Over at the ShopNGarage forum, Steve posted a project log and tutorial on how to build a blast cabinet dust separator. The separator is designed to prolong the life of a shop vacuum and increase its efficiency by filtering out fine abrasive dust that can damage the motor. Steve’s design is built with a 2 gallon bucket, PVC pipes, plywood, and ordinary hardware.
The separator’s creative design is actually pretty simple to follow, and can be scaled up for use with a 5 gallon bucket as well. It functions like a gas bubbler and works very differently in contrast to the cyclone-action dust separator we discussed a few months ago.
Update: The Shop N Garage forum is defunct, so the broken link to the how-to has been removed. Sorry about that, this was done without warning and is out of our control.