miter saw dust

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Forum topic by ducky911 posted 08-03-2014 12:02 AM 1153 views 0 times favorited 6 replies Add to Favorites Watch
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237 posts in 2755 days

08-03-2014 12:02 AM

Topic tags/keywords: question


Shop down for a month now as I am working on dust.

Miter saw in a nice box enclosure with 6” pipe to DC also hooked up to my festool shop vac to port on saw. Really looked like I had a winner until I turned on my dylos meter. High reading as I cut. I made some modifications with no luck.

Than I started looking at the retractable blade shroud, it has lots of 3/4 inch holes pointed right at me. I taped them up and started to get much better readings.

So I see other miter saws with these holes and some without. Why are they there? It would have to be a pretty good reason to allow the dust in my face. This is the invisible dust, before I turned on the dylos meter I thought I had a winner.



6 replies so far

View bigblockyeti's profile


5093 posts in 1686 days

#1 posted 08-03-2014 06:30 PM

Not sure why they are there either, but it seems to make no sense. Have you tried running the dust port just aimed (approximately) into the enclosure without the vacuum and only the DC? I only ask because no vacuum can compete with the air velocity of a good DC setup. This could in theory improve your reads further depending on the design of your enclosure.

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17942 posts in 1822 days

#2 posted 08-03-2014 06:34 PM

The holes are there so that you can look down the blade and see where you are going to cut. If I didn’t have the holes I would not be near as accurate with my cuts.

-- Bill M. "People change, walnut doesn't" by Gene.

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598 posts in 4108 days

#3 posted 08-04-2014 02:19 AM

Having work in plastics injection molding, it cuts down on material cost.

-- Bill - Mesquite, TX --- "Everything with a power cord eventually winds up in the trash.” John Sarge , timber framer and blacksmith instructor at Tillers International school

View Loren's profile


10262 posts in 3613 days

#4 posted 08-04-2014 03:36 AM

I think they prevent dust from caking up inside the
guard. You can also see through the holes.

That said, I often bend at the knees to get a in-line
view or I might retract the guard with my thumb
to set up a cut. I don’t presently have a miter
saw so I don’t exactly recall what I used to do but
I did have a DeWalt with slots in the guard.

View ducky911's profile


237 posts in 2755 days

#5 posted 08-04-2014 07:51 PM


The holes are for the laser. I thought my laser was not working. I took the tape off and was not able to duplicate the high reading. Don’t want to put out misinformation.

Still testing

View Bill White's profile

Bill White

4903 posts in 3926 days

#6 posted 08-04-2014 09:35 PM

Some of the shop tools just don’t want to respond to dust collection. The miter saw is one of them.
I have an ambient DC that is used in conjunction with the vac.
Not the end all-be all, but it sure helps.


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