dust extraction machines short list

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mac1012

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i think i getting my head around this dust extraction choice

after doing a bit of research into the different machines and capabilities i come up with the following conclusions

some machines offer 2 stage filtration and some 3

the machines like fein and trend offer 3 i think the nilfisk 25-21 aero offers 2 the difference being a cloth or nylon filter between the bag and cartridge filter , the bag is first stage the nylon cone filter is second or pre as some call it and the final is the cartidge the second stage is supposed to ease the work load on the cartridge filter and make it more effective

i have seen some people say on here they dont use bags but i cant see how that would be effective with fine dust and sureky it would ioverload the cartridge somewhat ?

as for the difference between two and three im not sure , i guess the nilfisk would be as effective as the trend even though it hasnt got a middle filter provided the cartridge is up to scracth.

i am sorely tempted by the bosch l 15 on offer at axminster for 1oo pounda approx even though only 2 stage it looks pretty good for money

i am doing research into not just sucking power mut how much air volume they can deal with

the tran and fein look good for money both very similar in function the feins are on offer at axminster and i found the trend 30 for 199 on net

trend are the best company for explaining the filter process and there catridge is down to 0.3 microns and claim suitable for mdf

a lot of companies are reluctant to give info on suitabilty i not seen any apart from trend state what there machines a re capable of deaking with in dust terms like mdf or microns or any tech info on filters

bosch state L rating for the 15 i wiuld guess the trend must nearing towards m if it can handle mdf safely (not that i work in mdf)

so the search goes on but feel a bit better about making a descision =D>
 
Dust extraction seems to be a bit of a dark art and I am inclined towards thinking that the manufacturers have no interest in making the matter clear.
The camvac claims clearance down to 0.5 micron and uses acloth filter, paper bag, and another cloth filter. No cartridge.
 
yes know what you mean , i think maybe because of litigation ?

i only have small work shop with includes base model hegner a small ax bandsaw a bench mounted belt sander and a router and palm sander so i was looking at these type of extraction plus would be handy for workshop vacuming i like the look of the fein ones but the trend seem a bit more clear on their info i sure the fein would cope with fine dust but a lot depends on the cartridge trend do a 12micron for general and a fine o.3 i seen the trend on d and m tools with the fine dust model at 199 and i seen t for nearly 300 at other places even though the black trend dosent look as funky as the fein !!
 
although i have seen a long life fein nylon filter that says replaces bag and catridge ? mmm not sure how that works to be effective for fine dust unless anyone can enlighten me #-o
 
It may also be worth considering the way you deal with the vac exhaust . With my camvac I have a 2.5 metre flexi pipe on the exhaust to quiet it down. If that were going outside the workshop ( through a vent or window or somesuch ) then maybe the true filtering size wouldn't be so important.
 
mac1012,

Your approach seems Ok but could be better. These small vacuums are best suited to small dust makers eg, jig saw, sanders, etc etc. A bandsaw may be a bit too much for them.

An option you have not mentioned is to use a small cyclone such as the ones sold by Cyclone Central at http://www.cyclonecentral.co.uk/ . You could then use a Fein or Trend or even a used bagged DC or even a Record or Camvac.

Cyclones are especially good at capturing small particles, dumping them into a container but letting the mostly clean air pass into the eventual DC machine so that it deals with much less then expected.

Al
 
yeah i take your point i was leaning to that kind of thinking i think the small vac would be ok for my hegner but not for small bandsaw i am probably going to get the neumatic v750 from axminster look a bit more powerfull and i can buy the step down hose for the hegner annd will cost about 260 for the whole lot , although have to say the hose sizes are bit confusing as the hose is 56mm i think and the bansaw is 60mm i going to ring axminster and see what they advise to fit
 

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