On 11/26/2019 2:40 PM, Dennis Boone via cctalk wrote:
For Chicago/ACE, cut depths from 1 to 8 respectively are:
0.0155" 0.0310" 0.0465" 0.0620" 0.0775" 0.093" 0.1085" 0.1240"
For Fort/GEM, depths are numbered 0 to 7, but the measurements are the
same as for Chicago/ACE.
Looking into the end of the key, pin numbering is:
Chicago: #1 at eleven o'clock, proceed counterclockwise to #7 at one
o'clock.
I found another reference. different numbers slightly.
https://www.lockpicking101.com/viewtopic.php?f=9&t=42870
There are a couple different numbering systems. The pin lengths are the
same, but the number
given to that particular length is different. Fort Lock, such as the Gem
and Apex locks go clockwise
if you are looking down the barrel of the key from the tip. The Chicago
Ace style goes counter-clockwise.
Fort Lock numbers them from 1-8 while Chicago goes 0-7.
Fort Lock/Chicago Ace/Depth of cut
1----------0----------.016"
2----------1----------.032"
3----------2----------.048"
4----------3----------.064"
5----------4----------.080"
6----------5----------.096"
7----------6----------.112"
8----------7----------.128"
What I have measured so far. This starts with the index up, first slot
to the right, going CCW.
Index pin meas value
depth
1.
.0460 3
2.
.0770 5
3.
.0770 5
4.
.1090 7
5.
.0460 3
6.
.0795 5
7.
.1080 7
Here are photos of the key.
https://imgur.com/a/yCPwaR0
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