Thread: Hafco DCC-310 - Dust Collector & Cyclone Separator modification upgrade?

Hi Bob,
One more thing, what do you think of air filter room cleaners such as this:
https://www.timbecon.com.au/extracti...leaner-1000cfm
Sorry, can't seem to make the hyperlink work
Thanks Rob

Originally Posted by Baddabing

Hi Bob,
One more thing, what do you think of air filter room cleaners such as this:
https://www.timbecon.com.au/extracti...leaner-1000cfm
Sorry, can't seem to make the hyperlink work
Thanks Rob

Room air filters (RAFs) are useful if you work in specific ways and it very much depends on what other forms of dust extraction you are running.

RAFs alone are generally inadequate unless you are just working with hand tools and don't do a lot of sanding.
Simple exhaust fan Ventilation is usually faster and cheaper than an RAF but remember an exhaust fan does not remove the dust from the external air being dragged into the shed so you always have some dust in the air. RAFs are very useful if you are not especially making dust but want to remove as much dust as you can from shed air prior to application of of finishes to projects. (That's what I use mine for)
RAFs cannot keep up with the fine dust generation produce by most machinery.
In a small DIY shed where you have AC and want to keep your cool air, An RAF in combo with a modified 2HP DC system is a possibility.

One time where I saw an RAF keep up with a Machine was during a one hour Turning demo, in fact the RAF was slowly making the air in the lecture hall cleaner than when we arrived (I had my particle counter running) which was replay impressive. However, the highly skilled instructor had pre-roughed out his pieces and was only demonstrating the key cuts to be made when turning a goblet or two. He did a considerable amount of explaining in between the cuts, was using extremely sharp tools and did not use any sand paper.
If you operate like this you too can just use an RAF alone.

Thanks, I was thinking of running in addition to your earlier suggestions. Was just unsue if it eas overkill or yhat they dont really work. I like the idea of running them during breaks and at end of day for a few hours just eliminate the dust the 3hp dust extractor misses and what nlows in from outside.

Well the dust extractor has arrived, now to assess if I will modify it!

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wont work laying on its side in boxes, get your finger out mate

33 degrees and 70% humidity, in the shed ever hotter, determined to get it together.

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Next part - the cyclone complete

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All connected up and ready to go!

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can you fit a small block n tackle above the cyclone? Id imagine lifting that from the floor (when emptying bin) wouldn't be easy or light. But, 3 bits of chain around the top of the cyclone, hooked up so when needing to empty bin, undo clips, lift off with block n tackle, then reverse process.

Hi Tonto,

Not a bad idea, it is not overly heavy but cumbersome, the lower bin is on castors and I have now put a bag in it.
Once I work out its final position I will look at those issues.

Regards
Stephen

When you decide where you are going to put it permanently and want to get the most out of it.

Mount the cyclone to the wall or in a stand so the bottom barrel has to be lifted to the lid. Put something like a machine mobility cart under the barrel so it lifts it up to seal and drops onto the castors to remove for dumping.

Mount the impeller and motor above the cyclone so the air has a straight path up from the top of the cyclone into the impeller. That removes the performance robbing hose between them.

Either orientate the exhaust of the impeller to vent straight out the wall of the shop without using the filter. That's the best but if you can't.

Or orientate the exhaust of the impeller and the filter and bag assembly so the air flows straight into the ring with a short straight piece of hose. That removes most of the hose and its bend. It does make it harder to get to the filter to clean it though.

Run 6"/150mm duct rather than the flex hose and try to keep the run as short as you can. Ditch those two wyes as the air doesn't flow well through them.

Finally mod the impeller housing like the sticky Bob wrote.

Pete

Originally Posted by QC Inspector

1) Run 6"/150mm duct rather than the flex hose and try to keep the run as short as you can.
2) Ditch those two wyes as the air doesn't flow well through them.
3) Finally mod the impeller housing like the sticky Bob wrote.

Yep - Yep and YEP.

When I saw all that flexy I shuddered to thing of the flow losses.

To convince you to remove as much of the Flex as possible take a look at this.



CV is Clearvue supplied Flexy, HT is a very stiff Temperature resistant flex, CT is the softer Carbatech flex and TC is the stiffer Timbecon Flex.
One caveat I should add is that this test was done using a 3HP, 13" impeller machine so I would expect the effect to be less dramatic on a smaller DC such as yours.
Also the effect is not necessarily linear, ie if you double the length the losses are not necessarily double, usually they are less than double.
Either way you can see the effect of flexy is very significant.

A thread where I test flexy, junctions etc is here. The first page or so is about calibrating air flow meters but the Flexy and other testing starts at Air flow calibration measurements

Hi Stephen, I have the same Cyclone on my Leda 2hp extractor. I took off the twin inlet from the extractor and the plastic outlet from the cyclone, there is a metal outlet of various sizes on top of the cyclone. I chose the largest flexible pipe I could get and joined the extactor to the cyclone, I think it is about 5”.

This flexible pipe goes from the bottom of the extractor to the top of the cyclone, about 1500mm, and then does a 180 degree turn around to fit into the cyclone, not ideal.

I also fitted a pleated filter to my extractor to replace the cloth bag which leaked like a sieve. This was possibly unnecessary because the cyclone removes 99% of of all dust and shavings from my machines. I couldn’t be happier. Since fitting the cyclone I have not had to empty the extractor bag but I have emptied the cyclone twice. An easy job.

I use both 100mm inlets on the cyclone and I attach them to my; planer, thicknesser, bandsaw, table saw and sander using a 65mm adapter. I occasionally have two machines attached at the same time.

I find this setup perfectly adequate for my 12m x 6m shop.

Hope this helps ease your mind on your choice of setup
cheers
steve

Hi Steve,

Thank you for the information, good idea on increasing the pipe size between the cyclone and extractor.
I am just weighing up my options to get the best out of it.
When using 2 x 100mm flexi connected to 2 machines, does it collect all the chips/saw dust?

Regards
Stephen