wall chasing dust collection

[mickthetree]

Evening all

Currently renovating a house. Taking some walls down and chasing out others for pipes and electrics.

I have a stihl saw and an angle grinder with diamond blades. They cut very well indeed but my goodness they make one hell of a mess!!!

I built a drop box this morning from a 70l dustbin and some 40mm waste pipe. It picks up small waste really well so very handy, but the fine dust travels straight through to the vacuum and blocks the filters.

I have angled the inlet so the waste is fired around the outside edge of the bin so it creates a vortex. When I took the lid off the air was still spinning so that bit is working.

The outlet to the hoover is at the top in the center.

I have tried fittings some baffles and some bits to angle the air down but nothing seems to be working. I tried fitting a filter over the exit but that blocks straight away.

A water spray inside might work but would make an awful mess.

I should have taken some photos but any suggestions as to what I could try? Or am I on a looking streak trying to filter the fine dust?

Cheers

 

[carlb40]

Can you fit paper filters over the filters in the vacuum? Or buy a cheap /rent a bagged vacuum as the bags will be part of the filter system and should stop most of the fine dust.

 

[mickthetree]

Cheers Carl. I did notice today that my shop vac has a material filter with a paper bag over the top. I was going to try using that next.
I did use an old wet dry vac in my old shed which seemed to cope very well with dust, but this dust is very fine (and so much of it!)

 

[kostello]

What you need is some water in the dustbin to catch the dust....

The inlet to thge bin from the tool needs a pipe that drops down into the bin and stops about 3\4 of the way down. You fill the container with water so that it nearly reaches the pipe and the dust gets sucked into the container and his the water and is trapped...

A poor explanation but if you look here...

http://www.thegaragegazette.com/index.php?topic=65.0

.. All is explained


Edit for spelling

 

[blackrodd]

Even if you could find the water cooled stuff now, it still left a nasty mess.
I had to cut the floor to replace the "dip" pipe for my well last summer, so,
I used my Stihl leaf blower and fired the dust right out the door, maybe you could improvise as it has plenty of power.
Every home should have one! HTH Regards Rodders

 

[hanser]

Why not hire a conduit wall chaser? About £40/day.

 

[mickthetree]

Local tool hire is £70 a day plus diamond blades. Doesn't include any dust collection!!

I've seen a nilfisk Hoover at screw fix comes recommended for wall chasing. Would be very handy elsewhere so might have to resort to one of those if I can't deal with the dust.

 

[kostello]

See pm

 

[MMUK]

Personally, when chasing masonary with a cutting disc I use a powered supply of water along the cut through 3/8" airline hose. Just a cheap rotary pump on my cordless drill, pumping from an old 25l oil container.

 

[gregmcateer]

Don't know your budget / size of the job, but I use this;

http://www.screwfix.com/p/sparky-fk302- ... 240v/80879

hooked up to a bog standard Henry vacuum. Works a treat, (though give the vacuum a wee braek between each new chase, otherwise it gets a bit hot under the collar!)

HTH

Greg

 

[hanser]

Local tool hire is £70 a day plus diamond blades. Doesn't include any dust collection!!

Check out Jewson's -they do a Hilti chaser for £49/day (on line price) inc VAT.

http://www.jewson.co.uk/tool-hire/concr ... hine-110v/

 

[mickthetree]

Cheers Greg

Break through tonight!!! Managed to get hold of a Dyson 08 animal today. MIL WAS GETTING RID AS IT WAS 'broken' think she wanted an excuse to buy a new one ;-)
Combined with Big Bertha (the drop box) it works great.
Drop box collects all of the big lumps and the Dyson collects all the dust.
I've not used it for chasing yet but will let you know how that goes

 

[mickthetree]

Wow! Thanks Hanser, that offer from Jewsons looks excellent value

 

[kostello]

Not sure if it is of any interest but the local lidl in Wycombe has wall chasers for £70 today.....

 

[Ed209]

I got a cheap one from screw fix approx £65 some years ago
With the intension of using it and the selling it on half price
But never got around to advertising it. Since moved so need it again now
Lot less dust when coupled up to my Henry than a grinder
Only thing is you can't go to approx top 6" if like me you live in bungalow have to do that bit with cold chisel or grinder
Mine was a pain because the walls were block apart from top row engineer bricks