Anybody have a part number and where to buy a good exhaust fan for a 5x10 cnc plasma table. Thinking of making thin side that are removable out of 22gauge galvanized sheets and putting the fan at one end just blowing out of the shop. We have 6 bay doors on the small side of the shop and the cutter is only 4 ft away from the second door (easy to load material with forklift).

my email is whome124@aol.com if anyone can help or wants to send pictures of the setup you guys are using.

Thanks
Ed

Anyone?

send pictures of the setup you guys are using.

Thanks
Ed

Photo is of a commercially available unit, with an exhaust fan, that you could purchase from Dynatorch or duplicate.

I bought a blower from Grainger, per Dynatorch suggestion. It was a 15" backward incline blower, about 4000cfm, 3HP motor for about $1200. I think it was Grainger #7H166. It works great - no sooty crap in my shop!

3hp of exhaugst would make for a cold or hot and muggy shop for some people.

Are there any options for recirculation and filtration using less hp and blanking off open areas of the bed?

I have a 1.5hp welding fume extractor. Two feet from the port you can't feel much air movement. You have to get in close to capture the fumes. 3hp spread out over 5'x10' with half a sheet on it would have a huge open area, the flow must be gradual being so spread out. Is blanking off common? Or do people put up with lots of grit settling on things?

Thanks

We have two systems (one is a down draft on a 4 X 8 table and an over head hood on a 5 X 10). Both work well and we went the simple (read cheap) route with ours. Each has a motor and squirrel cage fan taken from old junk house furnaces from the scrap heaps at our local Heating Shops. Then we used 10" duct work ordered from Menard's.

The overheard works the best as no slag or cutting dust gets in the system as it goes down into the clean out tray under the table. The downdraft will be replaced when it finally goes T.U. (the motors get clogged with dust created while cutting).

Very little expense and you can find motors and fans for free.