</font><font color="blue" class="small">( The shredder hopper is 20" x 30" however . The wallenstein's hopper (for the
chipper is 22" x 22"). )</font>
Larry, don't be confused by the size of the opening to the chute. The size at the "business end" of the chute has lots more to do with efficiency. The input chute to my shredder will allow bushy material to fit, but as soon as any part of that brush hits the shredder, it self-feeds the rest of the material right into the blades through a 14"x12" opening. On the
chipper side, the chute tapers down to a 5"x 6" opening. You have to poke pretty hard with a stick to get that brushy top of a limb down far enough to be chipped. On the other hand, you just drop the material into the shredder and even if you have to poke it down with a stick, you only have to do that once and it is gone. Whoosh! Just look at the design of the shredder drum here:
Chipper-shredder
My guess is that the larger machines have a much larger opening into their
chipper and so the shredder is not required. Also, as the
chipper wheel gets larger, it's much more expensive. If you would have to charge $6,000 to make this machine a
chipper-shredder, then you have to compete with the hydraulic, self-feed guys at about the same price. I think everyone here would agree that if you can find the funds to buy one of those machines, we'd all be sending you replies about how jealous we are rather than giving you advise. /forums/images/graemlins/shocked.gif /forums/images/graemlins/laugh.gif