Does NX 7.5/8 has any toolbox (e.g to gears and pinion) like in solidworks?
go to start in windows
right click on my computer
click on pro properties in right click menu
under system properties advanced tab click on "environment variable"
click on new
add new variable as UGII_COUNTRY = prc as shown in figure then click ok and again ok
when you open nx you get this GC toolkit in your menu bar.
this is what it does