1,Carrying capacity, driving ability 2,1aaThe adjustment screw holes of roller reserve center distance, to adapt to the chan KT adjustable ... 40402*0.75500-4200Φ425*1202*φ415*40KT-50502*1.1750-4800KT-60602*1.5750-4800KT-8080850-5000Φ500*1202*φ490*70KT ... use manual and electric ball screw transmission regulation center distance5,KT adjustable welding roller frame according to user's special requirements ...