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Dry Grinding Laboratory
Batch or Continuous Attritors

How Continuous or Batch Dry Grinding Attritors Work

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Dry Grinding Attritors can be operated in Continuous or Batch operation. For a complete explanation of how Dry Grinding Attritors work in both Continuous and/or Batch operation, please download the Technical Paper “Attrition Dry Milling in Continuous and Batch Modes”

Why A Laboratory Attritor?

Union Process customers know from experience that the Attritor is one of the most versatile pieces of equipment in their lab. It can be equipped or retrofitted easily and inexpensively with a wide variety of components and accessories. With Attritor lab mills, users can choose wet or dry grinding, introduce inert atmospheres, operate at controlled temperatures, vary grinding speed, overcome product contamination, change media size and type, and get precise energy consumption information, all on the same lab mill. Results are repeatable from one test grind to another for maximum credibility. Finally, the Attritor is ideal for formulating, quality control, and scale-up studies.

Advantages of Using a Laboratory Attritor:

• Fast and efficient grinding
• Numerous options
• Flexibility
• Repeatability
• Scale-up capability
• No premixing
• Easy operation
• Low maintenance

Common Applications for Attritors:

• High tech ceramics
• Paints, toners, inks
• Pigments
• Tungsten carbides
• DSM (mechanical alloying)
• Food products
• Chocolate, confectionery
• Pharmaceuticals
• Chemicals
• Ferrites
• Fibers
• Paper coatings
• Metal powders
• Metal oxides
• Glasses
• Glazes
• Minerals, coal
• Agricultural flowables

1SB dry grinding laboratory mills
Model SD-1

Model SD-1 Laboratory Attritor

The SD-1 Attritor is a versatile, reliable, rugged lab mill designed to meet virtually all lab grinding and dispersing needs – wet or dry, continuous or batch. It allows easy and precise scale-up to production-size equipment with reproducible results. It is also suitable for small production or pilot plant work. See our Lab Grinding Mills Brochure for information on the smaller 01-HD Series and a more detailed description of the many accessories and options available.

Multi-Tank HD-01 Lab Attritor System

The Multi-Tank HD-01 Lab Attritor System is the ultimate set-up for quality control and test grinding requirements.

  • All tanks (expandable from 2 to 6) controlled by ONE power source
  • A timing belt assures that all connected Attritor shafts run at the same speed for the same period of time.

Choose standard stainless steel or a metal-free system with all tanks constructed from alumina, zirconia, or Tefzel®.

Multi-tank laboratory grinding mill
Multi-Tank HD-01

SD-1 Series
Mechanical Drive
Electronic Drive
Tank Capacity (gal)
Working Capacity (gal)
Media Volume (gal)
HP - Standard Dry Grinding
2 HP
3 HP
3 HP
5 HP
HP - DSM (mechanical alloying)
3 HP
5 HP
5 HP
Height (inches)
Bench Space (W x D in inches)
Machine Weight (lbs) w/o media
Standard Power for all lab machines is 230/460V, 3 phase
The SD-1 is equipped with a variable speed drive system (either mechanical or electronic)
and tachometer to measure shaft RPM. All the grinding tanks are water jacketed.
Equipment can be built to CE specifications, if required.


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