A hammermill is a machine used to shred or crush materials such as woody biomass into smaller pieces. The basic design involves a rotating shaft to which free-swinging hammers rotate at a high speed. The drum holds the material that needs to be processed until it can be crushed by the mill. A hopper feeds the source material into the drum. The hammers gradually break up the material until it is small enough to pass through a screen with openings corresponding to the desired size. The biggest disadvantage of using a hammermill is, having to replace its lining because of the constant wear of the rotating hammers.
John Deere hammer mill in operation
Hammer mills for wood
1. Petersen, Christian, and Susan Barwick. WiseGeek. Conjecture, n.d. Web. 21 Dec. 2012. .
2. Dallas, Daniel B. Tool and Manufacturing Engineers Handbook: A Reference Work for Manufacturing Engineers. New York: McGraw-Hill, 1976. Print.
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