The pre-grinding machine is table style with single disc, which
used for rough grinding, half finished grinding and fine grinding
operation for metallographic sample.
It is necessary for users making metallographic sample. The cooling
system can keep samples metallographic organization in good
condition during grinding and polishing.
It is convenient and on the safe side, an ideal option for lab,
factories, science and research institutions and universities.
|Grinding/polishing disc diameter||203mm|
|Rotate speed of grinding disc||700rpm|
|Input voltage||AC220V 50Hz|
Surface layers damaged by cutting must be removed by grinding.
Mounted specimens are ground with rotating discs of abrasive paper,
for example wet silicon carbide paper.
The coarseness of the paper is indicated by a number: the number of
grains of silicon carbide per square inch. So, for example, 180
grit paper is coarser than 1200 grit.
The grinding procedure involves several stages, using a finer paper
(higher number) each time. Each grinding stage removes the
scratches from the previous coarser paper.
This can be easily achieved by orienting the specimen perpendicular
to the previous scratches. Between each grade the specimen is
washed thoroughly with soapy water to prevent contamination from
coarser grit present on the specimen surface. Typically, the finest
grade of paper used is the 1200, and once the only scratches left
on the specimen are from this grade.
The series of photos below shows the progression of the specimen
when ground with progressively finer paper.