I TAKE ONE 3-D MODEL OF PULLEY WITH GT2 PROFILE FROM SDP/SI WEB PAGE ,AFTER OPEN FILE AND CHECKED I SAW NOT CONFORMITY WITH GT2 PATENT AND VERY DIFFERENT BETWEEN TWO PROFILE,NO GOOD FOR MANUFACTURING.!!! PLEASE EXPLAIN ONE PERSON.!!
First off, please turn off the caps lock. Second, in general, you should not expect manufacturing drawings from any of the suppliers. You should be glad they include any teeth at all. For the most part, any CAD you download from a supplier will be a “customer” CAD file, meaning it will have the necessary geometry that recreates the interfaces. That includes files not only from SDP/SI, but FRC suppliers like AndyMark and Vex. In general, this is sufficient for designing things that use those components. They have to balance service provided to the customer versus protecting intellectual property. If you were provided with the manufacturing level CAD, then it would be trivial for anyone to take those and start manufacturing those parts themselves.
The actual tooth profile is not hard to work out. You can CAD a single tooth correctly and then create a pattern to make the remaining teeth. This also allows you to have any custom drive center that way. If 3d printing, having your own CAD allows you to adjust the drawing for the variations in the final printing geometry. (Ours shrinks a bit when cooled).
WE HAVE ORDERED PULLEYS FROM THEM BEFORE, AND WERE OK ON THE PROFILE! 192 ALSO USES THEIR PULLEYS WITHOUT ISSUES, PERHAPS YOU COULD CONTACT THEM.
SOMETIMES WHEN I OPEN CAD FILES FROM SDP-SI, THE TOOTH PROFILES LOOK MESSED UP OR PULLEYS ARE MISSING TEETH; IT’S NOTHING TO WORRY ABOUT.