Specifications

The Control Key
In Photograph 4, below the
assembled core and housing, is a
control key and an operating key.
The control key is on top. This
Medeco I-Core has six pin chambers,
but the last (sixth) pin chamber is
empty. That is why both keys have
only five cuts each. Compare the
control key with the operating key.
You may notice that, except for the
third and fourth cuts from the
shoulder, the other three cuts are
the same on both keys. The key cuts
for the control key are as follows:
34123. The cuts for the operating key
are: 34453. Although it will be more
obvious later, the cut angles on both
keys must always match. The view of
the keys does not reveal the cut
angles, but they just happen to be
LRCRC. That applies to both control
and operating keys.
In a Best-style core, the control
sleeve which creates a second shear
line runs the full length of the core.
Because of that, a Best control key
will not normally share cuts in
common with an operating key.
Since Medeco cores have the control
sleeve in line with only the third and
fourth pin chambers, only those two
cut positions will have different cut
depths than the operating key (or
TMK if master keyed). All the other
cuts are common to both keys. A five
cut key will have cuts common in
positions 1, 2 and 5 (bow to tip). A
six cut key will have common cuts in
positions 1, 2, 5 and 6.
The Control Sleeve
Illustration 1, shows a front view
of the Medeco IC cylinder control
sleeve. At the top right of the control
sleeve is where the locking lug is
located. That is what keeps a
Medeco I-Core from coming out of a
housing, unles, of course, a control
key is used. The space at the top of
the control sleeve (identified by the
arrows) is the thickness of three
standard Medeco depth increments.
An original Medeco with six depths
has an increment of .030” between
August 1996 • 19
4. Below the assembled core
and housing, is a control key and
an operating key.
Illustration 1. A front view of the
Medeco IC cylinder control
sleeve.
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