FAQ  •  Register  •  Login
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!

Making A Key For A Junkunc Chain Lock

<<

GWiens2001

User avatar

Lock-Goblin-Gordon
Lock-Goblin-Gordon

Posts: 3795

Joined: Thu Oct 25, 2012 9:05 pm

Location: Arizona, United States

Post Tue Nov 10, 2015 9:38 pm

Making A Key For A Junkunc Chain Lock

A friend has a Junkunc chain lock, but no key. So took the time to make one. This is the lock.

Image

Not exactly a large lock. But not the smallest Junkunc. Here it is with a United States quarter and a 1 Euro coin, so those on both sides of the pond have a size reference.

Image

This lock looks similar to the 'wavy' key dual-sided wafer locks that have been around for quite a while. But this is not the same. First of all, there are no springs. The wafers are also a bit further apart. Unfortunately, don't know if this lock can be taken apart. (If you know, go ahead and post how it is done here, please).

These locks can not really be impressioned with an entire blank, since the key goes into a window inside the wafer. So you need to know what the key looks like if you can't get it apart. First step would be to pick the lock. (Not exactly rocket science picking these). Raimundo's Bogota set came out of my wallet, and a few seconds later, the lock was open.

Image

Image

Now that the plug is turned, the wafers are held in place, and will not move up or down. I tried to feel the heights with a pick and tried to file a key from the estimate of how the key would work, and guess what!?!? It failed. :( Oh well, guess we got to do this the hard way. :?

With the plug turned, even the correct key will not go into the lock. So took a small flat steel key and worked on one half of the key. Cut the key blank height down until it fits in one side of the keyway.

Image

Now cut a bevel on the side where the center warding of the keyway is located, on the side of the key that faces away from the wafers you are trying to copy.

Image

Image

Now that you have the bevel cut, put the key into the lock at an angle so it fits over the warding, reaching in only as far as the first wafer so you know you have the height and angle of the bevel right.

Image

Then turn it to be sure it can make the turn to fit flush in the keyway.

Image

OK, that works. Now put the key full depth in the keyway. (Minds out of the gutter, guys).

Image

Now if you turn the key, even though it looks like it goes all the way, it won't.

Image

Why not? Because the wafers are held in place since the plug is turned a bit. NOW, you can impression one side of the lock. Ink the blade of the key, insert at an angle, turn it until it is stopped by the wafers, then jiggle it lightly. Pull it out and read the marks.

Image

File where you see the marks.

Image

Re-ink the blade.

Image

Repeat until you don't get marks.

Image

Again, this lock does not have springs. So hold the lock so the side you are trying to impression is facing up, turn the plug back to the locked position, insert the key, and tap the side of the lock a little to allow the wafers to drop against the key.

Image

Apply turning pressure, and...

Image

Image

No, that was not my first attempt with the 'half key'. But that is the half key working.

Now, you do the same thing on the other side, right? Nope!

Copy the half key onto the correct half of the real blank.

Image

Then use the half key facing the same direction as on the first side. Then it is a pattern for the mirror image.

Image

Image

Image

Image

Image

Hurray!

Now you try it!

Gordon
Just when you think you've learned it all, that is when you find you haven't learned anything yet.
<<

macgng

User avatar

Contributor / I Fought Tooth and Nail to Acquire BO...
Contributor / I Fought Tooth and Nail to Acquire BO...

Posts: 991

Joined: Sat Jan 22, 2011 9:38 pm

Location: MD, USA

Post Tue Nov 10, 2015 9:42 pm

Re: Making A Key For A Junkunc Chain Lock

use a half key, flip it around and copy the mirror image! why didn't i think of that!!!! genius! nice job
Nibbler: The poop-eradication is but one aspect of your importance.
<<

GWiens2001

User avatar

Lock-Goblin-Gordon
Lock-Goblin-Gordon

Posts: 3795

Joined: Thu Oct 25, 2012 9:05 pm

Location: Arizona, United States

Post Tue Nov 10, 2015 9:45 pm

Re: Making A Key For A Junkunc Chain Lock

Don't flip it! Then the two sides are the same, and the key won't fit into the lock. Just slide it down. ;)

Gordon
Just when you think you've learned it all, that is when you find you haven't learned anything yet.
<<

Anarchy_won

User avatar

Active Member

Posts: 686

Joined: Sun Oct 27, 2013 11:27 am

Location: Ontario, Canada

Post Tue Nov 10, 2015 9:48 pm

Re: Making A Key For A Junkunc Chain Lock

Great write up as always Gordon.
(17:44:28) HAL 9000 Sez: LockSport is full of children who throw fits because low priced low security products sold in discount department stores do not meet their arbitrary expectations.
<<

Papa Gleb

User avatar

Contributor
Contributor

Posts: 1108

Joined: Fri Sep 05, 2014 11:10 am

Location: Brooklyn, NY

Post Wed Nov 11, 2015 8:49 am

Re: Making A Key For A Junkunc Chain Lock

This guy Gordon never stops amazing. I had a nice long battle with one of these double wafer locks and cracked my head thinking how to copy that onto a key until I realized I can buy a new core with keys for $5 but thats never the same as making a working key. Gordon, thanks for this write up mate.
<<

jeffmoss26

User avatar

Sargent Mossberg
Sargent Mossberg

Posts: 2161

Joined: Sun Apr 18, 2010 8:21 pm

Location: Cleveland, OH

Post Wed Nov 11, 2015 11:02 am

Re: Making A Key For A Junkunc Chain Lock

You are a legend!!
femurat: They're called restricted for a reason...
Innerpicked: The more keys you carry, the more important you look
GWiens2001: Great video! Learned a lot about what fun can be had with a forklift and a chainsaw.
pmaxey83: but i first have to submit the proper forms for a new hobby to my wife
<<

MBI

User avatar

Site Owner

Posts: 1545

Joined: Thu Apr 03, 2008 9:25 pm

Location: Utah, USA

Post Wed Nov 11, 2015 1:23 pm

Re: Making A Key For A Junkunc Chain Lock

Nice work Gordon.
That's not exactly a "typical" lock impressioning job.
I am... impressed!

Thanks for documenting it so well and taking such great pics.
<<

spuds

User avatar

Familiar Face

Posts: 205

Joined: Sun Jun 14, 2015 11:04 am

Location: New Jersey

Post Sun Mar 13, 2016 9:12 pm

Re: Making A Key For A Junkunc Chain Lock

Nice Gordon
Even Duct tape can't fix stupid But it can muffle the sound ! ;-)
Jim
<<

GWiens2001

User avatar

Lock-Goblin-Gordon
Lock-Goblin-Gordon

Posts: 3795

Joined: Thu Oct 25, 2012 9:05 pm

Location: Arizona, United States

Post Wed Dec 25, 2019 11:21 am

Re: Making A Key For A Junkunc Chain Lock

I never updated this post, but that lock is now in my collection. :D

Gordon
Just when you think you've learned it all, that is when you find you haven't learned anything yet.
<<

namggey

User avatar

Familiar Face

Posts: 26

Joined: Mon Dec 09, 2019 5:04 pm

Location: Maine U.S.A

Post Thu Dec 26, 2019 2:47 pm

Re: Making A Key For A Junkunc Chain Lock

Great series of pictures!
<<

gnarus8429

User avatar

Contributor
Contributor

Posts: 231

Joined: Fri Jan 13, 2012 8:23 am

Location: Kentucky, US

Post Mon Dec 30, 2019 8:05 am

Re: Making A Key For A Junkunc Chain Lock

Very nice.
I have no special talent. I am only passionately curious.
-Albert Einstein

Return to This Old (or unusual) Lock

Who is online

Users browsing this forum: No registered users

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