4" and 2" are good.
Have you got 2 shop vacs?
he's really gonna need to vent the motor...
I agree,fresh air through the motor is a good idea.
Tim as explained in another similar thread about a week ago, a vac works by floating the dust particles in an air stream. The dust you get under the table is mostly random particles. There is usually very little room between the bit and the table insert (by design as we change inserts to closely match bit diameter). Remember that all the dust (as in 100%) gets created above the table, it's just that a few collisions among the particles cause a few to head downward past the bit, through the narrow insert opening. So obviously the most effective location for a DC pickup is as close to the bit as you can get above the table. You can also put a pickup under the table to try and catch those random particles that head down too if you want. Also keep in mind that you need an opening leading to the DC hose that is at least equal to the cross sectional area of the hose or you won't have a sufficient air stream to float the particles in. So for a 2" hose you need 3.15 square inches of opening and for a 4" hose you'd need about 13 square inches of opening.
no cooling fresh to the motor either...
Correct. The Venturi Effect of the air crossing from one opening to the other causes the box to be at negative pressure. The principle is what makes a carburetor work or that tee that is used to empty water beds by pumping water through a garden hose. The water flowing past the tee opening causes a vacuum just inside the tee opening which pulls the water out of the water bed.
The slot at the top of the door directs an airflow across the router base, where it connects to the underneath of the table, to carry the dust out but there is still sufficient air to, and around the router body to cool it. It’s all about directing the air to where it is required.
I'm talking about providing outside air to the motor for cooling interdependently of what the DC is doing......
That still puts the enclosure at a lower air pressure than the air outside the box. You may be sucking across the base past the bit but where does the makeup air that is going through the router's fan come from? Air is being sucked out of the box with no intake near the fan inlet at the other end of the router.
the main reason I want to close up the open stand is for bit storage and shelves for other routers ect. would this pass muster for a snorkel if I box it in? I want it to pivot out of the way when I open the door to get to speed controls on the 1617 now and the 7518 should i ever go mast r lift.
