Suggested gap in Econo mill rollers?
Tweet. #2. 02-28-2011, 10:13 AM. Dave, We have been using an Apollo (4"x11" rollers) for about 5-6 years now. We actually gap our mill at about 1.65mm, however, that has more to do with our mash tun flow rate and base malt selection. I have taken it down to as low as 1.35mm, but experienced extremely slow run-offs.