Sargent & Greenleaf Padlock

[mcm757207]

Only three disks? Doesn't seem particularly secure.

[poky13]

I really don't want to take it apart again it is a to get the locking ball back in. Maybe I can explain a little better. The plug that holds the cylinder in is threaded it is locked in with a roll pin or set pin, I don't know what you call them , but they are rolled tin, They are a lot softer then the housing is. I had to dill it out to get the plug out. I thought it might have been a Allen screw,but it wan't
If this did not help let me know and I will take it apart and take some more pictures OK!

[Jaakko]

That's fine, I think I got it Thank you for the info!

And for the security of it: Three detainer discs sure ain't secure.

[Squelchtone]

That's fine, I think I got it Thank you for the info!

And for the security of it: Three detainer discs sure ain't secure.

security by obscurity Jaakko, when this lock first came out in America it was such an "odd duck" (something strange) that nobody would even think of picking or manipulating it.

For those who have never seen one in the wild, I found a photo on Flickr of an S&G environmental padlock securing a railroad switch:

Large photo, suitable for wallpaper:
http://highsecurityconsulting.com/Locks/Sargent_Greenleaf_Environmental_railroad_switch_padlock.jpg

Enjoy!
Squelchtone

"necromancing your old threads since 2006"

[Evan]

That's fine, I think I got it Thank you for the info!

And for the security of it: Three detainer discs sure ain't secure.

security by obscurity Jaakko, when this lock first came out in America it was such an "odd duck" (something strange) that nobody would even think of picking or manipulating it.

For those who have never seen one in the wild, I found a photo on Flickr of an S&G environmental padlock securing a railroad switch:

Large photo, suitable for wallpaper:
http://highsecurityconsulting.com/Locks/Sargent_Greenleaf_Environmental_railroad_switch_padlock.jpg

Enjoy!
Squelchtone

"necromancing your old threads since 2006"

Hey everyone:

As far as Jaakko's comment that three discs isn't all that secure, how many of you have practiced picking such mechanisms affixed to the ground like in Squelchtone's provided picture -- better be quick, kneeling in that ballast gravel won't be fun for very long even if you bring knee pads...

These locks are pretty secure, even the 3 "disc" lock actually has 4 discs, the 4th disc (which could be located anywhere in the pack) operates the mechanism of the lock when all of the other discs are lined up properly after a certain amount of rotation...

3 disc S&G environmental locks are supplied with keys which have a round bow, 4 disc S&G environmental locks are supplied with keys which have a square bow...

Disclaimer: These are fairly easy to pick (especially when you are holding it free in your hand) once you know a few things about them, although I have never personally done it, there was for a time several years ago a YouTube video of someone picking one with a very basic and widely available picking tool and then reading the angles of the discs to make a working key using some plain old round bar stock with a washer brazed/welded onto the bow end... But details on exactly how to do that would tend to be for advanced discussion only...

~~ Evan

[thedragonsmith]

I have picked several of these on my yt channel, using a prybar. I guess picking instructions is in the "advanced" section, so I'll leave it at that. Some of these padlocks have a pre drilled hole to access the grub screw, some u gotta drill the access hole, others dont have the grub screw at all.