Last week my new Warp 9 arrived!
The Warp 9 have some improvements over my FB1-4001a. First it has larger brushes that allow for more current handling, and it has a better fan for cooling. It also has 1/2" terminals to handle more current.
Now I have been having a slight problem with my coupling. I designed it to use H bushings and I ordered up 4 new H bushings and when they arrived I found they had slightly changed! Their diameter was 0.005" smaller which meant they didn't lock onto the shaft when I tried to install the coupling.
So after a few days of research I found out that there is a replacement to the H bushing, the QT bushing. It has a slightly different design of having a single split down the opposite side of the key way. It was also the correct dimensions and it installed perfectly.