From memory it is a 1/3 or a 1/2 hp. Plenty enough for the application. The drum is made up from 3/4" MDF board precut in circles and glued together and on to the 5/8" drive shaft. I used an 1" thick piece of aluminum stock block with sand paper glued on it to run through the machine to true the drum while it was turning. I made sure it was very accurate and square with the feed table.
This was pretty much a made with scraps machine that I am pleased with. Now I need a bit more time to use it.