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Masterlock '911'

Information about locks themselves. Questions, tips and lock diagram information should be posted here.

Moderators: zeke79, keysman

Masterlock '911'

Postby loansindi » Thu Dec 17, 2009 8:15 pm

So i picked up a masterlock 'contracter' grade padlock tonight. The package touted it as rekeyable (having OVER 9000 combinations), so I figured it'd be a good experience in lock disassembly, for $15.

I took it apart (managing to destroy one of the springs in the process. Learn by doing, right?) and discovered that it contained not one or two, but five spool pins. I had thought the lock acted very strange when I tried to pick it. (To date I've only picked inexpensive masterlock padlocks.)

Included are a couple of photos.

Image

Image

This experience has taught me a whole lot about the internal mechanics of locks (things that I only knew based on reading, to this point). For a very reasonable price (for $15, I wouldn't be broken up about breaking/damaging it, you know) i've gotten a great learning tool.
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Re: Masterlock '911'

Postby pjzstones » Thu Dec 17, 2009 10:55 pm

does it have a sixth chamber? i have a proseries 6125 and it's got 6 chambers but only 5 were filled. they too were all spools which makes it easier to pick in my opinion. so i added pins to the empty chamber and replaced two spools with standards.
All truths are easy to understand once they are discovered; the point is to discover them
Galileo Galilei
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Re: Masterlock '911'

Postby loansindi » Fri Dec 18, 2009 12:50 am

It does have a sixth chamber. I got up to three spools this morning and that was hella easy to pick. I'm gonna eat some lunch and pin it back up to five and see if I can do it now that I know what exactly I'm feeling.
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Re: Masterlock '911'

Postby lock2006 » Sat Dec 19, 2009 12:11 am

The Masterlock 911 i got it has only 2 spool pins :)
also i have one Master 6621 and no spool pins at all
this master 6621 has 6 pins
so i have to replace all regular pins with spool pins.
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Re: Masterlock '911'

Postby loansindi » Sat Dec 19, 2009 12:14 am

Like unlisted said, all spools makes for a really easily opened lock. Definitely interesting, and when I pick up more locks I'll have to try it with some regular pins.
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Re: Masterlock '911'

Postby Aldenrenfrid » Tue May 29, 2012 12:54 pm

Sorry to resurrect a dead thread, but i'm dealing with an issue one one of these.
Got it in a box lot from the buy & sell area. Its a great lock, good condition and all and the key works great. But it's one of 4 padlocks I haven't been able to open yet, (the other 3 being combo locks) I quickly figured out that it was all spooled (and later confirmed that as you'll see) but it felt... just weird. Normally with spools I will get the indicative counter rotation on applying pressure, these felt solid as anything, and even with feather light pressure I was scared I'd break my pick every time I put enough pressure on it to move it past the 'hard stop' to set them. I worked on it off and on for 3 days now and tonight a solid 2 hours of strange and not normal feeling before I finally gave up and took the lock apart. This is what I found:
Image
Now, I've seen these groves milled in the spring/pin housing before, but not typically on production locks.
Whats more, if you'll notice the groove is deeper, and thus wider near the plug. Wide enough for a pin to catch there. As well as the springs and pins catching on the rough inner lip of the cut. It seems to make it neigh impossible for me to pick as its always hitting the casing and stopping rather then setting. For some reason it dosent do this with the key. Am I just being a unskilled whiner with my ego bruised :lol: or is this unusual? And in either case, how would I go about picking it?
Many thanks,
-Alden
“Do nothing that is of no use”
“Perceive that which cannot be seen with the eye.”
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