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- This can be done using the MetaServ Grinder Polisher.
- The hardness of the material one is working with governs which grit sandpaper to start with. For very hard material such as some igneous and metamorphic lithologies it is best to begin with the 180 grit sandpaper disks.
- Simply apply the sandpaper disk to a magnetic disk and place the magnetic disk on the wheel of the MetaServ. (Insert Figures)
- It is important to turn on the water feed while flattening billets. This inhibits any dust particles from rising to the air.
- Keep RPMs between 300 to 400. This is manageable, faster and it will become slightly hazardous and any slower and it would simply take too long to flatten.
- Keep polishing until surface is visibly flat and free from any cut marks caused by the saw.
- Place a 240 grit disk and repeat the process, do this for 400 and 600 grit as well.
- After the 600 grit polish the billet should be completely flat and highly reflective (material dependent), a method to visibly check for flatness is to hold the billet under a light source and it should reflect the light evenly across the entire surface. (see figure below).
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