Just wanted to update you guys. I went with a 12” pulley on the fan shaft and a 3” variable pitch motor pulley(that was the smallest I could get locally). I tried my 1/2hp motor first. I opened the motor pulley about 3 turns. It was running about 7.8 amps. The motor does have a 1.25 SF, so...
Okay, that being said, does anyone have a 48” attic fan that happens to know pulley sizes and motor data? Or at least an educated guess to get me in the ballpark to start?
This may not be the correct forum for my thread, but I hope it is. I recently acquired a 48” attic fan that I intend to install in my barn. This is my problem. It was a bare fan. There isn’t a pulley on the fan shaft. Also, no motor. I have a couple of motors. I have a 1/2hp fan duty motor...
