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Simpactor® Pin Mill


The Sturtevant Simpactor® is a centrifugal, pin-type impact mill that reduces low- to medium-density materials to uniform fine particle sizes of 50-200 mesh. Designed to use varying degrees of impact and agitation to process materials. From high impact grinding to controlled, slower RPM mixing and blending, Sturtevant Pin Mills are easy to operate, highly reliable, safe and simple to adapt to any application.

Learn more about the Simpactor® pin mill by clicking on the links below. If you have any questions, please contact us.


Models & Specs
Mill Size/Diameter HP Capacity (TPH) Weight (lbs) Overall
Dimensions (ft.)
L x W x H
3 25 4 1,000 54″ x 26″ x 52″
6 150 30 3,700 72″ x 36″ x 70″
40 300 60 10,000 96″ x 60″ x 102′
Features & Benefits
  • Low maintenance
  • Economical: low energy consumption with high throughput
  • Efficient and effective: uniform, precise grind
  • Easy to operate: can adjust grind while operating
  • Dry or wet grinding
  • Gravity or pneumatic feed
  • Optional liner and pin materials available
  •  Wear liners
  • Stainless steel contacts
  • Feeder
  • Aluminum Sulfate
  • Corn Fractionation
  • Densification
  • Flours
  • Fertilizer
  • Gypsum, Stucco (Low Silica)
  • Packed Product
  • Recovery
  • Soda Ash
  • Starch Densification
  • Food
  • Talc
  • Clay
  • Corn Slurry, Dry Corn
  • Dry Chemicals
  • Deagglomeration
  • Hydrated Lime
  • Infestation destruction
  • Kaolin and Other Clays
  • Resin
  • Sodium Bicarbonate
  • Sugar, Sweeteners
  • Trona
  • Deagglomerate Powders (even Tungsten Powder)

Watch the illustrated demonstration of how our product works by clicking the image to the right.Simpactor

What type of material is suitable to process with the Simpactor mechanical impact type mills?

Material should be:

  • Non-sticky
  • Somewhat friable
  • Mildly abrasive
  • No harder than 3 mohs
  • Feed material should not be hotter than 100dF

How much free silica can be in my material?

If Tungsten carbide internal impact and wear parts are used (optional abrasion resistive package), 3 to 5% silica may be tolerated. This option should incorporate a metal detector upstream to the mill to protect these Tungsten Carbide parts. If Tungsten Carbide is not selected for internal wear protection other type abrasion resistive parts can be offered. The silica limits on these are 2% for the Simpactor.

How fine can I mill my material? What are the top and bottom size constraints?

The Simpactor can mill down to a range of 300uM (50 mesh) to 45uM dependant on the feed rate, the feed material size (PSD) and the friability of the material

How much horsepower, KWH use is needed to process my material and for what capacity/feed rate?

The Simpactor 300 installed hp for 25 to 50 TPH depending on material type.

Is my material blown through the Simpactor? If so, what type of auxiliary equipment is needed? Is the auxiliary equipment included with the mill?

The Simpactor can have material blown through in most cases except the smallest 25 hp model requiring no auxiliary equipment. If the material is processed within a gravity feed method, an existing plant nuisance dust collector is needed to remove air venting from the Simpactor cone hopper. Sturtevant can also supply an out-sourced small nuisance dust collector.

Can I mill slurry? If so, what is the range of moisture?

Yes. The material should have a moisture range of 2 to 5% maximum to process best.

How often should I clean the mill? Are the internal parts easily accessed?

Depending on the material, cleaning the mill can range from once a month to never. Some models offer an optional water wash system. The internal parts can be accessed by removing only a few to a dozen bolts. Some models come with quick disconnect clamps and hinged clamp type designs.

Do you offer wash-down or stainless steel designs?

Yes. We offer mild carbon steel design with either enamel or epoxy paint as an option and also have 304 and 316 Stainless Steel designs available.

How quick can we expect delivery?

Delivery under normal circumstances is 12 to 14 weeks after the design and drawings are agreed upon.


Sturtevant is more than an equipment manufacturer, we stand behind every product we sell.

Not only do we strive to provide the best product for each and every application, but we also test, evaluate and maintain our products to assure our clients’ needs.

Sturtevant offers a variety of services to assist with the development, maintenance and testing of products.

  • Lab Sample Testing
  • Field Services
  • Reconditioning
  • Replacement Parts