FAQ  •  My feedback  •  Feedback
UKLockpickers.co.uk Lockpicking supplies such as Lockpicks, tools, and more! COMMANDOLOCK.COM Military grade padlock systems lockpickshop.com A source for lockpicking supplies such as lockpicks, locksmith tools, and more!

S&G 6804 7-lever safe lock (many pics)

<<

madsamurai

User avatar

Familiar Face

Posts: 179

Joined: Wed Jan 04, 2017 4:13 am

Location: Germantown, Ohio

Post Tue Feb 28, 2017 5:16 pm

S&G 6804 7-lever safe lock (many pics)

Picked up a new Sargent & Greenleaf 6804, and of course I had to take it apart... I was especially curious to see how they could make a lever lock with a changeable combination, and wanted to see how it all works. Thought some of you might be curious as well, so I took pictures as I went along to share.
The way it works, is you put the key in and turn to the open position, then loosen a screw that is revealed on the back which allows you to turn the key further to 180º and remove it, put in a new key and turn back to the stop position, tighten the screw, and then remove the new key which now opens the lock. Sounds like it would require some pretty complicated mechanics to allow levers to be changed, but it's actually a very simple design...

Here's the lock, key hole on the front, and the back showing the revealed change screw (in the open position. it is hidden when locked.)
Image Image

Overview of the inside with the lid removed, you can see the lever stack on the right side and what I'm going to call the Post Stack on the left, as it is not a traditional solid post like I've seen in other lever locks.
Image

Closer view of the working parts...
Image

From this next shot, you can see clearly the post stack, which is how this lock is able to be changed to a new key. When the change screw is loosened, it allows the post wafers to slide independently, then is locked back down to create the new combination. All of the levers are actually exactly the same, it's just the wafers in the post itself that are changed. The top of the screw is visible in the small metal retaining block between two static alignment pins.
Image

These next two give a better view of the anti-picking protection... good number of false gates, especially if you overset, and a notch in the post wafers that will catch the nubs in-between the false gates. Looks like a challenging pick...
Image Image

Here's with the levers removed, showing the bolt and the trunnion underneath, in closed and open position
Image Image

Here's with the bolt removed
Image

Back of the bolt, with the change screw. Loosening the screw not only releases the post wafers, but also creates a gap under the screw head that allows the bolt to move just a little further and lets the key move to the 180º change position.
Image

And here are the levers all laid out... they're all exactly the same.
Image

An interesting note about the key... I noticed there are a lot more bitting cuts than there should be for only 7 levers. Looking close, I noticed the bitting cuts toward the tip are cast, not cut. Turns out they're completely decorative... The actual bitting is just the first seven cuts, the additional bitting does absolutely nothing... it could just as well not be there at all. There's no internal warding or anything to explain it. The only thing I can figure is it's there to make the key look more complex/secure to customers...
Image


So there you have it... much simpler than I expected, but still a pretty smart solution to make levers rekeyable. Hope you enjoyed :)
<<

Patrick Star

User avatar

Familiar Face

Posts: 233

Joined: Sun Apr 10, 2016 9:40 pm

Location: Sweden

Post Tue Feb 28, 2017 6:05 pm

Re: S&G 6804 7-lever safe lock (many pics)

Perhaps dumb question, but isn't the extra part of the key what actually tensions the lock?
<<

madsamurai

User avatar

Familiar Face

Posts: 179

Joined: Wed Jan 04, 2017 4:13 am

Location: Germantown, Ohio

Post Tue Feb 28, 2017 6:18 pm

Re: S&G 6804 7-lever safe lock (many pics)

Yes, just the very end tho... my point was the extra cuts aren't necessary or functional in any way... everything to the right of my green bracket could be just zero-bitted and it would work the same. It's possible it has some use in the 6805, which is the non-key-retaining version of this lock and uses the same blank.
<<

ratlock

User avatar

Familiar Face

Posts: 206

Joined: Sat May 07, 2016 8:41 am

Location: Scotland

Post Sat Apr 01, 2017 7:20 pm

Re: S&G 6804 7-lever safe lock (many pics)

Thanks for posting the picks
<<

Oldfast

User avatar

OldddffAASSTT the Spin Master Extraordinaire and American Lock Slayer
OldddffAASSTT the Spin Master Extraordinaire and American Lock Slayer

Posts: 4019

Joined: Thu Mar 31, 2011 3:16 pm

Location: Michigan

Post Tue Apr 04, 2017 10:31 pm

Re: S&G 6804 7-lever safe lock (many pics)

Great break-down. And very impressive on the tool & pick HERE
No doubt exciting for you - making the tool & successful pick!
" Enjoy the journey AS MUCH as the destination."
<<

madsamurai

User avatar

Familiar Face

Posts: 179

Joined: Wed Jan 04, 2017 4:13 am

Location: Germantown, Ohio

Post Wed Apr 05, 2017 12:53 am

Re: S&G 6804 7-lever safe lock (many pics)

Oldfast wrote:Great break-down. And very impressive on the tool & pick HERE
No doubt exciting for you - making the tool & successful pick!

Thanks, Oldfast! I appreciate the compliment. It was a lot of fun making that pick. I was an apprentice machinist/moldmaker back in the day, but hadn't worked with metals for years so it was fun to revisit those skills. It was surprising to me how precise I could still be with a hand file. Soldering/brazing metals is a new thing, tho, and I kinda went overkill at first with that... so wasted some brass there, but got it figured out so now it's pretty easy.
It's a different sort of satisfaction when you pick a lock with something you've made yourself. It's a much more intimate process than just buying a pick and picking... It's the same for me with fly fishing - a whole different level of intimacy when you start tying your own flies and fooling trout with them :) I feel like I really know this lock now. And I need to go fishing...

Return to Safes, Strongboxes & Combination Locks

Who is online

Users browsing this forum: CommonCrawl [Bot]

Don't forget to visit our sponsors for all of your lockpicking needs!
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Grop
"CA Black" theme designed by stsoftware