Hilda, Focse, etc engraver/dremel anti-dust shield.

This is a good cheap device but when working with wood, it covers all the room with dust because the cooling fan makes a strong air flow to the direction where the sawdust falls to...

My solution is to redirect the blown-out air to the opposite direction using a special shield. This anti-dust shield does not prevent you from installing a transparent protective cover right after it. When the transparent shield is not used, it's better to move the anti-dust shield farther from the vent holes to allow the air pass through the holes easier.

The thickness of the shield is only 1.2 mm and it is needed to reduce its weight (17 grams only). Don't worry, it is strong enough when printed with PETG because it bends and doesn't break.

I attached a FreeCAD source file for customization, as different engravers may have a slightly different diameter. You should measure your one with a caliper before printing, and if it is different, edit Sketch009 to set your own diameter. I used 37.2 mm diameter in the sketch for 36.8 real diameter (+0.4 mm), but I think 37.1 would be better (+0.3mm). It also depends on your 3D printer, so print a few initial layers, stop the printing and test if the diameter of the printed ring is OK for your engraver.