In looking at other parts of the forum I saw some past dirt sifters and thought I'd post my take on it.
I tried the box setup and found it too slow for the literal tons of dirt and rocks I needed to sift here. So when a friend gave me a plastic 55gal barrel the dim bulb went on. I decided to make more of a leaky cement mixer setup. I had most of the materials except the 3/4" conduit. Luckily it's pretty inexpensive. I cut two circles out of 3/4" plywood to strengthen the bottom of the barrel where the drive would be and screwed them together with deck screws. To hold the end of the barrel up I had a bunch of these sealed bearing rollers that are off a conveyor drive at the place I used to work. They had no need of them when they scrapped the conveyor so I got a bucket full of them and I use them for everything. They have some kind of heavy duty vulcanized rubber with a groove in them for the drive belt, perfect for going in the top seam of the drum to support it on the front. I also had tons of 1/2" rod that I used for the braces that hold the upper rollers and eventually to hold the improvised plastic tarp/dust shield away from the top of the drum. The holes were cut with a hole saw and then covered with 1/4" wire cloth to do the sifting.
I also had the 1" shaft and pillow block bearing along with the cull belt drum that I cut in half to make an adapter for the HFT handheld pipe threader that now powers the sifter.
the top three pix were the early stages to see if it would dump like I hoped. And I'd not yet tried it out so it was hand powered with the handwheel off the HFT roller I used to roll the bottom 3/4" pipe crossbrace and the ring that holds the upper support rollers. When I took off the handwheel I also had to weld on handles to move the whole thing. It actually is quite easy to move because it's pretty light and when tilted back on the handles it's balanced. That was just dumb luck.
I have one of those HFT tubing rollers so the 3/4" pipe cross frame and the 1/2" rod were both rolled on it. If I ever get time I'm going to adapt the pipe threader to the roller too. That 40rpm that thing runs at is very handy and it's very powerful. But like most HFT's it needed some work after a while because one of the circlips in the gearbox popped off in reverse because they hadn't cut the groove for it deep enough. Luckily I heard it bog down and turned it off right away. So it didn't destroy anything and I was able to cut the retaining groove deep enough and it's been working good for a bunch of hours and yards of rock now(as he knocks on his wooden head ).
I have not looked to see if they still carry it. It got real low ratings but I wasn't sure if it was the dies that came with it or what. After having the gearbox apart I can see if they didn't fix this problem at the factory they might all self destruct given enough time. The one I bought had been a return to a HF down south and it was in the clearance bin. Best to run it in both directions at the store to see if it has any problems because lots of times you can't return a return. It's obviously a copy of a very expensive threader for 1/10th the price. As long as you go in with low expectations and the idea you will more than likely have to work on it, it's ok. Oh and also as long as it's mechanical not electrical
Great build C-Bag, Thanks for sharing! Nice design with bits and scraps and of course HFT returns. Particularly liked your roller set up and the ingenious way you connected the threader...looks substantial. Curious about the Giant O-Ring on the front of the drum where the bearings are...was that part of the top seal for the drum? It's magical sometimes how things fall into place like your balance...Always worth a "Thank You" !
‘‘Always do right. This will gratify some people and astonish the rest.’’
Thanks PJs! I'm not sure what you mean by the big O ring. I think you are talking about the 1/2" rod ring that the upper rollers are attached to. That I rolled on the the big HFT Tubing roller. I should take some pics of it as it's also handy as a shirt pocket. It of course has been modded to do different stuff. I'm learning from you and Paul's excellent builds how to take pics. Unfortunately I never think of that until after I'm done.
The coupler was this solid cull belt drum I cut in half. For those who have not been around fruit packing equipment it's a narrow 4" wide belt that carry's away the fruit that either too ripe or damaged to go to market and is called culls. My father in law used to make packing house equipment and had various parts laying around. So I picked up the set. 2 x 1" shafts, 2 x 3" drums and 4 x 1" pillow block bearings.
One shaft and one pillow block are what the drive is connected to. I cut the drum in two and one end I welded 4 angle irons radiating out to be bolted into the plywood stiffener on the bottom of the plastic 55gal drum. The other half of the drum was turned into the coupler for the HFT pipe threader. If there is any interest I could pull off the tarp and try and get closer pics of the drive and the front suspension.
Last edited by C-Bag; 08-14-2015 at 08:45 PM.
Thanks DIYer! I started out sifting by hand and using the big handwheel in the top pics, man did that get old quick. But it proved the concept was going to work.
A friend said why don't you just use a variable speed drill but I knew that was going to not be heavy duty enough. I also didn't want to put some kind of motor with a belt drive, that was too complicated and bulky and it's pretty dusty. Just perusing HFT I saw that threader and saw the rpm....and the thunderclap hit. I'm itching to modify it with an easier direction switch. It's got a really cheezy recessed switch that doesn't seem very positive. But it's working and I'm not as good an electrician as I am a mechanic. I'd hate to fry it. Because it was in the return bin it was basically brand new and I got it for $100. I couldn't have come up with as nice a gear drive for that much. I also need to store it in a small shed so the motor needed to be removable, which it is because of the quick change setup. If you look close I used an old shaft, spring, washer and knob off a computer chair to hold the threader on when it's in use. Just like a magpie, I can't throw any shiny/useful stuff away. Sooner or later it finds it's new purpose
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