All Replies on Woodsucker dust collector impeller failure

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Woodsucker dust collector impeller failure

by Mahoney
posted 01-29-2018 02:47 PM

2 replies so far

View bigblockyeti's profile


6738 posts in 2576 days

#1 posted 01-29-2018 07:02 PM

That’s scary, I can’t personally imagine the start-up torque would be significant enough to strain the welds but I would believe acute deflection could occur from the air resistance of blades flying around on a plate spinning ~3450rpm, resulting in fatigue failure over time. What model/HP was it? Do you have any pictures of the carnage you could post?

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

View Mahoney's profile


3 posts in 975 days

#2 posted 01-31-2018 03:44 AM

The Woodsuckers were all 2Hp, and they used a steel caged airfoil impeller, which is more efficient than the usual backward curved blade design used in almost every other dust collector. The torque needed to accelerate the bottom steel “doughnut” caging the airfoils has to be transmitted through the airfoils and loads them sideways, flexing them where they are welded to the top plate. All but 3 welds on one of the 4 impellers we inspected were on the same side of the airfoils, whether by design, or simply convenience for the welder. But it left the airfoils free to tip away from the unwelded side.

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