re: Danger of sawdust combustion?

Page 1 refers to MEC: minimum explosiible concentration. You just can’t reach MEC for saw dust in a small shop environment. The duct must be large and a LOT of dust has to be traveling through it, relatively equally spaced inside the volume of the duct. That’s why the risk is nil for small harbor freight sized DC united and shop vac based collectors. It’s not the dust in the can that is a problem. It’s the dust in the duct picking up static electricity as it moves.

I get static all the time on my mini collector. But it discharges on me usually. The stuff that goes into the can is more of a concern. Snell smoke when you’re cutting something? Hit a screw with the blade? Watch out for embers. Hehe.. Once I was pushing something on the router too hard doing something I shouldn’t have been doing and I started seeing red embers fly into the DC. LOL that batch went outside after that.

Didn’t someone wire a song about that? All it takes is dust in the wind… :-)