Brewery Grain Handling and Milling
Consistent milling sets up consistent lautering. This guide covers grain handling and milling choices from bulk silo to the grist case, including gap discipline and dust control.
Mill Types
Two-roll mills dominate craft brewing; four-roll and wet mills improve extract but add cost. Match roller configuration to your malt bill and lauter tun.
Gap Setting and Grist Quality
Set roller gaps from a calibrated feeler gauge, not by look. Consistent husk integrity and endosperm crush drive runoff speed and extract.
Conveyance and Storage
Silo, auger and destination-bin systems should minimize handling and moisture pickup; food-grade surfaces and cleanable routes are mandatory.
Dust and Safety
Grain dust is a explosion hazard — use grounded conveyance, dust collection and documented hot-work controls around milling areas.
Frequently Asked Questions
How often should mill gaps be checked?
Weekly during active brewing, and after any roller change or hard foreign-object event.
Can I mill specialty grains separately?
Yes — separate milling of roasted malts protects husks and lets you dose precisely per recipe.
Does milling affect efficiency?
A tight, consistent crush typically recovers 1–3% more extract than a sloppy one across a season.
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