Quote:
Originally Posted by Ty Tremblay
Sorry about that. I had realized that my belt model wasn't thick enough so I changed it and then realized that I had about .003" of space between the belt and the "roof" of the tube. I found 23T GT3 pulley stock on SDP/SI and decided to make that change since it gives me enough roof clearance (.043") and still gives me room for the bearing counterbore.
|
You have nothing to worry about with flangeless pulleys. 2791 has never had flanges on the pulleys and has never had a problem at all. This is one of the benefits of belt-in-tube.
As for GT vs HTD belts - the biggest thing to keep in mind is availability of particular belt lengths. Sourcing GT2 and GT3 belts can be difficult, but it is extremely easy to get HTD belting. I have heard that the HTD's deeper tooth profile is supposed to be better for reversing loads / ratcheting prevention as well, but I have no data to back this up.
Quote:
Originally Posted by nuclearnerd
I'm also concerned about not having rotating flanges on at least the center pulley. My old team used the Vex belt upgrade on the AM14U chassis in 2014. It worked for the season, but the belts showed some pretty hairy wear, as the sides of the two belts rubbed past each other on the common, center pulley. |
If belts are properly aligned and tensioned, this just shouldn't happen. When the belts are on the pulley, they aren't moving relative to each other at all. I've never run into significant problems with a setup like this.