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Sanding Discs
Thermo Scientific
Figure 7.
Assembling the Grinder
Remove the battery before assembling the grinder, backup pad and sanding disc. Start by
installing the backup pad onto the drive shaft of the grinder, or, with some backup pads. You
will need to screw it onto the threaded shaft.
Next place the sanding disc over the drive shaft onto the backup pad. Hold the locking button
on the reverse side of the grinder while tightening the retaining nut into the hole of the
sanding disc.
Once the backup pad, sanding disc and locking nut are secured, reinstall the battery. The
grinder is now ready for use.
It has been well tested and determined that samples can be easily contaminated by the abrasive
material contained in and on a sanding disc. An example would be the increase in aluminum
content of carbon steel after grinding the sample with a new aluminum oxide sanding disc.
Aluminum from the aluminum oxide disc imbeds itself in the surface of the steel sample and
an XRF would show an unusually high aluminum concentration.
5
Common Operations
Metal Sample Prep
Niton XL2 Analyzer User's Guide
57
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