MP-2B Grinding And Polishing Machine

MP-2B

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The MP-2B stepless speed-adjustable test grinder and polisher is a double-disc desktop machine suitable for pre-grinding, grinding and polishing of metallographic specimens. The machine can directly obtain a speed between 50-1000 rpm through a frequency converter, making the machine more widely applicable. It is an indispensable device for users to make metallographic specimens. The machine is equipped with a cooling device, which can cool the specimen during pre-grinding to prevent the metallographic structure from being damaged due to overheating of the specimen. The left disc of the machine is a pre-grinding and grinding disc, and the right disc is a polishing disc. This machine can not only perform light grinding, rough grinding, semi-fine grinding and fine grinding on the specimen, but also perform precision polishing on the specimen. This machine can be operated by two people at the same time, and is an ideal sample preparation equipment for factories, scientific research units and laboratories of colleges and universities.
Main technical parameters Operating Voltage: 220V50HZ Grinding disc diameter: 230mm speed 50-1000 rpm (customizable) Polishing disc diameter: 200mm speed 50-1000 rpm (customizable) Sandpaper diameter: 200mm Motor: 550W Dimensions: 710*670*360mm Weight: 45KG Common consumables (optional) Metallographic sandpaper 180#240#320#400#600#800#1000#1200#2000#3000#4000#5000#etc. Diamond grinding disc 180#240#320#400#600#800#1000#1200#2000#3000#4000#5000#etc. Diamond sandpaper 45-0.3um etc. Polishing cloth Red velvet/grey velvet/black velvet/pink velvet/navy/nylon/canvas etc. Diamond polishing agent W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc. Diamond Suspension W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc. Alumina polishing powder W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc. Grinding parameters Metallographic sandpaper size Grinding and polishing disc revolutions Requirements to be met Coarse grinding 240#-600# 50r/min-600 r/min Remove processing marks left by cutting Fine grinding 800#-2000# 50r/min-600 r/min Removing coarse grinding sandpaper scratches Fine grinding 2000#-7000# 50r/min-600 r/min Grind to near mirror surface without obvious grinding scratches Note: The grit number of metallographic sandpaper and the speed of grinding and polishing disc should be appropriately selected according to the material of metallographic specimen or the technical requirements of process. When the specimen requirements are general, the fine grinding step can be omitted. When the specimen requirements are high, the grinding step should be appropriately increased. Polishing parameters Polishing agent particle size Grinding and polishing disc speed range Requirements to be met Rough polishing W3-W5 500r/min-1500r/min Remove fine wear marks and surface deformation layers left by fine grinding Fine polishing W1-W3 500r/min-1500r/min Remove fine scratches left by rough polishing Fine polishing W0.05-W0.5 500r/min-1500r/min Polished to a scratch-free mirror finish Note: 1. The type of abrasive used in the polishing agent, the particle size, the grinding and polishing disc speed and the fabric used should be appropriately selected according to the different metallographic sample materials or process technology requirements. Commonly used grinding/polishing consumables are: grinding paste, polishing powder, spray polishing agent and suspension. Abrasives include aluminum oxide, chromium oxide, diamond and silicon oxide. 2. When the sample requirements are higher, the polishing steps should be appropriately increased. Metallographic sandpaper comparison table Sandpaper grit Particle size (UM) Code 120 W125 140 W100 180 W80 200 W70 240 W63 280 W50 320 W40 0 400 W28 01 500 W20 02 600 W14 03 800 W10 04 1000 W7 05 1200 W5 06 1400 W3.5 07 1600 W3 1800 W2.5 2000 W2 2500 W1.5 3000 W1 3500 W0.5 4000 W0.1 After-sales service: one-year free warranty and lifetime maintenance.

Operating Voltage:	220V50HZ
Grinding disc diameter:	230mm speed 50-1000 rpm (customizable)
Polishing disc diameter:	200mm speed 50-1000 rpm (customizable)
Sandpaper diameter:	200mm
Motor:	550W
Dimensions:	710670360mm
Weight:	45KG

Metallographic sandpaper	180#240#320#400#600#800#1000#1200#2000#3000#4000#5000#etc.
Diamond grinding disc	180#240#320#400#600#800#1000#1200#2000#3000#4000#5000#etc.
Diamond sandpaper	45-0.3um etc.
Polishing cloth	Red velvet/grey velvet/black velvet/pink velvet/navy/nylon/canvas etc.
Diamond polishing agent	W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc.
Diamond Suspension	W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc.
Alumina polishing powder	W0.5/W1/W2/W2.5/W3/W3.5/W5/W7/W10/W14 etc.

	Metallographic sandpaper size	Grinding and polishing disc revolutions	Requirements to be met
Coarse grinding	240#-600#	50r/min-600 r/min	Remove processing marks left by cutting
Fine grinding	800#-2000#	50r/min-600 r/min	Removing coarse grinding sandpaper scratches
Fine grinding	2000#-7000#	50r/min-600 r/min	Grind to near mirror surface without obvious grinding scratches
Note: The grit number of metallographic sandpaper and the speed of grinding and polishing disc should be appropriately selected according to the material of metallographic specimen or the technical requirements of process. When the specimen requirements are general, the fine grinding step can be omitted. When the specimen requirements are high, the grinding step should be appropriately increased.

	Polishing agent particle size	Grinding and polishing disc speed range	Requirements to be met
Rough polishing	W3-W5	500r/min-1500r/min	Remove fine wear marks and surface deformation layers left by fine grinding
Fine polishing	W1-W3	500r/min-1500r/min	Remove fine scratches left by rough polishing
Fine polishing	W0.05-W0.5	500r/min-1500r/min	Polished to a scratch-free mirror finish
Note: 1. The type of abrasive used in the polishing agent, the particle size, the grinding and polishing disc speed and the fabric used should be appropriately selected according to the different metallographic sample materials or process technology requirements. Commonly used grinding/polishing consumables are: grinding paste, polishing powder, spray polishing agent and suspension. Abrasives include aluminum oxide, chromium oxide, diamond and silicon oxide. 2. When the sample requirements are higher, the polishing steps should be appropriately increased.

Sandpaper grit	Particle size (UM)	Code
120	W125
140	W100
180	W80
200	W70
240	W63
280	W50
320	W40	0
400	W28	01
500	W20	02
600	W14	03
800	W10	04
1000	W7	05
1200	W5	06
1400	W3.5	07
1600	W3
1800	W2.5
2000	W2
2500	W1.5
3000	W1
3500	W0.5
4000	W0.1