Hammer mills work on the principle

Hammer mills work on the principle
that most materials will crush,
shatter, or pulverize upon impact:
The Process:
• Material is fed into the mill’s
chamber through the feed chute,
typically by gravity.
• The material is struck by ganged
hammers (generally rectangular
pieces of hardened steel) which
are attached to a shaft that
rotates at high speed inside the mill’s grinding chamber.
• The material is crushed or shattered by a combination of repeated hammer impacts,
collisions with the walls of the grinding chamber, and particle on particle impacts.
• Perforated metal screens or bar grates covering the discharge opening of the mill retain
coarse material for further grinding, while allowing properly sized materials to pass as
finished product.