... .2. Working introduction:HKJ250,HKJ300,HKJ350,HKJ450,HKJ610 are professional feed pellet mills. If u want to press 8mm feeds,We ... the machine. The material is put into screw feeder, then through adjusting speed-adjusting motor to change speed, getting proper material ... ensure machine high precision and quality.3. Working efficiency:All feed machine can be with steam and without steam . difference as ...