Metso Lokotrack LT120, Jaw Crusher.

[D8R]

Interesting build, looking forward to see progress and ofcourse a video when crushing!

[Azonic]

Originally Posted by 9W Monighan

I noticed too that the plates need to be offset . It would definitely take less effort to crack a rock in half pressing it over a sharp point evenly rather than pinching it like wire cutters work.
I am working on some crushing equipment as well, but a slightly larger setup using existing laboratory crushers.

Exactly, I need to see if I can get some help milling a new fixed plate.

Any pics of that build?

Originally Posted by D8R

Interesting build, looking forward to see progress and ofcourse a video when crushing!

Thanks, I will try to get a video up this weekend with some crushing!

[9W Monighan]

Originally Posted by Azonic

Exactly, I need to see if I can get some help milling a new fixed plate.

Any pics of that build?

I just started a thread for the new company.

[Azonic]

As I sold the crusher a few months ago I still had a few parts left from the lasercutter to make another one, but I only have parts to make the crusherbox, so thats what Im going to do for now.

But this will be a slower build I think, I also lost all cad files when my harddrive gave up, Im going to let someone take a look to see if I can get some files back.
So I started to make another eccentric, axle is the exact same as the first one, 4mm throw, seem to work pretty good, one thing I will change later is the crush plates, this time they will be offset to each other, made that misstake on the first one to have them edge to edge.

Oh well, here is what I have so far...

[9W Monighan]

We had my Denver jaw crusher out last month for Cabin Fever Expo. Worked great!
I still haven't had time to edit some video of it working crushing hard Limestone.
Something you may want to consider on your jaws along with the offset teeth are;
Curved jaws. Watching my machine chew the rocks it looks like the curve jaw makes it feed well.

[Azonic]

Originally Posted by 9W Monighan

We had my Denver jaw crusher out last month for Cabin Fever Expo. Worked great!
I still haven't had time to edit some video of it working crushing hard Limestone.
Something you may want to consider on your jaws along with the offset teeth are;
Curved jaws. Watching my machine chew the rocks it looks like the curve jaw makes it feed well.

Yeah, I did consider that on the first one as well, but for simplicity I made them straight, but I think youre right, it will feed better.

Is only the moving jawplate curved on yours?

Also, how much throw does the eccentric have?

[Grainfarmer]

Nice project and great job! I´ve some worries if the excenter shaft will be strong enough...made of brass. A friend of mine built a chrusher years ago and had some trouble with teh shaft and bearings in the beginning. After changing ball into roller bearings it runs great...
But that was just an idea...keep on with your crisher. It looks great!

[9W Monighan]

Originally Posted by Azonic

Yeah, I did consider that on the first one as well, but for simplicity I made them straight, but I think youre right, it will feed better.

Is only the moving jawplate curved on yours?

Also, how much throw does the eccentric have?

I'll have to get back to you for the throw on on the crank and better view of the jaws.
Bear in mind that my crusher is a real machine in the sense that it is commercially built. As far as I know ,these are used for testing small amounts of ore in a laboratory.
Here's a view of the jaws I took last summer.

[Lil Giants]

Great to see you're gonna have another go at Kalle

Has the Norwegian ever sent you any finished pics your old one?

[Azonic]

Originally Posted by Grainfarmer

Nice project and great job! I´ve some worries if the excenter shaft will be strong enough...made of brass. A friend of mine built a chrusher years ago and had some trouble with teh shaft and bearings in the beginning. After changing ball into roller bearings it runs great...
But that was just an idea...keep on with your crisher. It looks great!

Thx,

Yes you might be right on the brass shaft, but on the first one I did some testing crushing real rocks and it did at least hold up for that, but this time I will use a larger beltdrive and flywheel and see how that goes, I can always turn a new shaft from steel if brass dont hold up.

I will try ball bearings for now, I had almost all of them on the shelf so we will see how they last.

Originally Posted by 9W Monighan

I'll have to get back to you for the throw on on the crank and better view of the jaws.
Bear in mind that my crusher is a real machine in the sense that it is commercially built. As far as I know ,these are used for testing small amounts of ore in a laboratory.
Here's a view of the jaws I took last summer.

Yes I see that its more heavy duty then mine, but this time around I might settle for just crushing softer material, but we will see.

Originally Posted by Lil Giants

Great to see you're gonna have another go at Kalle

Has the Norwegian ever sent you any finished pics your old one?

Thanks Joe, as I had almost all material to make a new crusher box I had a hard time just leving it there on the shelf!

I have some pics, not finished though, talked to him yesterday and he had been busy with work so no time for building.

[Azonic]

Made a little progress, made the 2 holders for the bearings.

I got the tolerances a little sloppy on 2 spots on the shaft, I think i will go for a shaft in steel and get the tolerance right and at the same time a stronger shaft like Grainfarmer said.
Might also go for roller bearings later on, found SKF roller bearings on Ebay that had a good price.

[jack van]

hi this is an awesome machine great build i see a chain and sprocket on the conveyer where did you find them ? i could use some for a trommel i am makeing

[Azonic]

Originally Posted by jack van

hi this is an awesome machine great build i see a chain and sprocket on the conveyer where did you find them ? i could use some for a trommel i am makeing

Thanks,

They are made by a German company named Maedler, but they don't sell online, you have to find a dealer to buy through.

[Azonic]

Oh well, I have scrapped the brass axle and roller bearings, the old one still seems to hold up for the new owner but I just wanted to make the axle out of steel and get the tapered bearings as someone here suggested!

I aslo have bought a house outside town and did a makeover on the garage that was in quite bad shape.

So here are some pics of the new crusher im building.

























Don´t laugh at my TIG welds, I have just started to learn how to weld with it !










This is how far I have got, I have printed the covers for the beltdrive and flywheel as well, next will be making the flywheel and mounts for the covers.




I also printed a little dust seal for the bearings as they are exposed to the outside.




And lastly, an after and before pic of the new shop!

[9W Monighan]

Nice work as usual. I see you fixed the jaw teeth like we discussed last time. Hope this works out well.
I like seeing crushing equipment being built. I haven't had enough time to get more done on my stationary crusher.

[Lil Giants]

Good to see you back it Kalle

Congrats on the house purchase & great job on the garage makeover, nice & bright in there now. Did you use LEDs for lighting?

Per your tig welds, they look better than mine, I still use my mig more than the tig. As Reg use to say, "gob it on & grind off the excess" ...though I think he does a lot less grinding off nowadays

[Azonic]

Originally Posted by 9W Monighan

Nice work as usual. I see you fixed the jaw teeth like we discussed last time. Hope this works out well.
I like seeing crushing equipment being built. I haven't had enough time to get more done on my stationary crusher.

Thanks!

Yeah, I had them made the right way this time.

I hope to finish this one and keep it, I will finish the crusher unit this winter and pick up next autum to continue with the frame, conveyor and feeder.

Originally Posted by Lil Giants

Good to see you back it Kalle

Congrats on the house purchase & great job on the garage makeover, nice & bright in there now. Did you use LEDs for lighting?

Per your tig welds, they look better than mine, I still use my mig more than the tig. As Reg use to say, "gob it on & grind off the excess" ...though I think he does a lot less grinding off nowadays

Thanks Joe,

Yeah, its a pleasure to work in there now!

No its regular armatures I have, I got these armatures for free from a friend. But I did went with another bulb (right word?) in them, these have a more white light then the regular used bulbs and are perfect for me.

Yeah you can always grind the welds but I think TIG welds are good enough looking even if they are quite bad, at least compared the bad MIG welds!

I really love my TIG welder, its so clean and you can do small welds, I just need to practice more to get more experience and less shaky hands!

[Azonic]

Now it was time to turn the flywheel and the extra weight for the beltwheel.
I only had a 100mm chuck on my lathe and it cant hold pieces as large as the flywheel so I had an chuck adapter made by a local machineshop to get the boltcircle right and then I turned the last steps myself.
Now I can fit a 125mm chuck and this lathe will last me a few more years!

Here´s some progress on this project.

First I turned the internal hole for the flange mount on the spindle.


Then flipped it to turn the outer flange to fit on the new chuck.
I had 0.01mm runout on the spindleface with new backplate.


Here mounted and started to turn the flywheel, I had a runout on the chuck on about 0.03-0.04mm, that was measured on a drillbit in the chuck. Good enough for me.




And just a pic of my 10 year old chinese lathe, it has served me good over those years.








Also both covers are printed, also made on a cheap Wanhao 3D printer.

[Rimrock]

Fine machined and printed parts you got there. Have you evaluated adjustable bottom opening/distance of the jaws?

[Azonic]

Originally Posted by Rimrock

Fine machined and printed parts you got there. Have you evaluated adjustable bottom opening/distance of the jaws?

Thanks!

I don't really understand how I can do that? Can you explain a bit more please.