Building a Grizzly Screen

[Apsterbobed]

I have tried different screens and the only one that works good is the screens made for shakers. I just got done with a shaker and it sure works great and fast. Here are a few pictures.
You are doing a great job and I'm waiting to see this job to the end keep posting pictures.

No progress tonight... I had thought about making a shaker, but it came down to a few things that made me go with a stationary. First and most importantly it would have cost me more, as it is now the only cash I have to put out is the steel for the actual screening. Second I didn't want another engine to have to fight with. Now I wish I had a second tractor, but there is no way I could talk my wife into that! Third the more things that are moving the more likely I am to manage to break something . But that said a shaker is much more efficient with less waste. If I was making money with the screen I wouldn't have given it two thoughts, it would shake, rattle, and hopefully not roll over.

 

[Rustyiron]

Now I am looking for suggestions on the screen. I will have to purchase this steel so I have been putting this off. I have been kicking around the idea of welding on bars to a 4" (give or take ) space, then build an overlay mat to reduce it to 2". Also should I have a grid or are the vertical bars enough, t have been leaning towards none or very few horizontal bars. Thanks for the input.

I like your 4" with 2" "overlay" Any horiz. bars will reduce the movement of the spoils. I'd use, watch, and learn. Then if you have seperation of the vert. bars, add your support in the middle. This horiz pc can be small as it mainly will control the vert bars from separating. (attach to the underside)

 

[Leejohn]

Your system well work great. The point I wanted to make is the screen, that's where it's at.

 

[Apsterbobed]

I put a brace on the under side of the screen area in the hopes that would help keep the bars from spreading and bending. When I put the overlay screen together I will try it without horizontal bars and see how it goes.

Stopped by the steel store to get some prices, it looks like I am going to build the screen from 5/8 rebar. Now I just need to take some measurements and figure out how much I need.

 

[Leejohn]

I heard that screen was out of sight, I was lucky, I got it for free.

 

[Apsterbobed]

No progress this week but I did pick up the rebar (hopefully enough).

This is the best part:



This is the screen from a sander. It is 2.75" squares and 4' x 8'. It changes my plans a little, my overlay is now going to be a slightly larger opening and I will have to figure out how to extend the screen another 2' to match my frame. But the price was right, free!

 

[Apsterbobed]

Made some progress this weekend, only have 4 or so bars left to weld on and the 4" screen will be done.

 

[Apsterbobed]

Finished welding the 4" screen today. The frame is done, the screen is done, and the plywood sides are cut and drilled. Now I just need some warm weather so I can paint everything! I am going to wait to build the overlay screen untill I have a chance to run some material through incase I decide to make any changes.



If you have a good eye you may spot my mistake, someone needs to learn to mark witch side of the line the bar belongs on ! I started putting the bars on in the center because I knew the last space on each side was going to be oversized. It should have been 4" between each bar and about 4.5" between the last bar and the frame. But when I started I put the very first bar on the wrong side of the line, so I ended up with 4.25" on the left and 5" on the right. All the rebar I purchased was 5/8 but I screwed up and shorted myself a stick, so there are a few 1/2 that I had on hand mixed in, that also made the last opening slightly larger.

 

[Leejohn]

It's looking real good, waiting to see how it works.

 

[Apsterbobed]

I really want to put some material through it, If I had the tractor at the house I would have already! But I know I should get some paint on it before I have to wash it, I have already wire wheeled the whole thing I just need to wipe it down and it's paint ready. Now all I need is a few days over 50 degrees that are not raining!

 

[TnAndy]

LeeJohn:

I'd love to see the details on your shaker, especially the part that does the shaking, the gear reduction and all down to the point of the PTO attachment. I'd like to build one with a stand alone engine, not having a spare tractor.

andy

 

[Citydude]

Looking good!

 

[Apsterbobed]

LeeJohn:

I'd love to see the details on your shaker, especially the part that does the shaking, the gear reduction and all down to the point of the PTO attachment. I'd like to build one with a stand alone engine, not having a spare tractor.

andy

I would also like to learn more about your shaker, and I also don't have a spare tractor!

We finally have had a few warm days! Tonight I got the first coat of primer on. I painted the bottom side of the rebar, that was a royal pain, so I am done painting the rebar. I figure it's going to be back to bare metal shortly after I use it so it's not worth the effort. I have enough primer for a second coat tomorrow. Hopefully I will have enough to put 2 coats on the bottom. The primer is leftovers from another project, and even better is that I didn't even have to buy it in the first place. So far I only have about $100 invested in the screen, mostly the rebar and some welding wire and tips.

 

[Apsterbobed]

Well I have finished painting and installing the plywood sides and back. All the paint was leftovers, a friend painted his truck blue in my garage about 10 years ago (we will see how that holds up), a little white house paint, and some red barn paint that has turned pink brown (also about 10 years old). If the paint doesn't hold up then at least I didn't have to pay to dispose of it and most likely any paint will get worn off once I start using it. I still need to make the reducing overlay, gotta put some material through first and I have a few other projects that need attention.



The real kicker is that the paint isn't even dry and I have already let someone borrow it, I have to drop it off some time this week. I'm looking forward to hearing how well it works .

Also the dog is mid haircut, he was getting antsy so we gave up for a while and now he looks creepy.

 

[Leejohn]

It sure looks good, but might not look like that long. You did one thing wrong, I made the same mistake on the 1st one I made. You put the wood on the outside and it well get pushed off when cleaning out. You can clean the back side by pushing it to the side then pick it up. I did some shaking today for about a hour and got about 12 yards of clean stuff.
I think I might have to drop my angle down some. I think I'm losing to much smaller rock that's not getting time to go thru the screen. I'm going to try slowing it down 1st, just have to order a new pulley and belt. Right now the tractor's pto is runing as slow as I can get it.

 

[Apsterbobed]

It sure looks good, but might not look like that long. You did one thing wrong, I made the same mistake on the 1st one I made. You put the wood on the outside and it well get pushed off when cleaning out. You can clean the back side by pushing it to the side then pick it up. I did some shaking today for about a hour and got about 12 yards of clean stuff.
I think I might have to drop my angle down some. I think I'm losing to much smaller rock that's not getting time to go thru the screen. I'm going to try slowing it down 1st, just have to order a new pulley and belt. Right now the tractor's pto is runing as slow as I can get it.

I know what you mean about the wood on the outside, the problem is I didn't provide Nailers in the corner so that I could catch both the back and the side at the same time. When I started cutting the plywood to size I noticed this but I was running out of steel. I thought that I might be able to push them off but we will see. The good thing is that they are larger to fit the outside so if it's a problem I should be able to cut them down and move them in. The other reason I didn't try too hard to get them on the inside is I thought the steel would protect the plywood from the bucket edge.

 

[Dadnatron]

It looks great.

I think this guy's idea about portability as well as a pseudo-shaker might be a good option if you do it again.

Picking it up and moving it with forks would be optimal. Knocking a stuck load by tapping your bucket would also be good.

Portable grizzly screener - YouTube

 

[Apsterbobed]

I have seen his video, I like his design. The next one I do will be a powered shaker (if I make another) to make -1". I still need to make my overlay to reduce it down to 2" +/-. The only reason I didn't add any movement to this one was cost, I have about $100 invested between rebar and welding wire, if I had had springs or leafs in my scrap pile I would have tried something like in that video. I have not put anything through it yet, a friend has it now and should start screening about 20 yards of fill removed from a handicapped access ramp project.