Oneida Super Dust Gorilla #2: Performance Testing

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Blog entry by Redoak49 posted 07-30-2016 10:35 PM 3574 reads 1 time favorited 6 comments Add to Favorites Watch
« Part 1: Assembly Part 2 of Oneida Super Dust Gorilla series Part 3: Shop Duct and Hose Testing »

Several months ago, I purchased the Super Dust Gorilla 5 HP from Oneida. The specifications on the Super Dust Gorilla were

• 5 HP US made Baldor motor – 19.5 Amps
• Backward Inclined Cast Aluminum Impeller – 15”
• Max Performance 1860 CFM at 2.5” SP
• 8” Inlet
• HEPA MERV 16+ Filter
• Filter 110 sq. ft

Given my new dust collector, I wanted to see how well it really performed compared to the Oneida performance curve. I used a great set of tools loaned to me from another woodworker—-

• Dwyer 471 Digital Thermal Anemometer
• UEi 151 Digital Manometer
• Clamp ammeter.

To do the testing, I installed two 24” lengths of 8” duct to the 8” inlet of the dust collector. I also built a cone to insert into the end of the duct using an 8” funnel mounted on a ½” threaded rod with a handle on the end. (It would have been much better to have a longer length of straight 8” duct. However, with my dust collector in its current position, this was not possible.)

All of the testing was done in one location as shown in the following schematic.

The flow through the dust collector was controlled by using a funnel which could be adjusted in and out of the 8” duct. It was easy to set up various conditions and collect the data.

The instrument used to measure the flow was the Dwyer 471 Thermal Digital Anemometer. The probe was inserted through a small hole in the bottom of the duct and then flow measurements were taken at six points across the diameter of the duct. The locations of these measurements were determined from the literature and used to make standardized measurements. To insure that the measurements were taken in the same place and were repeatable, a stand was built to hold the probe and properly position it.

There are two holes in the tip of the probe. One is the hot wire anemometer and the other measures temperature. The probe must be kept perpendicular to the air flow to get good readings. The static pressure was measured close to the flow measurements and done with the UEi 151 digital manometer.

Measurements were taken at full open and full close of the duct and at intervals of 1” H2O static pressure. The entire set of measurements was repeated to assure that I had good data.

The data was plotted on a graph along with the data from the Oneida website. My measurements (diamonds) were lower than those provided by Oneida (squares) by about 200 cfm at maximum air flow. While the flow rates are very good, I expected my data to be closer to the Oneida data and have written them to determine what might cause the difference.

Velocity measurements ranged from 1100 fpm to 4700 fpm in the 8” duct.

Current measurements were made with the clamp ammeter for maximum air flow and for no air flow.

• Fully closed with minimum air flow – 7.2 amps
• Fully open with maximum air flow of 1650 cfm – 12.5 amps
I made measurements of the filter pressure and static pressure and various flow rates. Filter pressure ranged from about 0.5” at high static pressure with low flow rates and about 3.0” at low static pressure with high flow rates. This gives me a baseline for knowing when my filter is dirty.

There are a number of people who measure pressure on the filter side of the dust collector….between the filter and the impeller. This lets them have an idea of when the filter is getting dirty and needs to be cleaned.

At high flow rates, the filter pressure is higher than I would think best for the system and maybe a result of a smaller filter than some other similar dust collectors. This high filter pressure could lower the maximum achieved flow rates.

6 comments so far

View Arlin Eastman's profile

Arlin Eastman

4549 posts in 3805 days

#1 posted 07-30-2016 10:42 PM

Not knocking your unit but for the price they want for them it makes me want the ClearVue which is a lot cheaper and works better in my view.

-- It is always the right time, to do the right thing.

View Redoak49's profile


5391 posts in 3233 days

#2 posted 07-30-2016 11:02 PM

Arlin … I looked and compared prices with the CV1800 and when you consider everything it was very close. I was a bit put off that ClearVue does not provide a performance curve. The last issue is that I did not prefer the plastic cyclone bodies and parts. I like the solid steel of the Oneida. My Dust collector sits in the garage which gets well below zero in the winter and have concerns with the plastic getting hit.

I think that in terms of price and performance there is little difference.

If you have some actual performance data and experience with the ClearVue, it would be great to post it side by side. That gives people actual data instead of just preferences.

View AandCstyle's profile


3306 posts in 3501 days

#3 posted 07-31-2016 10:02 PM

Red, I am impressed with your testing. It will be interesting to see the response from Oneida.

-- Art

View Toddler's profile


3 posts in 4603 days

#4 posted 01-12-2017 10:39 PM

I was torn between the clearview and the SDG too. I ordered the SDG today after reading everything I could find online. The total cost was about $200 more than the clearvue would have been, but it includes a 35 gallon bin, a bin full sensor, and the bag liner. The clearvue wouldn’t have those items. I priced it with a remote from both. I’ll be building my own stand. The clear vue would have included a wall mount, and if I’d wanted it from oneida, that would have added another $100.

If I want to, I’ll add another 200’ of filter area by adding a Wynn under the standard filter.

Thanks for posting all of this RedOak. It is appreciated!

View japanesewoodworker's profile


75 posts in 4296 days

#5 posted 08-30-2018 10:39 PM

Thank you for these two BLOGS.

Can you tell me, “How BIG is your shop ?” , and what this the farthest wood working tool from this dust collector ?

Based on my experience. The farther you are from the dust collector, the lower the SP, increased distance = increased friction from the ducts and bends also play a major factor in decreasing capture velocity.

Thanks for sharing.

View Redoak49's profile


5391 posts in 3233 days

#6 posted 08-30-2018 11:42 PM

My shop is about 35 feet long. Of course, increased duct length is increased static pressure. It is easy to calculate using Bill Pentz worksheet.

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