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Dust Extraction

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morpheus83uk:
Hello,

I was at the Harrogate Show a few weeks back and I was looking at dust extractors. The guy at Lumberjack Tools was pointing me to their 1200 drum extractor and away from the larger bag / filter. He was telling me not to waste my money with the larger extractor as the suction would be better and the drum extractor and better for a lathe.

I was also looking at the Charnwood W796 professional extractor so I could run it all day with the 1 micron cartridge filter.

What would you guys recommend and why?

I would have thought that the larger charnwood would be better for the fine particles when sanding and the drum would be better for things like when using a thicknesser and chip collection. I could be completely wrong though! Hence asking the experts!

Thanks

James

Twisted Trees:
A big consideration on the Charnwood and probably others as well is can you lift and empty the drum? what makes the suction is the motors and on the Charnwood the same suction option is available on all sizes, so balance the size of drum against the quantity of shavings and what you can actually lift to empty.

morpheus83uk:
Ahhh ok so if I can lift the shavings on the charnwood bag when full then the suction would effectively be the same or better but not worse?

I was also thinking of potentially a cyclone as I believe they keep the filter happier for longer as well as the impeller as it's not getting hit by chippings that are going in there as they would be filtered out by the cyclone. If this is correct does anyone recommend any cyclones which would be suitable?

My other question is does CFM matter? As looking at both the charnwood and the lumberjack the CFM is much larger on the Charnwood so I would have thought its better as it's moving more air so able to collect more dust / shavings?

Thanks

James

Twisted Trees:
Sorry on my last answer I was thinking of the CamVac as the alternative not the Charnwood!

There are 2 varieties HPLV HVLP

High Pressure Low Volume is the extended vacuum cleaner style extractors
High Volume Low Pressure is the Chip extractor style

Just to add to the confusion there is also the air filter option e.g. the Record Power AC400

In the main the HPLV is the easiest to use, as it can be used with any size hose, and reducing the hose just increases the suction, while the HVLP requires that the hose is the same end to end.

If you are going for the cyclone route then that would work best with a high pressure system, would not be much benefit on the Charnwood low pressure and may even make it ineffective. 

In my experience the most important factor is noise if it is too noisy you will be less inclined to turn it on.

Sorry no easy answers for you, I have a system that is in an external shed runs through ducting and uses a 6" input cyclone to dump shavings and dust direct into a garden waste bin I also have a large capacity Jet Air Filter and the system really doesn't do a very efficient job. Go to commercial premises with commercial level dust extraction and there are piles of sawdust in every nook and cranny.

So whatever you choose view it as a helper and still protect your lungs with a mask or personal air filter.     

Paul Hannaby:
I have a 4" cyclone in line with my 4" chip extractor and it works just fine. Nothing finds its way into the extractor bag. Many of the commercial cyclone systems are combined with HVLP systems.

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