Across, PQN4-110V, 4x1000ml Gear-Drive 4-Liter Planetary Ball MillPQN4-110V Includes Only:PQ-N4 4 x 1000ml ball mill - 1 pcJar clamping device - 4 pcsStainless steel sieve - 1 pcRubber jar cushion - 4 pcSpare motor belt - 1 pcHex L-key - 1 pcBall mill height adjuster - 1 pcSpare cap screw - 2 pcsSpare fuse - 1 pcOperation manual - pcPQ-N4 series planetary ball mills may be used for mixing, homogenizing, fine grinding, mechanical alloying, cell disruption, small volume high-tech material production and even colloidal grinding. They are the ideal wet/dry milling tools for acquiring research samples with high efficiency and low noise. Vacuum jars may be used to process sample within a vacuum environment.PQ-N4 planetary ball mills have four grinding stations arranged on the "Sun Wheel" of the planetary ball mill. When the Sun Wheel rotates, the grinding balls inside the jars are subject to superimposed rotational movements, known as Coriolis Forces. The difference in speeds between the grinding balls and jars produce an interaction between frictional and impact forces, which release high dynamic energies. Minimum granularity of the final product can be as small as 0.1 micron.A timer controls running time from 1 to 999 minutes; it also controls jars' direction of rotation and intervals. Depending on your application, the material your grinding media is made from may be imperative to achieving accurate results.Features:High uniformity and excellent repeatabilityFast rotational speed, high efficiency and fine granularityFour samples with different sizes and materials in one experimentLeak-proof jars for wet grindingLarge range of materials accessible for grinding mediaGear-drive offers an effective solutions to problems caused by belt driving, such as belt creep and belt abrasionLow center of gravity, good rigidity, compact structure, low noise, safe and reliable operationAdjustable heightSafety switch ensures automatic shut down if cover is opened during operation.