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The circulation Attritor is used for difficult to grind and

disperse materials and for the ultimate in micron size and

quality. The main advantage of the “Q” series is the very narrow

particle size distribution that can be achieved.

Large quantities of material can be ground with a smaller

investment of grinding media and Attritor equipment. The slurry

can be continuously monitored. Additional ingredients can be

added to the premix tank at any time during the grinding, with

sensitive materials being added near the end of the grinding

cycle. Excellent temperature control is possible, since the slurry

spends only 20-30 seconds in the grinding chamber and has

plenty of time to be stabilized in the holding tank.

“Q” series Attritors are available in sizes ranging from the

laboratory size Q-2 model up to the large-scale production

model Q-100. For very large production, several Q-100 Attritors

can be hooked up to a single holding tank.

Circulation Attritors designated as “QL” include specially

configured arms and disks for special applications and

increased performance.

A variety of accessories meeting different conditions, from

cover seals for a totally enclosed system to metal-free systems,

are available.

Standard Features


Special 450% starting torque, 2-speed, 2-winding motors for

easy startup and cleaning


Standard (TEFC) or explosion-proof electric motor and



Grinding tank (304SS) jacketed for heating or cooling


Tank swivels for shaft removal and cleaning


4140 steel shaft with hardened tool steel

agitator arms


Media discharge valve


Choice of variable-speed gear

pump or air diaphragm pump

“Q” and “QL”


Special Options


Tank Linings

—special linings for metal-free grinding are

available. Choose from ceramic (alumina) tiles, food-grade

rubber or polyurethane.


Arm Sleeves

—to accommodate metal-free systems, shaft

arms may be sleeved with plastic, tungsten carbide, or

zirconium oxide.



—can be equipped with a floating shaft seal to

minimize solvent loss, or can be equipped with a MECO

shaft seal for grinding under inert gases, complete with a

product charging port, gas inlet and outlet.


Torque Meter

—for monitoring precise energy consumption

which is used for determining grinding time and for added

quality control.


Stationary Arms

—for high viscosity materials


Q-6 (with holding tank)