Tyson, Man I couldn't tell you. I have never had to plane anything with too much thickness. If I remember correctly one time a couple of guys tried to ram an 8X8X14 through the sob. It was a funny sight to see. They are trying to plane this TIMBER and the planer is sliding across the shop floor......... I think it probably planes at least 6" maybe 8", I don't know, if you ever have to plane that much, just break out the planer. As far as it how it works... pretty well. That chip (sawdust) collector we have attached to it works well, but when you are planing close to a 1/2" those bags start to fill up quickly. In short the JET planer does just fine as long as you change the knives from time to time.
mo
