Grinder & Polisher
(Air Pressure_Twin )


Other Data:


The automatic air pressure grinding and polishing machine (P20G-2-R6) is a specialized dual disc grinding and polishing machine used for metallographic specimen preparation. It is equipped with a pneumatic pressure grinding head, allowing precise adjustments of parameters such as pressure force, disc speed, head speed, and preparation time according to the requirements of metallographic preparation and the material of the sample, to produce a perfect sample surface. This is particularly crucial in the metallographic pre-processing process to ensure the reliability and accuracy of subsequent metallographic analysis. Such features make it convenient for metallographic microstructure observation, metallographic analysis, material analysis, and hardness testing of metal materials or other materials.

Whether in academic research or industrial applications, the high adjustability and automation features of P20G-2-R6 that enable users to easily perform various preparation operations and obtain consistent and high-quality sample surfaces. This makes the machine essential and indispensable equipment in metallographic laboratories and material research fields.


※Mobiles and tablets can be slid left and right.


Superior industrial material body


Exquisite Appearance

Streamline appearance design and glossy film surface finishing makes the mechanical appearance artistic and exquisite.



Multi-functional control panel

It is equipped with a high-quality color touch panel, intuitive human-machine interface, and 10 modules of parameter memory function.



Low speed grinding and polishing function

Rotational speed can be lowered to 1 rpm. With external dispenser (optional), it meets the requirement of long-time polishing process without deformation.



Rotational speed of the head is adjustable

The grinding head is equipped with brushless motor with rotation speed from 10~170rpm.



Dispenser (Optional)

Users can control the dispenser by setting up the parameters on control panel.



Automatic drying function

The automatic drying function makes the cleaning process more fast. Also, avoiding the cross contamination during the operating process.


Overload protection

When the total force is more than the default setting during operation, the machine will stop automatically.



Sample Pistons

Sample pistons will lower down lightly to prevent the surface of the specimen from damage.


Modular design

The combined control box can be fixed behind the machine or be placed next to the machine with quick-change design, which is easy to maintenance and can maximize the space.




Individual pressure

Pressing force is between 0.5~6kg. The suggested pressure and amount of samples are marked on the grinding head.


Individual micro force (Optional)

Pressing force is between 0.2~1kg. Suitable for the specimen, requiring the micro force pressing during grinding/polishing.


Central force (Optional)

Pressing force is between 3~12 kg. Quick-released sample holder simplifies the leveling process and cleaning process.



Various choices of platen

Platens with size 8” and 10“ are suitable for any kinds of consumables .



Telescopic water hose and air pressure gun

The machine can be cleaned conveniently.


Various Anti-splash application

Various anti-splash covers can be applied based on the method of polishing process.











Platen Size (mm)

Ø203.2  (8”)

Ø254 (10”)

Platen Quantity


Sample Size / Quantity

Ø25mm, Ø25.4mm,

Ø25mm, Ø25.4mm, Ø31.75mm,

Ø31.75mm, Ø32mm/ 6pcs

Ø32mm /6pcs


Ø38.1mm, Ø40mm/3 or 4pcs


Individual Force 

Max. Grinding Quantity

0.5~2kg 6 pcs,

0.5~4kg 3 pcs,

0.5~6kg 2 pcs,

Max. 12kg in total

Precision Individual Micro

Force (kg)

0.2~1 (Optional)

Central Force (kg)

3~12 (Optional)

Platen Motor Power (W)


Platen Rotational Speed (rpm)


Head Motor Power (W)


Head Rotational Speed (rpm)



1~360000s (Max. 6000mins)

Machine Dimension

WxDxH (mm)


Machine Weight (kg) AC110V 1Ø



Machine Weight (kg) AC220V 1Ø



Standard Accessories

Grinding Platen 1pc, O-Ring 1pc, Polishing Platen 1pc, Anti-Splash Cover 4pcs, Silicon Carbide Paper 8 pcs, Polishing Cloth 2pcs, Aluminum Oxide Powder 100g, Filter 1 set,  PU Pipes 6m, Dispenser 1 pc, Air Pressure Gun 1set


P20F0030 Dispenser Set, PA0108-1 8” Anti-Splash Cover (Manual), PA0108 10” Anti-Splash Cover (Manual), PA0108-3 8” Anti-Splash Cover (Auto), PA0108-4 10” Anti-Splash Cover (Auto), PA0108-2 Anti-Splash Cover (Full-Cover)