More classic computer on topic....

See below: On Mon, Apr 25, 2011 at 7:22 AM, Ethan Dicks <ethan.dicks at gmail.com> wrote: > On Mon, Apr 25, 2011 at 8:44 AM, Pete Turnbull <pete at dunnington.plus.com> wrote: >> On 25/04/2011 04:37, Vincent Slyngstad wrote: >> Here's what I got from two original XX2247 keys... >> >> The cut depths, clockwise from the first position, looking into the open >> end with the key at the "twelve 0'clock" position are: >> >> Key 1 Key 1 Key 2 Key 2 >> >> 0.0770" 1.94mm 0.0785" 1.95mm >> 0.0150" 0.37mm 0.0155" 0.39mm >> 0.1055" 2.68mm 0.1070" 2.72mm >> 0.0435" 1.13mm 0.0455" 1.13mm >> 0.1075" 2.72mm 0.1085" 2.74mm >> 0.0780" 1.96mm 0.0785" 1.98mm >> 0.1075" 2.72mm 0.1095" 2.77mm > . > . > . >> I'm not quite sure what this says about cutting tolerances or what multiple >> the depths of cut are. > > Not sure about tolerances (my brother is a locksmith but I'm not), but > according to... > > http://www.locksafesystems.com/depth_and_space.htm#Chicago_Tubular_Space_an… > > The depths by number are: > > 1 - 0.0155" > 2 - 0.0310" > 3 - 0.0465" > 4 - 0.0620" > 5 - 0.0775" > 6 - 0.093" > 7 - 0.1085" > 8 - 0.1240" > > Meaning that the XX2247 key would have depths (in the order you > describe) of 5-1-7-3-7-5-7 > > A locksmith set up for ACE cutting would have the code book to convert > the serial number into the depth sequence, so the number on the key is > the important datum. Knowing the numeric depths is handy when you are > pinning a lock so you know which bin to pull pins from. > -ethan