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What dust extractor to go with? What is best? Hilti, Festool?


Fatandre

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The filters and blower are basic tech until you get into large systems where you get pulse jets and Torit systems. The thing is there is a balance called the air to cloth ratio which needs to be under about 4 and the pressure drop needs to be between 2 and 8 inches: for ANY filter. If air flow is too low or high it doesn’t work: Also you need a certain CFM based on the opening it is sucking air through, the gaps around the tool. If it’s too much it won’t capture the dust and you are forced to use a bigger blower which means a bigger filter. Just saying so you get what the technology limits are.

So the best dust collector is the one built specifically for a specific tool. Everything else is meaningless. Using a Festool dust extractor on a Dewalt grinder is not a good idea.

With saws it’s a different story. They have built in dust ports and just take any shop vac. Shop vacs come in a variety of CFM but the saw manuals give a minimum CFM. More is not better. If you are above minimum you get maximum collection efficiency.

Buying super high filtration filters kills air to cloth ratio over OEM filters. 3M is famous for selling overpriced filters that reduce system performance. Don’t do this. Especially with concrete and drywall dust that plugs filters quickly.

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On 6/26/2020 at 5:15 PM, paulengr said:

The filters and blower are basic tech until you get into large systems where you get pulse jets and Torit systems. The thing is there is a balance called the air to cloth ratio which needs to be under about 4 and the pressure drop needs to be between 2 and 8 inches: for ANY filter. If air flow is too low or high it doesn’t work: Also you need a certain CFM based on the opening it is sucking air through, the gaps around the tool. If it’s too much it won’t capture the dust and you are forced to use a bigger blower which means a bigger filter. Just saying so you get what the technology limits are.

So the best dust collector is the one built specifically for a specific tool. Everything else is meaningless. Using a Festool dust extractor on a Dewalt grinder is not a good idea.

With saws it’s a different story. They have built in dust ports and just take any shop vac. Shop vacs come in a variety of CFM but the saw manuals give a minimum CFM. More is not better. If you are above minimum you get maximum collection efficiency.

Buying super high filtration filters kills air to cloth ratio over OEM filters. 3M is famous for selling overpriced filters that reduce system performance. Don’t do this. Especially with concrete and drywall dust that plugs filters quickly.

concrete grinding tampa

Festool is probably hard to beat. Some of their bigger models have a feature that will automatically shake the dust bag to maintain suction- but a special bag may be required. Festool/Tanos Systainers will attach to the vacuum for transport. I have used a CT36, and it works great. Never have had a problem with bag clogs or dust not completely filling up the bag. It isn't unusual for the bag to look like the cavity it is in when it is full of concrete grinding boston. It won't suck up big debris like a typical "Shop Vac". The only Festool disappointment I have had has been with their dust cyclone system. Bought it, tried it, sent it back. I had zero success with it when trying to catch fine drywall/sanding dust- but it worked great with planer shavings. Not working with the fine dust was a deal breaker for me.

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On 7/10/2020 at 1:27 AM, Fatandre said:

Decided to go with Starmix

Starmix is great, their cordless vac can be used either with one single 36V battery or 2 x 18V batteries, the design of battery slots (one for 36V battery and two for 18V batteries) was amazing to save space. 

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