Choosing a model

As reflected in the table, there is some overlap of when certain models are viable depending on recipes and how many runs you do in a day. The key is to make sure your mill can finish batches at least as quickly as your minimum mash time.
In general this table goes higher quality as you move right, but the exception is the RMS 6×6. This is the model they made to compete in the lower price bracket and is the only reason RMS and RAD’s prices overlap.

Mill choice comes down to 3 factors  – Roller size, roller quantity, and quality.

Roller Size

Regardless of roller quantity, initial surface area determines throughput. As you can see from the table below, this is determined more by length than width. Width determines longevity and consistency more-so than throughput.

Roller quantity

More rollers means more consistency and control. With a second pair of rollers the first pair can be backed off, bringing the grains down to a consistent size and reducing jarring on the second pair. This lets you keep more husks in-tact and reduce the presence of fines.

Build Quality

For brewers this usually comes down to RAD vs. RMS, a simple matter of budget. Getting a heavier-duty mill off the bat will save you money in the long-run without a doubt. But if you really need that extra money now, a lighter mill will do. Just remember that it’s not a straight dollar-for-dollar translation. Lighter mills will come with more noise, dust, and repairs (time spent).