HOME>>Product>>roll crusher trader. Henke 7 X 27 Roller Mill ( corn cracker roll crusher . Henke Roller Mill. The rolls are 7" in diameter X 27" wide they have 6 grooves per inch on them. Comes with a magnet in the hopper. Model number is B 27 and the serial number is 6065 M Unit is equipped with a 15 hp 3 phase 208220 / 440 volt motor.