4x500ml Gear-Drive 2-Liter Planetary Ball Mill

4x500ml Gear-Drive 2-Liter Planetary Ball Mill
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  • Item #: PQN2
  • Accessories included: 4 jar clamping devices, jar cushions & space parts.
  • Running modes: single & bi-directional with digital timing and pause interval
  • Compatible jars: (250ml - 500ml) x 4
  • Final granularity: 0.1 ┬Ám
  * Marked fields are required.
Price $4,590.00

PQ-N2 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-N2 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. We offer various sizes of grinding jars and grinding balls in different materials in our ball mill accessories section. Depending on your application, the material your grinding media is made from may be imperative to achieving accurate results.

 Grinding methods

  • Single direction without timing (samples need long or non-stop milling)
  • Single direction with timing (samples need to be milled in one direction for a designated amount of time before automatic shutdown)
  • Bi-direction with timing (samples need to run clockwise for 1.5 hours, then counter-clockwise for another 1.5 hours and so on, for 15 total hours, before the machine shuts down itself)
  • Single direction with paused interval and timing (i.e. samples need to run for 0.5 hour, then pause for 1 hour, then run for another 0.5 hour in same direction and pause for another 1 hour, for 10 cycles before auto shutdown)
  • Bi-direction with paused interval and timing (samples need to run clockwise for 0.8 hour, pause for 0.5 hour, then run counter-clockwise for 0.8 hour, for 20 cycles, before auto shutdown)


  • High uniformity and excellent repeatability
  • Fast rotational speed, high efficiency and fine granularity
  • Four samples with different sizes and materials in one experiment
  • Leak-proof jars for wet grinding
  • Large range of materials available for grinding media
  • Gear-drive offers an effective solutions to problems caused by belt driving, such as belt creep and belt abrasion
  • Low center of gravity, good rigidity, compact structure, low noise, safe and reliable operation
  • Adjustable height
  • Safety switch ensures automatic shut down if cover is opened during operation


 Electrical requirements
 110V or 220V 50/60Hz single phase, 750 watts
 Compatible non-vacuum jars
 500ml x 4
 Compatible vacuum jars  250ml x 4
 Operation mode
 Two or four grinding jars working simultaneously
 Maximum feeding capacity
 2/3 capacity of the grinding jars
 Feeding granularity
 Soil materials ≤ 10mm, others materials ≤ 3mm
 (If the sample feed is larger than these then it must
  first undergo preliminary size reduction)
 Discharging granularity             
 Down to 0.1 micron
 Maximum continuous operating time

 72 hours

 Planetary jar rotation speed
 290 rpm
 Unit dimensions
 30 x 18 x 25" (DxWxH) height is 44" with cover open
 Shipping dimensions
 36 x 25 x 33" (LxWxH)
 Shipping weight
 300 Lb

Standard package


Part description    






Part image 


 4 x 500ml ball mill
 1 pc

 Jar clamping device
 4 pcs

 Stainless steel sieve
 1 pc

 Rubber jar cushion
 4 pc

 Spare motor belt
 1 pc

 Hex L-key
 1 pc

 110V US power cord
 1 pc

 Ball mill height adjuster                   
 1 pc

 Spare cap screw
 2 pcs

 Spare fuse
1 pc

 Operation manual  1 pc

  1. Except stainless steel jars, all other jars must use stainless steel vacuum jackets when used in vacuum condition.
  2. Vacuum jars or jackets must be operated with a vacuum pump which sold separately.

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