Planetary Ball Mill PM 100

• extreme speeds for particularly high fineness down to submicron range
• 1 grinding stations
• grinding jars with volumes from 12 ml to 500 ml, in 6 materials
• suitable for long-term trials and continuous use
• reproducible results due to energy and speed control
• direction reversal
• FFCS technology compensates vibrations
• programmable starting time
• power failure backup ensures storage of remaining grinding time
• 1-button operation with graphic display
• 10 combinations of grinding parameters can be stored
• measurement of input energy helps to optimize grinding parameters
• automatic grinding chamber ventilation for cooling the grinding jars
• 2-year warranty, CE-conforming

Applications	pulverizing, mixing, homogenizing, colloidal milling, mechanical alloying
Field of application	Agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment, glass / ceramics, medicine / pharmaceuticals, mineralogy / metallurgy
Feed material	soft, hard, brittle, fibrous - dry or wet
Size reduction principle	impact, friction
Material feed size*	< 10 mm
Final fineness*	< 1 µm, for colloidal grinding < 0.1 µm
Batch size / feed quantity*	max. 1 x 220 ml, max. 2 x 20 ml with stacked grinding jars
No. of grinding stations	1
Speed ratio	1 : -2
Sun wheel speed	100 - 650 min-1
Effective sun wheel diameter	141 mm
Type of grinding jars	"comfort"
Material of grinding tools	hardened steel, stainless steel, tungsten carbide, agate, sintered aluminium oxide, zirconium oxide
Grinding jar sizes	12 ml / 25 ml / 50 ml / 80 ml / 125 ml / 250 ml / 500 ml
Setting of grinding time	digital, 00:00:01 to 99:59:59
Interval operation	yes, with direction reversal
Interval time	00:00:01 to 99:59:59
Pause time	00:00:01 to 99:59:59
Parameter combinations that can be stored	10
Measurement of input energy possible	yes
Interface	RS 232 / RS 485
Drive	asynchron motor with frequency converter
Drive power	750 W
Protection code	IP 30
Power consumption	~ 1250 W (VA)
W x H x D closed	630 x 468 x 415 mm
Net weight	~ 86 kg
Workplace related emission value	LpAeq < 85 dB(A)
*depending on feed material and instrument configuration/settings

The grinding jar is arranged eccentrically on the sun wheel of the planetary ball mill. The direction of movement of the sun wheel is opposite to that of the grinding jars in the ratio 1:-2.
The grinding balls in the grinding jars are subjected to superimposed rotational movements, the so-called Coriolis forces. The difference in speeds between the balls and grinding jars produces an interaction between frictional and impact forces, which releases high dynamic energies. The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.

Planetary mills with a single grinding station require a counterweight for balancing purposes. In the Ball Mill PM 100 this counterweight can be adjusted on an inclined guide rail. In this way the different heights of the centers of gravity of differently-sized grinding jars can be compensated in order to avoid disturbing oscillations of the machine.

Any remaining vibrations are compensated by feet with some free movement (Free-Force Compensation Sockets). This innovative FFCS technology is based on the d’Alembert principle and allows very small circular movements of the machine housing that result in an automatic mass compensation. The laboratory bench is only subjected to minimal frictional forces generated in the feet.

In this way the PM 100 ensures a quiet and safe operation with maximum compensation of vibrations even with the largest pulverization forces inside the grinding jars and therefore can be left on the bench unsupervised.