Williams Patent Crusher is the leading manufacturer of industrial hammer mills and hammer crushers. Our industrial size reduction machines can handle virtually any material size reduction job. Choose a Williams machine for maximum efficiency and economy with midair, impact crushing, grinding, or shredding for a diverse range of materials.

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

Hammer Mill Frequently Asked Questions

Learn more about Williams hammer mills and find the answers to frequently asked questions about the machine below. If you don’t see your question in the FAQs below, contact the experts at Williams.

What is a Hammer Mill?

A hammer mill is a particle size reduction machine that can grind and crush material using continual, high-speed hammer blows to shatter and disintegrate the material. The internal hammer mechanism is where the machine gets its name. Hammer mill grinders can be used as primary, secondary, or tertiary crushers for a wide variety of applications.

What is the Finished Product Size?

The finished product size depends on a few variables, including the number and size of hammers, the rotor speed, the setting of the grinding plate, and the size of the openings in perforated screens.

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

Why Choose a Williams Hammer Mill?

Williams has been designing and manufacturing industry-leading hammer mill since 1871. We continue to innovate in order to exceed the evolving needs of our customers worldwide. Our vision is to recognize changes in the marketplace and provide a quality product that will always deliver the efficiency and ruggedness our customers have come to associate with the Williams Patent Crusher brand. Contact the Williams team today to get a quote on a new hammer mill.

Hammer Mill Usage by Industry

Williams hammer mill grinders are a popular choice when it comes to particle size reduction because they are versatile across a variety of industries and applications. Some of the industries that can benefit from this machine are:

  • Agricultural industry: Hammer mill grinders can be used for crushing livestock feed, grains, and agricultural limestone into digestible particles
  • Energy industry: Reduce fuel sources such as coal, corn, wood, biomass, biofuels, and more
  • Aggregate industry: Hammer mills can crush and grind gypsum, shells, limestone, clays, and more
  • Recycling industry: Finely crush printed circuit boards, “meatballs” and light scrap fiberglass for separation and recycling

High Tonnage Hammer Mills

Williams manufactures a variety of rugged hammer mills to handle various high-tonnage material size reduction jobs. These heavy-duty hammer mills are characterized by their ability to reduce substantial materials, such as automobile bodies. Additional applications for this machine include the crushing of rock and coal, reducing limestone to sand, pulverizing metal turnings, and shredding waste, wood, and paper for baling or burning. Learn more about High Tonnage Hammer Mill.

High Tonnage Hammer Mills - Willams Patent Crusher


Rocket Hammer Mills

The Williams Rocket Hammer Mill is designed for the rapid reduction of large quantities of non-abrasive materials to particle sized pieces. Its applications include turning materials such as cereals, animal and fish by-products, sawdust, expeller cake, rags, and wood pulp into fine granules. There are a variety of Rocket Hammer Mills to choose from depending on your industry and requirements. We will help you select a hammer mill grinder that is best suited to your application. Learn more about the Rocket Hammer Mill.

Rocket Hammer Mill & Sawdust Grinder – Williams Patent Crusher


Meteor Hammer Mills

This type of high-speed hammer is characterized by high hammer-tip speed which produces a finer product or obtains a finished product with specific characteristics. It is particularly 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 can be used for a variety of applications from coal to limestone to salt cake, sawdust, and woodchips. It is a highly 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, also known as turnings crushers, are designed to efficiently reduce the size of metal turnings, “bullshellings,” or clips through impact crushing. These machines are built to produce their rated capacities with minimum down time and are highly customizable 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 crusher is the ideal choice for applications requiring a large feed opening. It is suitable for continuous jobs with either hourly output or reduction ratio. They are designed with rigid steel plate frames that resist shock and failure from fatigue and include adjustable breaker plates to compensate for wear. Learn more about Slugger Crusher hammer mills.


Slugger Crushers Hammer Crushers – William Patent Crusher


Traveling Breaker Plate Mills

The Williams Traveling Breaker Plate Mill is a non-clog hammer mill engineered to allow 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. It has self-cleaning breaker plates, reducing maintenance and service costs. Learn more about traveling breaker plate mills.


Traveling Breaker Plate Mills – William Patent Crusher


NF & GA Type Hammer Mills

These hammer mills are “overrunning” machines, reducing the material on breaker plates before further crushing them on grates. They are specifically suited to operations that require the feed to be thoroughly processed before reaching the discharge area. Both models have extremely 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 is characterized by its ability to reverse the direction of the rotor that supports the hammers, bringing fresh grinding edges into action which minimizes the frequency of servicing. Williams 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

These machines have rigid hammers rather than swing mounted, which makes them especially effective for the pulverization of soft, fibrous, or bulky materials such as paper and corrugated into fine powders. It is also suitable for the reduction of friables like coal. Each ridged arm breaker has multiple 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


Not sure which Hammer Mill is right for your job? Contact a Williams Crusher expert today.


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.