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™ Medeco question

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awol70

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Post Sat Mar 07, 2009 6:15 pm

™ Medeco question

ok,so we know that if you pick a medeco mortise cylinder CW you have to pick the pins to the shearline,then rotate each pin so the sidebar slots align with the sidebar teeth,allowing plug rotation.
we also know that if you pick the same lock CCW, you must rotate the pins first ,then
pick the pins to the shearline..
my question is this:is it possible to mistakenly make a reassembly error and install the sidebar
upside down,and if so would this affect the established cw-ccw known rules?
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jruther2

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Post Sun Mar 08, 2009 12:25 am

Re: ™ Medeco question

The sidebar is asymmetrical. When the sidebar is inserted upside down the protrusion that catches in the groove in the cylinder is more toward the top of the keyway instead of toward the bottom. When the plug is placed back in the cylinder with an upside down sidebar the protrusion won't line up with the groove at the same position where the key pins and drivers line up. The pin stacks always line up when the lock is in the twelve o'clock position. When the sidebar is upside down it lines up with its groove in the cylinder when the plug is somewhere between the twelve thirty and one thirty position which is just enough to keep the pin stacks from lining up. I think this should lead to a jammed lock that couldn't even allow key insertion since the only way for the plug to be at twelve o'clock would be for the sidebar to be fully engaged which would mean the pins won't rotate. As far as picking goes, if the plug is in and the lock is in the locked (twelve o'clock) position then the sidebar is set and all that is left is setting pins to the shear line.

There was no good way to take pictures to really show what I have been trying to say. For a better idea, take all the screws, pins, and springs out of your cylinder put the sidebar in upside down, re-insert the plug, and look down through the screw holes to see what I am talking about.

Disclaimer: I have been babysitting both of my sick daughters while my wife grocery shopped today. It is very late, I am very tired, and this is actually the second long reply I have typed up. The first one was very nice with good pictures, however, it was VERY incorrect. Upon a second look, this is my best thoughts on the subject at this time. Let me know what you think.
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ToolyMcgee

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Post Sun Mar 08, 2009 2:24 pm

Re: ™ Medeco question

Upside down sidebar jams the lock. I've done it, but was lucky enough to only have half the stacks inside and enough of the plug left out that I could depress the sidebar with my finger. Even still it was not easy. Maybe the only reason it was possible is because all the drivers were mushrooms and allowed for a little extra plug rotation for the sidebar to line up, but like I said it took alot of pressure to make it work.

Jruther's explanation sounds good. When it happened to me and I was frantically analysize the problem my thoughts ran along the same line. It seems to me that the way to reverse the picking directions is to manufactor the sidebar on the other side. It makes an assa twin pick reverse, so I assume it would do the same to another sidebar lock even though the mechanisms that lock the sidebars are entirely different.

-Tooly
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awol70

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Post Sun Mar 08, 2009 2:30 pm

Re: ™ Medeco question

ToolyMcgee wrote:Upside down sidebar jams the lock. I've done it, but was lucky enough to only have half the stacks inside and enough of the plug left out that I could depress the sidebar with my finger. Even still it was not easy. Maybe the only reason it was possible is because all the drivers were mushrooms and allowed for a little extra plug rotation for the sidebar to line up, but like I said it took alot of pressure to make it work.

Jruther's explanation sounds good. When it happened to me and I was frantically analysize the problem my thoughts ran along the same line. It seems to me that the way to reverse the picking directions is to manufactor the sidebar on the other side. It makes an assa twin pick reverse, so I assume it would do the same to another sidebar lock even though the mechanisms that lock the sidebars are entirely different.

-Tooly

thanks, guys...
that clears it all up for me.
kinda sorta similar event took place here...
ended up losing the two sidebar springs in the carpet...ARRRGHH
anyway...i found them...well, my girl found them for me...=)
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.45cal

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Post Sun Mar 08, 2009 7:17 pm

Re: ™ Medeco question

Is there anything girls can't do?
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clodester

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Post Tue May 12, 2009 4:22 am

Re: ™ Medeco question

pee standing up, and retain dignity
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awol70

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Post Tue May 12, 2009 8:53 am

Re: ™ Medeco question

clodester wrote:pee standing up, and retain dignity

:D :D (HAHA)
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