All Replies on Hose requirement to connect 3HP dust collection motor to Dust Deputy XL?

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View aki's profile

Hose requirement to connect 3HP dust collection motor to Dust Deputy XL?

by aki
posted 10-17-2018 04:53 PM

5 replies so far

View Dustin's profile


707 posts in 1588 days

#1 posted 10-18-2018 12:05 PM

I can’t say for certain, but that seems a little odd. I have the metal SDD, and while my motor assembly is substantially smaller (HF unit with upsized impeller), the only time I’ve had poor separation is when there was a leak I was unaware of in the connections or chip bin.

-- "Ladies, if your husband says he'll get to it, he'll get to it. No need to remind him about it every 6 months."

View bigblockyeti's profile


6723 posts in 2568 days

#2 posted 10-19-2018 02:17 PM

I would recommend strongly against turning the motor on its side if you can avoid it. Doing so will only decrease the effective power of your DC due to the additional resistance of the airflow path. As little distance and as straight as possible will give maximum performance.

-- "Lack of effort will result in failure with amazing predictability" - Me

View MJCD's profile


605 posts in 3219 days

#3 posted 10-19-2018 09:13 PM


Simply, this doesn’t make sense to me…

I assume you’re discussing the Super Dust Deputy (SDD); as the smaller ‘Dust Deputy’’ is intended to sit pre-vacuum cleaner. Cyclones are inherently self-regulating; that is, only so much air can be pulled through a 4” or 5” or 6” opening; with inherent line static pressure and pressure-drop getting in the way: the line opening constricts the throughput. Putting an outsized impeller and motor onto a too-small airflow (limited by either the run size (6” or 8” main runs), or too-small a coupling hole) will serve to ‘starve’ the impeller. – I’m not sure I explained that clearly…

I used the SDD for years connected to a 2hp motor, and it worked great.

View Brazz04's profile


43 posts in 1714 days

#4 posted 10-20-2018 05:59 PM

There had to have been a leak somewhere, probably at the collection bin. I have the SDD XL and a 3HP motor with no issues and it is connected directly to the top of the SDD XL. Once you have your system together, to test for leaks, get a candle and light it for a bit, then blow it out and use the smoke from the wick to go slowly around the dust collection bin seal, you’ll be able to see the smoke get sucked in if there is a leak. The biggest thing with these SDD’s is they can have ZERO leaks to work properly so do a good check.

View aki's profile


5 posts in 1042 days

#5 posted 10-25-2018 10:05 PM

Thank you all :) I did put the 3HP motor on top of the DD XL few days ago and fired her up with some chips and whatnot from the smaller DD I had taken off from the 4” DD. Worked beautifully. I’m running the intake straight along the wall and have some wye’s and keeping the bend in 45’s and trying to set it up with very little or no flex hose to avoid any turbulence.

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