Is There a Difference Between Steel and Stone Milling?

Grain Milling Process Comparison

When using a hand-cranked grain mill, the choice between steel and stone milling depends on the desired outcome. Steel milling involves two steel rollers with a gap that adjusts to control the grind, producing a fine, uniform flour. In contrast, stone milling uses two stones, typically made from granite or basalt, that rotate together to crush the grain, resulting in a coarser, more textured flour.

Flour Quality and Nutritional Content

The type of milling process significantly impacts the quality and nutritional content of the flour. Stone milling tends to preserve more nutrients and enzymes in the grain, such as vitamin B and other beneficial compounds, due to the lower heat generated during the process. In contrast, steel milling can produce hotter temperatures, leading to a loss of these nutrients. A stone mill can maintain a temperature of around 100°F (38°C), while a steel mill can reach temperatures above 200°F (93°C). This temperature difference makes stone milling a preferred choice for those seeking to preserve the natural goodness of the grain.

Milling Efficiency and Maintenance

In terms of efficiency and maintenance, steel milling is generally faster and easier to clean than stone milling. Steel rollers can be adjusted to produce a finer grind, but they may require more frequent sharpening or replacement. Stone milling, on the other hand, requires more effort to adjust the gap between the stones and can be more prone to clogging. However, with proper maintenance, stone mills can last for decades, making them a worthwhile investment for serious home bakers or those seeking a more traditional milling experience.