I've used a few of these style power feeds over the years, including the old school American brands and I can say they all are pretty similar in function with variations in quality. I bought a couple of the ALSGS branded ones fairly recently and I had a failure almost instantly on one of them (stripped plastic gear inside it). The other gives me fits and starts because it was assembled poorly and I had to dismantle and repair it. This Vevor one worked smooth right out of the box. My only complaint is that the included plastic nut to hold the dial in place is literal trash (it was too large for the threads and stripped instantly), and the old dial nut from my machine would not fit without massaging even though it is a metric thread of presumably the correct size. As others have said, some work may need to be done to the woodruff key and sizing of the bore to make this gear fit. Once set up it's worked flawlessly though.
arlen wilson 
