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Double up on the Diploma in Single Malt Whisky at the Port of Leith Distillery (11 & 12 July 2024). When you gift a place, you get a place for free!

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Scotch whisky milling equipment: the hammer mill

Scotch whisky milling equipment: the hammer mill

The hammer mill is usually paired with a mash filter. The husk is not required in a mash filter, and as much flour as possible is required. So, malted barley is crushed in a hammer mill to create as fine a flour as possible. The basic theory is that the finer the flour, the easier it is for the malt enzymes to access the carbohydrates and convert them into shorter-chain fermentable sugars that the yeast can process. 

A distillery’s choice of equipment is usually determined by a) the grain(s) they intend to use and b) the style of distillation they’re after. Due to this, there are many combinations of brewing equipment across the industry for milling, mashing and fermenting.

Hammer mills use rectangular pieces of hardened steel to pulverise the grain, which has been fed into the milling chamber. Used by several Scotch and Irish whiskey distilleries, the hammer mill can be used for almost any grain type, including malted, and unmalted grains for pot distillation, as well as maize and other grains used in column still distillation. 

Whether you’re just starting out on your journey in Scotch or have been an enthusiast for some time, the Certificate in Scotch Whisky is perfect for improving your knowledge. Whet your appetite and sign up for a Free Preview here. See for yourself how fun and accessible the material is and get a sense of the juicy Scotch whisky knowledge you can absorb.
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