a couple of weeks ago i put a video up about the integrated dust extraction system in the
workshop which you can see going through here and i promised you a blast gate build video
so that's what we're going to do today we're going to make one of these bad boys let's get started
welcome to wood grain everybody the show where i turn beautiful things into firewood no wait if you
have an integrated system like this you need to be able to isolate all of the inlets individually
they work very simply it's literally a slider that goes across the opening and either opens
it up through the hole or blocks it up through there that way you can isolate
all of the system down to the one you're using and get maximum suction for that particular job
so let's get on to building it they're pretty simple but it's worth doing it properly
because the better job you can do the better suction you're gonna get so i've got here some
12 millimeter ply which is plenty thick enough you could even go thinner than this if you really
want to now i can't remember how wide i did the other one so let's just measure this one
let's see 15. sounds good to me so i'm just going to do 15 there i'm going
to probably cut these out on the table sauce so i don't really need to measure
the lines i'm just trying to get an idea as to where they've got to go
it's a good idea to when you cut these to make sure that when you slide them the grain of the
wood is going along each other not against each other because if you do it against each other
you're going to get more friction i like to have it so the slider can slide all the way through
and out the other side which means that any dust that gets caught up in the hole gets pushed out
the other side so it becomes self-cleaning i see a lot of them where they're only literally this big
and they just go like this and then they shut again like that which i don't think is as good
also this means that the if you can make sure the holes line up then you'll get a much nicer force
going through the middle so we need 215 square which is a pain because this is a 28 millimeter 27
centimeter board but we'll make do we're gonna need 15 centimeters i'll mark that out already
off the back of the blade i'm going to use a stop block because then it means i can just cut
two the same size without worrying about it
now these are going to be too long i should have taken the clamp off afterwards shouldn't i
so if you do do that bearing my knees have got to be square or need to be square
just line it up against the back of the blade and re-clamp it and then you should be good to go
so these are our off-cuts now i think what i'm going to do while i'm here is cut four pieces
just eyeball it up these are going to be the edges
so we can stick them together and also the handles on the end
the nice thing about using a table saw with a sled like this is that if the piece that you're
cutting does fly back it's only going to hit here so you're nicely protected but it's a useful thing
to be able to use something like this to stop the block from moving if you're getting too
close for comfort this is just a foam backed sanding block cost about 150. very useful
so i think i've cut the slider too wide what i should have done is measured it afterwards
which is what i'm going to do now and i'm going to just measure this against it now it needs to have
such a slight amount of room to slide you don't want it sticking against it
but we are going to sand the edges so so we can afford to lose some material in sanding
i'm just going to sand all the edges off to make to make it a nicer thing to handle
so we're getting to the stage where we can put this together when you're lining all this
up and laying this out make sure that you've got the grain running in the right direction
it makes life a little bit nicer and they slide a lot better i learned this after doing two or three
of the ones that i did here normal wood glue apply it to the pieces of edging don't go too close to
the edge because you don't want too much you want to avoid squeeze out if you can on the inside
i haven't forgotten to drill the holes by the way before you start wondering
i learned that the hard way that it was a lot easier to do it this way around
if you're finding value in this video please hit the like button down there
and subscribe i'm doing a video a week at least at the moment i tried to do a few little bonus
ones if i get the time children permitting i'm gonna nail this because i'm just lazy
and i can
now make sure you pull the slider out before you let them dry otherwise you end up
with a really really nicely made door stop so we need to let this dry and come back in a minute
well
all right we're dry enough now i need to mark the middle
that's going to give us our center
i'll clean these up a little bit but if you find that these are too tight sand them sand this piece
down a little bit and you'll find it'll loosen up but don't do it too much because you don't
want it to be too loose and they will loosen up over time so it's time to cut the hole out so a
little tip on this is to drill a pilot hole first all the way through that means that if you mess it
up or you need to go through with the hole cutter from both sides which i'll show you in a minute
you've then got a pilot hole that's perfectly in the middle and you don't need to worry about it
this is a variable size hole cutter i found it on amazon it was about 20 pounds i think i'll put the
link in the description it's the only one i could find which actually had a 68 millimeter cutter you
can't know if you're really brave use one of these personally they terrify me half death because
they're spitting around with large pieces of metal sticking outside so i prefer to use one of these
in actual fact the other type actually does a better job but for what we're doing this is fine
there we go nice now as i said before this obviously needs to go in and it's ever
slightly too small so we need to do a little bit of sanding i'm going to use my homemade spindle
sander which i made the other day to widen this hole out slightly so we can get this in
now i don't want to do the other one because i wanted a flush fit we'll see how we go
nice tight fit
now we need to glue in this piece here and i'm going to use a combination of ca glue
and i'm going to also silicone it around the edge so we can get to make sure we get a good seal
so you need to make sure that obviously when you put it in you're not blocking the hole
we're not blocking the slider from moving so slide it so it's shut and then
we can glue the edge
put the super glue in then slide it out
then if you've got activator spray it on
don't do that any super glue that's obviously slipped through to this side
will be glued to it as well a little bit on here but i can sand that off in a minute and that's
them pretty strong now this stuff is crazy strong but i noticed on a couple of them that i made
that you get a bit of a wiggle there so that's why i decided to glue this one in so i'm just going to
add a bit of silicone to this as well just as a precaution make sure we've got a good seal
not all silicones are equal try and get 100 silicone if you can
this stuff which is a fix all type is much much stronger than the stuff that
you get for your bathroom and your door seals your windows and all that kind of
stuff dry super super super strong so there we go we'll just need to put the handle on the other end
you can see that you've got a fairly clean line going all the way through there there's
a little ridge here but as the airflow will be coming this way that doesn't matter too much
so nothing will get stuck in the edges nothing will get jammed in there and stop it sliding and
then anything does get caught up around here as soon as you shut it it gets pushed out and
then ejected so it's self-cleaning now i've done about you but i think that is a much nicer thing
than those cilial plastic ones so have fun making your system i hope it works as well as mine does
if it doesn't let's have a chat in the comments and i'll see if i can help see you next time bye