Cheap Extraction for various tools and portable Dust Extraction

Hi ALL,
I have just purchased a DWS778 Mitre saw - due tomorrow (Wed 5th June 2019)
I already have a Dewalt Cordless , Circular Saw, Planner , Jig Saw , and a 625 Router

so now I'm thinking of a simple CHEAP dust extraction.
I was looking at the Dewalt Universal Bag, but a lot of reviews say it does not fit

I have a Henry Vacuum Cleaner I use in the garage , so I'm thinking of hooking this up to a DUST BUCKET type of thing.
Screwfix have one , good reviews , and i have seen make your own on youtube
however, screw fix dont seem to have any https://www.screwfix.com/p/triton-dust-collection-bucket-23ltr/3754r

any suggestions
I will be taking the kit over to my Son's , Son-in-law and DIY around the home

eta, good evening.

When my son had a workshop, he [shall I call it] "modified" his Henry's flexible hose to fit on to static machines, a router table, a band saw, and a surfaced / planer. using Gaffa Tape [Other such tapes are available?]

We found that it worked very well, but like all such kit, any Flexi hose can at times "get in the way" when using a hand held machine?

At times he even when using say the Dremmel he would fix the end of the Flexi on any support on the bench pointed and close to the vice he was working at, that also was fairly successful?

Ken.

Thanks,
I read that the fine dust would destroy a domestic cleaner very quickly
How did it the Henry manage the fine dust and did it last ?

The biggest problem with domestic vacuums is that they suck up dust then blow 25% of it straight out the back because the filters are nowhere near good enough to trap the finest dust - the stuff that does the most damage to your lungs. Using a pre-filter cyclone overcomes a lot of this as 90% or more of the dust is "spun out" of the airstream before it ever gets near the vacuum. another problem with domestic vacuums is that they aren't designed to be used for hours on end - they get very, very hot.

eta, good evening again.

Henry seemed to cope well, no indications when in use in the workshop of a "haze" of dust, Yes there was a gradual build up on unused surfaces of wood dust, but nothing I would not expect to see in such an environment?

As for longevity, I now have said Henry, works very well, still has a powerful suction.

Henry was used for about 2/3 years?

Ken

Well, I have now got 2 bags from Dewalt, very very small, not sure they will last long.
I also purchased 5m of henry pipe and found that a standard 40mm (i think thats the size, had various in the plumbing box) drain connector fitted onto the dust outlet, and that the Henry hosepipe attachment fitted very tightly into a standard drain pipe.
I also have the HEPA flow filters for the henry, so i may give it a try next time using.
I should make a cyclone , but it will get very little use, just a DIYer

Thanks to everyone who replied , any suggestions welcome

JobAndKnock said:

Using a pre-filter cyclone overcomes a lot of this as 90% or more of the dust is "spun out" of the airstream before it ever gets near the vacuum.

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The cyclone may well catch 90% of the dust but it only traps the coarse stuff, the fine (read: dangerous) stuff passes through the cyclone and will then possibly pass through the vacuum bag and filter.

AFAIK the primary reason for using a cyclone is that you spend less money on expensive dust extractor bags. The bulky wood chippings can be deposited directly in to cheap plastic bags.

I did consider buying a Dust Deputy cyclone to go with my Festool dust extractors but given that most of my work is sanding filler/paint it would have been a waste of money.

Some cyclonic systems might even be dangerous. For years Dyson denied the importance of HEPA filters, Dyson even argued that HEPA was a marketing gimmick (kettle calling the pot black). Researchers discovered that the Dyson cyclones smashed pollen particles into smaller particles which simply passed through the Dyson filters, potentially making Dysons more dangerous than many bagged vacuum cleaners.

opps said:

The cyclone may well catch 90% of the dust but it only traps the coarse stuff, the fine (read: dangerous) stuff passes through the cyclone and will then possibly pass through the vacuum bag and filter.

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Well, for a while on one job where we had a static cutting room, I did set-up a home-made Pentz-style cyclone in front of a Bosch GAS50M extractor. Prior to that Heath-Robinson set-up we were emptying/replacing the bags every day to two days (circa 40 litres of mixed wood dusts - MDF, plywood, chipboard, softwood, hardwood, etc). With the pre-filter cyclone we were still emptying the drop box every day or two but the filter bag remained essentially empty other than a few (table) spoonfuls of dust extracted over a 2 week period. The main filters showed no signs of additional clogging either. That would seem to contradict what you've stated. Only reason I've not used the cyclone since is that all my more recent jobs have required a more mobile set-up (and a lot less heavy cutting), so the size of the combined set-up is just too much to drag round site

opps said:

Some cyclonic systems might even be dangerous. For years Dyson denied the importance of HEPA filters, Dyson even argued that HEPA was a marketing gimmick (kettle calling the pot black). Researchers discovered that the Dyson cyclones smashed pollen particles into smaller particles which simply passed through the Dyson filters, potentially making Dysons more dangerous than many bagged vacuum cleaners.

Click to expand...

Any links to articles/research work? I'm curious about this, specially as having read through Bill Pentz's site on DX I'm rather keen on cyclonic extraction (but with Class M exhaust filtration). Not looking for any sort of argument - just interested in following-up on what might be wrong with the pre-filter cyclone argument

JobAndKnock said:

The main filters showed no signs of additional clogging either. That would seem to contradict what you've stated.

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When I mentioned the filter clogging, I was referring to the use of domestic/rubbish vacuum cleaners when used in conjunction with a cyclone. Your Bosch GAS50M was happy dealing with the coarse and fine dust. In no way was I intending to suggest that it would no longer be able to deal with the dust that it could previously deal with.

With regard to the Dyson and the increased risks relating to pollen.- I will try to find the link. It is however well known that "Storms can spark asthma symptoms because they smash pollen into tiny bits that go deeper into your lungs".

Going back to your set up, I honestly do not know if some of the particles in your airstream are smashed into smaller particles. If they are, it is possible that they would be so small that they would pass through your filters and not leave any visible residue. In no way I am being critical of your set up, I was criticising Dyson's lack of probity. They knowingly marketed their vacuums as being "allergy friendly" when they were in fact potentially more dangerous than non-cyclonic machines with the same filter rating.