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Grit size to micron size


#1

Bonjour

beginner.

for my new studio air quality design;

what’s the dust micron size when using abrasive grit 2000. and 3000

what’s is the dust micron size when polishing,.

work shop is composed of 5 persons:4 buffing tables and 1 polishing

is it better to have small collector at the work sources or to have
a big one with hose duct to each tables?

hope be understood, i’m french.
merci
daniel


#2

I don’t know about micron sizes but years ago we had an
engineer-designed dust evac system. It consisted of four inlets about
4" duct with funnel collectors, each collector had an open/shut
capability so that only the station in use would be open. As each
branch met the next, the duct went up a size until the exit duct was
about 12" diameter. Total length was perhaps 40-50 feet ending in a
cyclone type of separator outside the building, driven by, I would
estimate, a 5HP elec motor. This was a large efficient system yet
there was a continual dust problem. But it beat changing filters.

If you have a larger polishing setup with multiple workstations its
best to have it in a dedicated ‘buffing room’ where it can be
isolated from the rest of the shop. Ours was about 600 square feet.
Remember to have a proper fire exit.

I think its better to exhaust to the outside rather than an indoor
filter but there are environmental concerns either way.


#3

Dear Daniel,

This conversion is quite accurate:

Estimated Microns = 14755/Grit
or
Estimated Grit = 14755/Microns

Your question is well constructed as a scientist, because the dust
you create is usually smaller than the grit
used in making the dust.

Use a filter that is finer than the converted grit size, so it will
catch the smaller dust.

Mark B
Fourth Axis
http://fourth-axis.com