Tripple stacked True Position
Tripple stacked True Position
(OP)
I have a call into the design engineer but I wanted to see if anyone else has run across this.
I have a call out that is 3 True Positions stacked on top of each other. See attached.
I am familiar with the double stacked version, but I must admit I do not know what they are getting at with the 3rd.
They have gone far enough to designate both diameters as Datum -B- so is the third TP intended to be for concentricity between the 2 diameters?
Datums -D- and -J- are cylinders on the other 2 axis' that -B- is not on (if that helps any).
Please advise.
I have a call out that is 3 True Positions stacked on top of each other. See attached.
I am familiar with the double stacked version, but I must admit I do not know what they are getting at with the 3rd.
They have gone far enough to designate both diameters as Datum -B- so is the third TP intended to be for concentricity between the 2 diameters?
Datums -D- and -J- are cylinders on the other 2 axis' that -B- is not on (if that helps any).
Please advise.





RE: Tripple stacked True Position
Frank
RE: Tripple stacked True Position
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Tripple stacked True Position
I have no objections to triple stacking. The part must meet all specifications.
I do not understand the third specification. Testing the two bores for co-axiality looks impossible to me. Each bore is 2mm long! How are you going to find the centre-lines?
--
JHG
RE: Tripple stacked True Position
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Tripple stacked True Position
If I understand the drawing correctly, a dia .94444 gage pin won't go through the hole. There are two dia. (.908, .918) bores.
By the way, the nominal length of each bore is .324, meaning 8.2x mm.
RE: Tripple stacked True Position
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II