While you can argue for years about 'Jinma' chippers made in the Jinma factory, or 'Jinma copy' chippers WC-6, WC-8...etc.... or about Jinma being a copy of a US
chipper..or about the Betst chippers on EBAY being a superior design to even the vaulted 'Jinma' factory chippers ..or what came first, the chicken or the egg....there are 8" chippers out there...they have bigger feed rollers ....they have bigger throats that allow up to an 8 inch branch into them, two inches bigger than the standard 6" 'Jinmas'..and some of them have 20 pound heavier rotors. Granted, they still use the same 10" knives, and about 98 % of the rest of the unit is the same as a 6"....but they do exist..... [ heh....I am not dreaming this up ] The larger throat is more for allowing non-straight branches [most which I allways end up trying to stick in there] to get to where the work is going to be done, and not basically to see if you can chip telephone poles up. My 2 cents, and I am a spending it....