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Question about Corbin cylinder

Having read the FAQ's you are still unfulfilled and seek more enlightenment, so post your general lock picking questions here.
Forum rules
Do not post safe related questions in this sub forum! Post them in This Old Safe

The sub forum you are currently in is for asking Beginner Hobby Lock Picking questions only.

Question about Corbin cylinder

Postby pinsetter » 24 Jul 2006 9:51

I just received some locks I bought from e-bay, and in the lot were 2 Corbin cylinders. I have never seen locks pinned like these.
The locks are both 5 pin locks and are pinned as follows:
All driver pins are spools.
The back 3 key pins are normal pins.
The front two key pin stacks contain a master wafer and a ball bearing. The ball bearing is what makes contact with the key and the master wafer rides on top of the ball.

Is the use of this ball normal? I've never seen it before. The locks are both very difficult to pick. Whoever keyed them also pinned them high/low. These are some of the best practice cylinders I've gotten lately.
pinsetter
 
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Location: Bedford, Indiana USA

Postby UWSDWF » 24 Jul 2006 9:55

Pictures
And preferably a pic of the key
Image
DISCLAIMER:repeating anything written in the above post may result in dismemberment,arrest,drug and/or alcohol use,scars,injury,death, and midget obsession.
UWSDWF
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Postby pinsetter » 24 Jul 2006 10:22

I will not be able to post any pics until tomorrow or later. My camera is still at my dad's house.

I'll try to get it tonight.
pinsetter
 
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Joined: 3 Apr 2006 21:40
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Postby Octillion » 24 Jul 2006 15:01

The balls are to reduce wear. The front two pins receive the most wear, so that is where they are placed. Otherwise, operation is the same as any other basic pin tumbler.
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Postby pinsetter » 24 Jul 2006 15:11

Cool! I can buy that explanation. Do they come from the factory like this or has this been custom pinned? I've just never seen a factory lock combinated like this before. I bought these and 12 other cylinders from a person who claimed to be a retiring lockie. All 14 cylinders that I bought are keyed to be difficult picks, and several are full of spool pins. It was an excellent batch of practice cylinders as all were Yale, Schlage, Sargent, Corbin, and Russwin except for 2.
pinsetter
 
Posts: 404
Joined: 3 Apr 2006 21:40
Location: Bedford, Indiana USA

Postby pinsetter » 26 Jul 2006 10:03

Something else I noticed on these Corbin cylinders:

The plug is either machined flat on top or has been modified by grinding or sanding a flat top on it. What I'm saying is, that where the pin chambers are in the plug, they are drilled into a flat machining. In another thread, raimundo was talking about beveled pins creating a larger shear line, and it seems that this would do the same thing. This lock is very hard to pick though.

I'm wondering if someone may have modified this plug or if it was manufactured that way? I'll take some pictures of this lock tonight since it has a lot of stuff I've never seen before.

Has anyone seen plugs made like this from the factory?
pinsetter
 
Posts: 404
Joined: 3 Apr 2006 21:40
Location: Bedford, Indiana USA


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