Williams Patent Crusher is a leading industrial hammer mill manufacturer. Our industrial size reduction machines can handle any material size reduction job. Choose a Williams machine for high efficiency and economy. Using midair and impact crushing, grinding, and shredding, our machines can handle virtually any material.

Learn more about our hammer mill crushers below and contact the Williams team to discuss your application. Our sales engineers can help you find the right machine for the job.

What is a Hammer Mill?

A hammer mill is a particle size reduction machine. These machines grind and crush material using continual, high-speed hammer blows. This internal hammer shatters and disintegrates the material. Mills can be primary, secondary, or tertiary crushers, allowing for a wide variety of applications.

What is the Finished Product Size?

The finished product size depends on a few variables of the machine:

  • Number and size of hammers

  • Rotor speed

  • Setting of the grinding plate

  • Size of the openings in the perforated screens 

Hammer mills are often used for crushing and grinding material to less than 10 US mesh. Learn more about size reduction options with our Particle Size Conversion Chart..

Hammer Mill Usage by Industry

Williams hammer mills are a popular choice when it comes to particle size reduction. While many use these machines as rock crushers and stone crushers, they offer more versatility. Some of the industries and applications that benefit from this machine are:

  • Agricultural industry: To crush feed, grains, and agricultural limestone into digestible particles
  • Energy industry: To reduce fuel sources such as coal, corn, wood, biomass, biofuels, and more
  • Aggregate industry: To crush and grind gypsum, shells, limestone, clays, and more
  • Recycling industry: To finely crush printed circuit boards, “meatballs” and light scrap fiberglass
  • Medical industry: To create fine powders to use in chemicals or pharmaceuticals

​Hammer Mill Grinders from Williams Crusher

Williams has been designing and manufacturing industry-leading hammer mills since 1871. We continue to innovate to exceed the evolving needs of our customers worldwide. Our vision is to recognize changes in the marketplace and provide a quality product. With Williams, you receive a quality product that always delivers the efficiency and ruggedness you expect. 

View our various machines below to learn about their applications and capabilities.

High Tonnage Hammer Mills

Williams manufactures rugged hammer mills to handle high-tonnage size reduction jobs. This heavy-duty equipment reduces large materials, such as automobile bodies. More applications include rock and coal crushing, reducing limestone to sand and pulverizing metal turnings. They can also shred waste, wood, and paper for baling or burning.

Learn more about High Tonnage Hammer Mills.


High Tonnage Hammer Mills - Willams Patent Crusher


Rocket Hammer Mills

The Williams Rocket Hammer Mill rapidly reduces non-abrasive materials to particle sized pieces. Applications include turning materials into fine granules. These materials include cereal, animal by-products, sawdust, expeller cake, rags, and wood pulp.

Learn more about the Rocket Hammer Mill.



Rocket Hammer Mill & Sawdust Grinder – Williams Patent Crusher


Meteor Hammer Mills

Meteor hammer mills use a high hammer-tip speed to produce a finer product. If your finished product needs to have specific characteristics, this is the ideal hammer mill. It is well suited for producing high-quality fluff for the absorbent and non-woven fiber markets.


Learn more about the Meteor High Speed Hammer Mill.


High-Speed Meteor Hammer Mills – Williams Patent Crusher


Type GP Hammer Mills

The Type GP Hammer Mill is a simple, rugged machine for small and medium capacity particle size reduction jobs. It's used for a variety of applications from coal to limestone to salt cake, sawdust, and woodchips. It is a versatile machine that performs efficient particle size reduction. The Type GP also has customization options to meet your specific application needs.

Learn more about the Type GP Hammer Mill.


Type GP Hammer Mills – General Purpose Hammer Mills – Williams Patent Crusher


Ring Hammer Crushers

Williams Ring Crushers are also known as turnings crushers. They reduce the size of metal turnings, “bullshellings,” or clips through impact crushing. Ring crushers produce their rated capacities with little down time and custom capabilities. This customization allows you to meet the exact specifications for your material reduction application.


Learn more about the Ring Hammer Crushers.


Ring Hammer Crusher Hammer Crusher – Williams Patent Crusher


Slugger Crusher Hammer Mills

This type of hammer mill is the ideal choice for applications requiring a large feed opening. It is suitable for continuous jobs with either hourly output or reduction ratio. These machines have rigid steel plate frames that resist shock and failure from fatigue. The adjustable breaker plates also compensate for wear.


Learn more about Slugger Crusher hammer mills.


Slugger Crushers Hammer Crushers – William Patent Crusher


Traveling Breaker Plate Mills

The Traveling Breaker Plate Mill is a non-clog hammer mill. This engineering allows a Slugger Crusher to reduce rock, clay, shale and bauxite to ¾” or smaller. It can reduce wet, sticky materials to a size suitable for further refinement. Its self-cleaning breaker plates reduce maintenance and service costs.


Learn more about traveling breaker plate mills.



Traveling Breaker Plate Mills – William Patent Crusher


NF and GA Type Hammer Mills

These mills are “overrunning” machines, reducing material on breaker plates and then crushing on grates. Their design is for operations that need processed feed before reaching the discharge area. Both models have very rugged construction for considerable material reduction.


Learn more about Williams NF and GA Hammer Mills.


NF & GA Type Hammer Mills – Williams Patent Crusher


Reversible Hammer Mills

This machine's name comes from its ability to reverse the direction of the rotor. This rotor supports the hammers, bringing fresh grinding edges into action. The reversible capabilities lower the frequency of servicing. Our reversible hammer mills increase production, double the life of your hammers, and reduce maintenance costs.


Learn more about Williams reversible hammer mills.


Reversible Hammer Mills – William Patent Crusher


Rigid Arm Breakers

This type of hammer mill has rigid hammers rather than swing mounted. This design makes the machine effective for the pulverization of soft, fibrous, or bulky materials into fine powders. It is also suitable for the reduction of friables like coal. Each ridged arm breaker has many edges that can be indexed and presented as wear occurs.


Learn more about our rigid arm breaker machines.


Rigid Arm Breakers Hammer Crusher – Williams Patent Crusher




Contact us today to discuss your application in detail with one of our experienced sales engineers. Call (314) 621-3348, email us at info@williamscrusher.com or locate an agent near you.