=3568d804edc9e36aa0c2c9aca4cfc251d42b9621

https://preview.redd.it/bry29kxp9hw41.png?width=266&format=png&auto=webp&s=6ad2b3f208c4b9de1d0e2e826ac00644e7c72875

submitted by /u/Kegath
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