Cedar Rapids question what exactly is a JAW ROLL CRUSHER i know what a jaw is.

So can some one help me out I'm not up on all this plant stuff.
I HAVE BEEN WANTING A CRUSHER to crush rocks, concrete, and brick.
This guy has a Cedar Rapids but could not tell me what model it is, he did not know but replied there were numbers all over it.
I even asked him about the jaw size he was unsure, Its a ex county owned machine and he has tones of spare parts belts bearings ect,
Its powered by a 3406 cat has tandem wheels 5th wheel so you can pull it with a semi.
He just told me it was a jaw roll crusher has hydraulic grizzley 4" holes and another deck has 2" holes
its got a big round wheel with a roller track does material spin inside it and get crushed some how please explain if you can.
What could it be worth? it works as I seen video.
I got to go see it and make offer he said the county paid over 140,000 for it 10 years ago, I don't know the year of it either.

That would be a commander plant , probably a 10or12 by 36 in jaw crusher and then a roll crusher to recrush the jaw crushings down finer again... they were good old plants.

It has a jaw crusher, a two deck screen and a roll crusher, all of which would be difficult to work on, even to change a screen cloth on the top deck of the screen. The only advantage I see in it is you can move everything in one trip, whereas with separate components you'd have 4 loads, which would consist of the jaw, screen, roll crusher and generator which would power everything plus a flat bed load of conveyors. Google the 3 separate components I named to see how they work. Speaking for myself, I'd shy away from it simply because of the difficulty of performing routine maintenance on the components let alone major repairs.
Mike

The big wheel is called a rotovater around here and takes the screened oversize and sends it back to the feed conveyor for a second pass threw the crusher.

I bought one of those for a company I worked for. A lot of those type of plants were originally built for the military, then sold off as surplus later. They are really useful for a small operation that does not need high capacity. The one I bought was used to crush surplus/out-of-spec/unsold bricks. We moved it around to several different brick plants, and it did a great job. They are not that hard to work on, but everything is pretty jammed together, and there are a LOT of wear parts to keep up with.
If the material you want to crush will respond well to a jaw and a roll crusher, then go for it. All of these plants are going to be old, mostly manufactured in the 50's or early 60's, so don't spend too much up front, and expect a lot of repairs to be needed up front.
Cedar Rapids and Pioneer built most of these old plants. Cedar Rapids like to use Detroit diesels on theirs. A lot of the Pioneer plants had Cat diesels on them.

Correct me if I am wrong but I wouldn't be putting concrete though that plant if you could get the chunks though the plate feeder and managed to get the rebar to the rotovator with out tearing a belt or jamming up the rolls it would likely end there Might be good to run some gravel though If you have knack for keeping old wore out junk together its an expensive high maintenance operation our 20x36 cedar rapids just got bearings 20,000

Putting concrete through this type of plant is not advised as all material goes over the screen before it passes through the jaw. If you have a material that has rebar or mesh, it will hang up in the screen. I doubt it would even make it to the jaw, through the second deck to the rolls and then the rotovator or rat wheel as some call it up here. They are a fairly popular plant here in Canada, their only downfall is the tonnage. We used to get about 200 tph on a good day making 20mm base gravel and about 175-200 for asphalt material. some of the newer cone setups will get almost double in some of the same pits.
Maintance is a little more, we had to shut down and hardsurface the rolls from time to time. Changing screens is not hard, just a little cumbersome at times, but never took more than time than on the larger systems.
As for bearing, well, they go, no matter what type of jaw, or cone, system.

according to the cedarapids pocket book you should be able to find a serial plate by looking at the kingpin end, the plate is on the front cross member of the truck frame.

it should say some thing like model 544, or model 442 of something like that. Each number represent, jaw, roll, and screen.

hope this helps.

plowking740 said:

Putting concrete through this type of plant is not advised as all material goes over the screen before it passes through the jaw. If you have a material that has rebar or mesh, it will hang up in the screen. I doubt it would even make it to the jaw, through the second deck to the rolls and then the rotovator or rat wheel as some call it up here. They are a fairly popular plant here in Canada, their only downfall is the tonnage. We used to get about 200 tph on a good day making 20mm base gravel and about 175-200 for asphalt material. some of the newer cone setups will get almost double in some of the same pits.
Maintance is a little more, we had to shut down and hardsurface the rolls from time to time. Changing screens is not hard, just a little cumbersome at times, but never took more than time than on the larger systems.
As for bearing, well, they go, no matter what type of jaw, or cone, system.

according to the cedarapids pocket book you should be able to find a serial plate by looking at the kingpin end, the plate is on the front cross member of the truck frame.

it should say some thing like model 544, or model 442 of something like that. Each number represent, jaw, roll, and screen.

hope this helps.

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Well thanks for everything its a cheaper priced unit under 30,000 I'm hoping to get it for 20 to 25000 and comes with a bunch of spares to help keep it going.
last thing they were doing with it was running creek bed sandstone thru it. I would run a concrete pulverizer on the track hoe to help feed it and would try not to run any crete that has wire or rebar
HOWEVER could one cover or replace the screen with sheet of steel and just run thru jaw?

OK guys
well he got back to me its a Cedar Rapids model 443 commander which is the smaller version I guess as I found print out with models so it has a 10 x 36 size jaw the others have a 12 x 36 jaw the screens a 48" x10 says tph 200 to 320 based on 1" material

Does he have an automatic welder system for the touching up the rolls? if you plan on doing a lot of work, it is an ideal tool to have. I don't know how many people still travel around doing that type of work.
I thought about what you said about covering the screen with a steel plate. I don't think it will work because the crushed material will come back around then have no way to get down to the pay belt, so it will just go around and around the system.

would that welder be like one used for line boring

I guess some how there will have to be a way figure out how to crush concrete if it has wire mesh the best is to keep it clean

That one appears (pictures are vague) to have the original star drive system. Im surprised by that because most of the star drives that power the roll crusher were replaced by rubber tire drive. I spent ten summers running one of those as a kid!! That reminds me of the sound of the jaw crusher going " pucka pucka pucka" all day long. We pushed to that plant with a 3T D7. I'd love to hear those two units working together again.

fiat41b said:

Well thanks for everything its a cheaper priced unit under 30,000 I'm hoping to get it for 20 to 25000 and comes with a bunch of spares to help keep it going.
last thing they were doing with it was running creek bed sandstone thru it. I would run a concrete pulverizer on the track hoe to help feed it and would try not to run any crete that has wire or rebar
HOWEVER could one cover or replace the screen with sheet of steel and just run thru jaw?

Click to expand...

I would snatch that up in a heart beat if it was around here, they are generally 85k plus and it would be a perfect size for my little outfit.

Yea, they don't last on the market too long. My dad has helped sell three units in the last couple of years. Usually go to the smaller contractors to supply inhouse or small municipal jobs.

fiat41b said:

Well thanks for everything its a cheaper priced unit under 30,000 I'm hoping to get it for 20 to 25000 and comes with a bunch of spares to help keep it going.
last thing they were doing with it was running creek bed sandstone thru it. I would run a concrete pulverizer on the track hoe to help feed it and would try not to run any crete that has wire or rebar
HOWEVER could one cover or replace the screen with sheet of steel and just run thru jaw?

Click to expand...

Just remove the bottom deck of the screen.
Mike

Also if you can keep the jaw choke feeding :ie keeping it at least 1/2 full while it's running it will make a more uniform product having less rock returning to the jaw to be crushed again. If it has more and more returning to the jaw it will need the discharge opening closed up to eliminate some of the return. With a jaw you'll never totally eliminate the return. It's just a matter of maximum throughput w/ minimum return which takes trying different discharge openings to find the sweet spot. And since the feed has to go over the screen before going to the jaw. For myself, if you're crushing concrete or shot rock, I'd prefer the feed go thru the jaw first and then to the screen unless you're crushing pit run gravel which would run thru like it's set up.
JMHO,
Mike

edit:IIRC that cedar rapids screen has grease zerks on both impulse shafts on the drive end which need to be greased every 4 hrs, and a sight glass on the other end which lubes the countergears with 80w90 oil and it needs to be checked every day's run as the seals can leak oil into the cover over the impulse weights. There's a small hole in the bottom of the weight cover and if you see oil dripping out the hole that means the seals are leaking.

wow thanks for everything
I just hope the guy calls me back I wanted to take the drive to see it in action for myself at his yard
but I have not heard back from him wish me luck as you never know what might be happening

We had a 544. They put a boat load of money into it, and then sold it for a song. They sold it with the Detroit on it, but we ran it with a gen set, and electric motor. From the time it was dropped in the pit, until you were set up and crushing might be 2 hours. Now the spread they have, to tear down, move, and set up can take as much as 4 or 5 days, and cost about 7 or 8 thousand dollars. They had a little job this summer to crush 25000 tonne of inch and a quarter. Would have been a perfect job for the 544, but they had to tear down the quarry spread, move a cone, a screener, a feeder, at least a load of belts, a gen set, a fuel tank, and 2 loaders. So at least 8 moves. One loader would keep the 544 going, so half the moves, and production in Les than a day.

Portability is a positive but you have to balance that against the TPH desired. Will you be happy to be able to move cheaply and take at least 3 times longer to do the job.
Mike

plowking740 said:

Does he have an automatic welder system for the touching up the rolls? if you plan on doing a lot of work, it is an ideal tool to have. I don't know how many people still travel around doing that type of work.

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I worked around a Cedar Rapids back in the 80s, we had a guy who'd come and hard face the jaws, rolls and whatever else needed done on buckets, etc. He'd show up in the early evening and weld into the night while it was cool, and have an old electric AM radio plugged in nearby, nothing but static coming out from the welder running. I was a kid, had welded some, but got curious and asked him, "Why the radio?" He said it was to judge the performance of the welding arc. I have no idea whether he was pulling my leg or not, but that old Motorola was nearly black when I'm sure it must have started out life white, obviously it'd logged a bunch of hours next to him.