I picked up a Dewalt DW715 12-Inch Compound Miter saw during a Black Friday sale. I’ve been doing some furniture building and figured it would come in handy.
See that little bag on the back? That’s ostensibly for dust collection. I may have been expecting too much out of it, but after my first dozen or so cuts on a set of 2x4s I went to empty the bag and there wasn’t anything in it. There was plenty of dust in the air and around the saw, though. So I decided to just hook up my shop vac to the dust port. Should be easy, right?
I did a little bit of Googling and found a woodworkers’ forum where someone said the dust collection port was 1.5″, so a 1.5″ vacuum hose should work. Well my shop vac has a 2.5″ hose so I just bought this without really paying attention to the description. Key bit: Use 1 1/2-inch hose with 2 1/2-inch accessories.
So I go to the home improvement store and pick up a Shop-vac 2-1/2″ to 1-1/4″ Conversion Unit. You might notice that it’s a 1.25″ adapter, not a 1.5″ adapter. Apparently, those are not made, but I figure it may fit the inside diameter of the Dewalt port. While I’m there, I also pick up a Shop-vac Universal Tool Adapter, because, hey, “Universal.”
So here’s the 1.25″ adapter:
Yeah….that’s not gonna work.
And here’s the “Universal” adapter:
Same problem, but different.
So now I’m getting a little bit frustrated. The next time I go to the store (we were doing a bathroom remodel so I was at Lowe’s or Home Depot like every 6 hours for a month), I pick up a 1.5-Inch Contractor Hose I’ll spare you the suspense and tell you now–that didn’t work either. The inside diameter of the hose was not large enough to fit over the dust port, and the outside diameter of the hose was too large to reliably use a coupler.
At this point I’m just trying shit. Clearly it’s not a 1.5″ port. Or 1.5″ hoses aren’t 1.5″ ID or OD.
I go order a 1.25-Inch hose. The wand on the end is comically large, but it fits. Sort of:
The dust port is actually in the arm of the saw, so it rotates. When the saw is all the way up, the wand can fall back. When you go to use the saw again, this can happen:
So now I do what I should have done in the beginning:
And the inside diameter:
I take my calipers to the store, go to the plumbing aisle, discover that 1.5″ PVC Pipe fittings have an inside diameter of about 1.66″ to accommodate wall thickness. I buy a 1.25″ Schedule 40 male adapter, a 1.5″ x 1.25″ male adapter, and a 1.25″ slip coupler. I figure I can use one of my hoses with the male adapters, and just use some 1.25″ PVC pipe if I really need to.
Well. It turns out…
The corrugated end even fits over the ridge in the middle to keep it in place!
And the good news, of course, is that I’ll never need another adapter again. I already have them all.
*The original version of this post incorrectly stated that a 1.5″ coupler was used. This is what I get for hitting publish before checking my receipts.