How to key Medeco IC core

[DIY Dave]

I'm looking for directions on how to key up a medeco ic core. Right now I have the core, working control key, and a couple medeco set up keys that fit the keyway, but can't figure out how to key it to match the keys. Any help would be appreciated. BTW this is a full size medeco core not a sfic medeco keymark core.

Medeco LFIC.jpg

[GWiens2001]

The control key will give you the angle of rotation and fore/aft locations. The numbers 1, 2, 5 and 6 bittings will be the same. You only need to change the heights/depths of the 3 and 4 bittings, which are the only bittings used by the control key.

Gordon

[keymaster1053]

In case you didn't get specifics yet, as gordon said, chambers 1,2,5,6 can/usually are keyed identically with same angles and cuts. Chambers 3 and 4 should be keyed to the operating key only, unlike SFIC's you don't use extra pins for the control key. The control key cuts in chambers 3 and 4 must be three cuts shallower than those on the operating key. So, if your operating key is 437655, then your control key is 434355. All angles are the same for both keys. With this rule, you CANNOT have an operating key with either a one, two or three cut in chambers three and four.
As stated above chambers 1,2,5,6 are usually keyed identically, but they don't have to be. if they are not, THEN you must key those chambers with master wafers to accomidate both keys, remembering to only pin chambers three and four to the operating key.
Hope this clears it up for you!
Jim
keymaster1053

[DIY Dave]

Thanks for the help guys!

In case you didn't get specifics yet, as gordon said, chambers 1,2,5,6 can/usually are keyed identically with same angles and cuts. Chambers 3 and 4 should be keyed to the operating key only, unlike SFIC's you don't use extra pins for the control key. The control key cuts in chambers 3 and 4 must be three cuts shallower than those on the operating key. So, if your operating key is 437655, then your control key is 434355. All angles are the same for both keys. With this rule, you CANNOT have an operating key with either a one, two or three cut in chambers three and four.
As stated above chambers 1,2,5,6 are usually keyed identically, but they don't have to be. if they are not, THEN you must key those chambers with master wafers to accomidate both keys, remembering to only pin chambers three and four to the operating key.
Hope this clears it up for you!
Jim
keymaster1053

If you had an ic core with an operating key only (and blanks accessible), you could most likely cut a working control key or vice versa?