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Until the development of the John System, vertical mills used long bars attached to a small diameter agitator shaft.
The John System incorporates a large diameter cooled shaft with short pegs radially fastened to the diameter (see figure). This design eliminates the low energy zone and results in uniform peripheral speeds. The product to be processed passes through the small anulus created by the large diameter shaft and the chamber wall. The uniform grinding action ensures complete dispersion of very high viscosity/high solids formulas.
NETZSCH Vertical Mills
Vertical Mills are available in sizes that have been designed for specific applications such as grinding ferrites, offset inks and chocolate. |
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