Future dust collection blower ?

[Daren]

I went to visit a guy today and we were in his barn. He had this big old lawn vacuum, it was a big wagon with this thing on it.





It has an 8 HP Briggs on it and the inlet/outlet is 7". I am in the process of removing the Briggs .One stupid little allen set screw on the key way won't budge, I shot everything with rust breaker first. I even used a torch and tried to heat it...nothing. I walked away before I got mad at it and stripped it. Once that screw is out I can pull the impeller off the motor shaft and have the whole thing apart.

I have a smaller portable dust collector in my little woodworking shop. I have always thought I needed a big central one with drops to hook into. I was just to cheap to buy one, I figured something "would come along". Hey it just did. I asked the feller what he was going to do with it and he said he had not done anything with it for 3 years and it was given to him, so I could have it if I wanted it. Sure why not.

Now I just gotta figure out the rest. I can direct drive (or pulley if I had to) with an electric motor, I have a few laying around. They are all 1 h.p., think that will be enough ? The impeller is really thick/heavy.

I don't know what rpm that old Briggs ran at. I know the electrics are 1800 +/-. This is where pulleys/belt may have to come into play.

I am thinking cyclone type. The pipe part is easy I still have stuff from when I ran a plumbing shop (rubber furncos, pipe and fittings) I will just stick a plug/cap on the drops not in use at the time, I am not going all fancy with gates.

Any ideas to for me to think about? Who else has built something like this?

[hiya]

My son gave me a lawn vac when he moved. I just pulled it up to the door next to the planer. It has a 8" hose and a 4"hose, the 4'' fit on the planer. That worked good.That way I can take the shavings to the compose pile when the trailer is full.
I think I would use pulley & belt, would make it easier to change motors if or when you want.
Richard

[Daren]

My planer and the jointer are the 2 biggest mess makers. I heat the shop with wood in the winter, I am always housekeeping because I am afraid of fire. My planer is on wheels, if it is not raining I just roll it out into the driveway, even when it is cold. The other stuff (bandsaw, scroll saw, sliding miter saw, lathes...) I can take care of them with the portable dust collector, just roll it around the shop and put it near the tool I am using. I would like to have the planer, jointer on a bigger unit, especially the planer because of the amount of shaving it puts out. . I am not opposed to just cutting a hole in the wall and shooting them outside with the blower.

Actually the 8 hp Briggs is not locked up, and he told me it ran when he got it. I thought about cleaning the spark plug and changing gas/oil and see if she will fire. Crazy idea ? Just leave it outside (covered when not in use) and run a hose in through the wall. Go out and fire it up when I have a fair amount of planing to do.

[WH_Conley]

What is the diameter of the thing? I had one gave to me that was 24" had a 5 HP motor on it, from the factory. Impellers are 1" plate I beleive, haven't looked at it for a while.

[Don P]

Diameter makes pressure, width makes volume, both affect power required.
I'd use belts that way you can change pulley sizes and fan speed easily. A hinge type of mount will work with the motor providing the belt tension.

This is from some blower math in Dave Gingery's shop fans and blowers book might be somewhere to start.
https://forestryforum.com/members/donp/Blowercalc.htm

Bill Pentz's website has tons of info;
http://billpentz.com/woodworking/cyclone/Index.cfm

[Daren]

Thanks Don, I will study those links.

[Kcwoodbutcher]

Did exactly what you're planning to do with the front end of a billy goat yardvac.  The impeller is about 3/16" steel -12" diameter. The intake is about 6" and the outlet is about 3" by 5". Right now it is powered via a pulley setup and a heavy duty 1HP pool pump motor. I have it running around 3000 rpm. I plan on putting a 3 HP motor on it when I find the right deal on one, but the 1 HP seems to work fine. I had to wire the motor to 220 V because it would trip the 20 amp breaker on startup at 110 V. I have the intake restricted to 4" to match the dust port on the planer it is attached to. This decreases the CFM tremendously. This type of setup is way better than the thin metal impellers used on the homeshop collectors. I could send rocks through mine without tearing it up. I wouldn't try a direct drive setup. The impellers are pretty heavy and not perfectly balanced.

[mike_van]

Darren, I used one like that, mine's a Cub Cadet blow&vac - I mounted it up on the collar ties of the shop. There's 6" silo & stove pipe going out, and a 6" flex hose that drops down to the 20" planer. I made up a mandrel for the impeller, and drive it about 3000 rpm with a 2 hp 3 phase motor. About 17 years now, still going!    The steel impeller is good, I've had inch thick 3" dia knots come out of boards _ they're outside before you can blink!

[Daren]

That's cool Mike. I was thinking overhead too, my shop is small I can't afford to lose any floor/wall space.

[Ironwood]

I have one just like that, looking for a home (just impelller and shroud). Wouldn't hurt to have the impeller checked for balance.


                 Ironwood

[mike_van]

I know all about that small shop thing - In that barn, 20 x 20 ft, there's the SCMI planer, my welder & stuff, a 14" Leblond lathe, HUGE Cincinatti horizontal miller, parts washer tank, 14" bandsaw, Cooks catclaw band grinder, welding table 3x4 ft, woodstove, homemade tablesaw, and some other stuff. Most of it's on casters [including the planer]   Definitley a one man show - Two people trying to work in there would probably cause great harm to each other.  :D