On Thu, Dec 28, 2023 at 08:02 AM, <pierre.bourassa@...> wrote:

Thanks Aaron. How high yur ceiling need to be to accommodate it? My shop ceiling goes from 8 to 12 ft, but I planned to install the dust collector towards the back which is 8ft.

?
My ceiling is 9’ 2”. ?The Clearvue Pentz EF-5 is 106’ (or 102” with shorter 20 gallon drum). ? I literally have about 4” between the motor and the ceiling:



You can get a slightly shorter 20 gallon drum, but you still need 9 feet to the ceiling. ?You want at least a few inches above the motor for the cooling fan to operate properly. ?The Oneida 5HP collectors are 93” (which would give you 3” clearance). ?The 3HP V-3000 is 88” with a 35 gallon drum.

-Aaron

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Bills Clear View design is a more efficient cyclone than Oneida. If you could couple Oneida’s controller with a Clear View cyclone it would likely be a bit better than the Oneida.

The science of dust collection falls into the mechanical engineering field called fluid dynamics. As an engineer I studied fluid dynamics in college and sadly much of the “wisdom” on the internet is incorrect. I have a white paper I wrote that I’m happy to share with anyone who asks. The short version is this. The smallest opening the air much flow through and the suction pressure of the collector determine for the most part the actual CFM. ?Big mains connected to a saw with a small opening inside under the blade will do little to increase the CFM. The way to increase CFM to McRae’s suction pressure at the machine. Bigger duct does this but only to a point as low cfm in a big duct has effectively no resistance.?

I have an Oneida 5HP variable speed dust collector. ?It automatically increases the suction when the cfm is low to maximize. I tested the cfm at each machine before and after the variable speed controller and I approximately doubled the CFM at each machine. My Felder KF700SP has a port on the side that is about 5”. But inside the machine the flex hose is about 4” and the cast iron part under the blade has an opening that’s equivalent to about a 3” duct. ?I can run 5” mains or 10” mains to the machine and get almost exactly the same CFM. The way to increase cfm is more suction pressure. The 5HP Oneida I use can go up to 25” water gauge suction. Non variable speed 5HP collectors are more like 14-15”.?

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Yes, Bill Pentz has done a tremendous amount of research in the field of dust collection and the Clearview cyclone design was based off of Bills Specs. Most of the dust collectors sold do not capture the small micron dust that is hazardous to your health. ?Some of Bills cyclone designs and ideas have been copied by other companies like Oneida. ?I’ve spoken to him several times and he’s been approached by several of the common dust collector manufacturers for advice but when it comes to paying any royalties or other money for his ideas, they’re usually not interested in paying him. ?We mostly assume, as did I, that what’s out on the market for dust collection, is designed correctly and the specs are accurate but I think Bill has proven this not to be the case with some manufacturers. ?I believe he’s still reachable by telephone or email for advice. ?I usually make a small donation to his website for his time and advice.

Thanks Aaron. How high yur ceiling need to be to accommodate it? My shop ceiling goes from 8 to 12 ft, but I planned to install the dust collector towards the back which is 8ft.

Wow, super extensive. The more i read his stuff the more it convinces me that my setup need a big upgrade!

Hi Jacques. I am in Shefford QC, a bit far to come take a look, but maybe we could setup a quick facetime call if/when you have time.

Jonathan,

Do you have an STI file for this that you'd be willing to share?

Thank you,
Steve

I have had an Oneida 3hp Super Dust Gorilla for the past 15 plus years.? It has been awesome and completely trouble free.? The suction is great and I added a dust bin sensor and a pressure gauge to monitor it.??

I am selling that too!? Not because I do not love it, but because the shop got bigger and I wanted to only do it once.

I highly recommend Oneida, great customer service and great products.? Now having said that, I would not buy ducting from them, they are not the best price out there.

PK

Another vote for Clearview.? I had a RL125 and sold it.? The footprint was large, it didn't pull enough suction and the ducting port was low.? I installed the clearview in an insulated enclosure because it's noisy (95db).? The noise level is around 65db now.? Run as big of a main line as you can to reduce drag.? I ran 7" ducting to the drops but probably should have ran 8".? A lot of noise comes from the outlet.? Insulated ducting on the outlet side helped to reduce noise.?

On Wed, Dec 27, 2023 at 10:29 PM, jontathan samways wrote:

This is my solution

Hi Jontathan,

Did you drill the top of the reader to attach it to you metal bracket? or There is a reader version with screw holes on top.

Thanks,

Bill

On Thu, Dec 28, 2023 at 07:21 AM, William Henzel wrote:

A few months ago I purchased a Compass AH-3

Hi William,

Just to confirm, is the T version compatible with the Xroll slot or did you have to adapt the bottom piece?

Thanks,

Bill

I usually just lurk and learn, but An alternative to the Harvey clamp is from bridge city,?

I picked up a couple from lee valley a couple years ago and they work well on my k3 slider, just need to adapt them to fit the t track, I think I added a washer.?

Mark

Dan,

Are you still making and selling the zero clearance inserts?

Hi again Chris,?

Here is the one I purchased several years ago ...



$139 AUD at Beyond Tools.

Regards from Perth

Derek