Old rebuilt jaw crusher from Boulder Col. help and use thereof.

[Mad Machinist]

www.treasurenet.com/forums/hard-rock-mining/420352-ball-mill-design.html

Here's an idea to help you out.

 

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[Assembler]

Hello
Thank you for the link to ball mill design Mad Machinist. Will have to take the time to read it all.
Do have a thick wall very small drum out of Stainless Steel may work with down the road. Still trying to work on the sample jaw crusher first.

 

[Assembler]

Hello
Will have to get this one's feet more wet first with the jaw crusher and start chasing some reasonable Ore fist. Trying not to spend every cent in the process.....LOL.

 

[Mad Machinist]

Hello
Most people don't have access to a ball mill. This one will try to make a set of 'Rolls' to carry out in the field but not to start with. Thank you every one for your input.

If your looking at a set of high pressure rolls to crush ore, you WILL need to hard face the rolls. Otherwise they will not last long crushing ore. They will also hard faced again and again as the hard facing will wear. All the old hard facing will need to be ground or machined off before new hard facing is applied as you CANNOT place new hard facing over old hard facing due to it becoming extremely brittle.

 

[Assembler]

Hello
Mad Machinist pointed out:
I

f your looking at a set of high pressure rolls to crush ore, you WILL need to hard face the rolls. Otherwise they will not last long crushing ore. They will also hard faced again and again as the hard facing will wear. All the old hard facing will need to be ground or machined off before new hard facing is applied as you CANNOT place new hard facing over old hard facing due to it becoming extremely brittle.

Excellent point about the hard facing of the rolls work hardening to the point of getting brittle. The pipe this one is thinking of using has a wall thickness of about 3/4 inch thick. Hope that by running some beads of hardening rod and cooling as fast as possible will keep the warpage or movement down? Any ideas here?
Have taken a 1 1/8 inch shaft and added metal to one end of the shaft to then machine on a lathe down to 1 1/2 inch to be welded into the pipe with 3/4 inch walls to make a roll. Sounds like the roll is a one shot item?

The jaw crusher plates have two layers of hard facing rod welded on them. Made the plates bow bad. have not flattened yet. Any tips out there on this?

 

[Assembler]

Background

Hello
This old jaw crusher was built to be a one shot unit with the old worn out babbit bearings. However there is enough cast iron mass in the rest of the unit to line bore out the babbit bearings and press in more modern bronze bushing bearings. The jaw plates where long ago wore out as well.
Wish this one could talk to you Mad Machinist in person as you know about metals and machining.

May PM you about a engineering firm in Arizona doing " First papers now within the BLM " if this one can find the links and info. again as this was a few years back. Maybe you all ready know about this? Don't think the "Final papers are being done now due to no Congress funding for this?
The costs appear to be high in both money and researching the older "Manuals of Surveying Instructions" as well as typed up "Officer documents" (1970's - 1980's)?
Any ideas in this area?
Thank you.

 

[Assembler]

Hello
Forgot to point out about the Arizona engineering firm the 'Key to success' was in part getting a "Agent". The purpose of appointing an agent is to clothe him, at least for a time, with a portion of the powers with which nature and the laws of society have invested the principal. The starting point was in digging up older documents from say the 1980's and use almost word for word today for the "First papers" as well as getting a "Order number" from the "Land Office headquarters".

Reminds me of the old joke "Who's on first base"? .........may not be anyone there seated today with no funding for it from Congress? Makes it much harder to do don't you think so?
Thanks for reading.

 

[Assembler]

Hello
Some of the exact words used by the "Agent" helping the Arizona engineering firm is from section 734 (page 731 of 1947 manual) under the 'Heading Plats':
The approval of a mineral survey is final, no acceptance being required as in the case of the public land subdivisional surveys. When approved, (Order number) the plat will be reproduced and the returns of the survey will be distributed in accordance with existing regulations.
Yes this is still in 'Place' today just no funding for it and a lack of "Agents / Officers seated".

 

[Assembler]

marking of the section and subdivision-of-sections lines with in the mine which divi

Hello
Has anyone talked to a "Surveyor" about "The marking of the section and subdivision-of-sections lines with in the mine which divide private and public lands"?
Thank you in advance.

 

[Assembler]

Hard face Rods and Rolls

Hello
Mad Machinist pointed out:

you WILL need to hard face the rolls. Otherwise they will not last long crushing ore. They will also hard faced again and again as the hard facing will wear.

Do most people just use a rod or roll just once not wanting to machine off the older hard face surface. Are there any tricks to try?
This one has read that even with a ball mill the rods may only last a few tons at best? If this is the case the same is true of the 'Rolls' this one is thinking of making. Thank you for your input Mad Machinist. Hope you get something out of my 'Green question' posts.........LOL

 

[Assembler]

Mild Steel jaw plates?

Hello
If this one has a hard time flattening the jaw plates with the hard face beads on them. May see how long some mild steel plates last. If the mild steel plates last 1-2 tons of rock say down to 3/8 inch this would be excellent. The hardness of the rock is a big factor. Anyone have experience with plain old mild steel?

 

[Assembler]

Hello
Any ideas on other metal plate for a jaw crusher?

 

[Mad Machinist]

Hello
Mad Machinist pointed out:
I
Excellent point about the hard facing of the rolls work hardening to the point of getting brittle. The pipe this one is thinking of using has a wall thickness of about 3/4 inch thick. Hope that by running some beads of hardening rod and cooling as fast as possible will keep the warpage or movement down? Any ideas here?
Have taken a 1 1/8 inch shaft and added metal to one end of the shaft to then machine on a lathe down to 1 1/2 inch to be welded into the pipe with 3/4 inch walls to make a roll. Sounds like the roll is a one shot item?

The jaw crusher plates have two layers of hard facing rod welded on them. Made the plates bow bad. have not flattened yet. Any tips out there on this?

If you make the shaft the same size as the inside diameter of the pipe, then pack in dry ice overnight, it will fall right together. When the shaft warms back up, it will have an interference or "press" fit. I do this all the time at work except I use liquid nitrogen.

As for the hard facing, I would do a continuous bead with a MIG if you have it, but that would require a rotary table. With a stick welder, run about half a rod, then let it cool to the touch and go again.

Now on the the jaw plates. Welding warped them due to heat and welding draw. Welding can also straighten them since this time your using welding draw to your advantage. Run some beads across the back side of the plate and use a grinder to clean them off. Once you run a few beads, you'll understand what I am talking about.

 

[Mad Machinist]

Hello
This old jaw crusher was built to be a one shot unit with the old worn out babbit bearings. However there is enough cast iron mass in the rest of the unit to line bore out the babbit bearings and press in more modern bronze bushing bearings. The jaw plates where long ago wore out as well.
Wish this one could talk to you Mad Machinist in person as you know about metals and machining.

I don't know why you would think babbit bearings are a one shot deal. Of course there are not many of us left that know about babbit bearings.

https://www.amazon.com/How-I-Pour-Babbitt-Bearings/dp/187808724X

Best thing about babbit bearings is if you mess it up, remelt the babbit and pour it over again. And babbit is soft enough that if a piece of ore would happen to find it's way into the bearing, that piece of ore would embed itself into the babbit instead of scarring and destroying both the bearing and shaft.

 

[Mad Machinist]

Hello
Mad Machinist pointed out:

Do most people just use a rod or roll just once not wanting to machine off the older hard face surface. Are there any tricks to try?
This one has read that even with a ball mill the rods may only last a few tons at best? If this is the case the same is true of the 'Rolls' this one is thinking of making. Thank you for your input Mad Machinist. Hope you get something out of my 'Green question' posts.........LOL

Machining the hard facing off isn't hard. Just use carbide inserts. As for lasting, that all depends on how hard your ore is.

 

[Assembler]

Thanks

Hello
Wow thank you for the tips Mad Machinist. Yes this one is aware of the process of welding will draw the base metal. This one has read about people pouring babbit bearings however will not do. Will try the ice as this one has seen a shop person drop out seized up pistons out of a block using ice and some heat.
Glad this one asked as these are very good tips.

 

[Assembler]

Hello
Maybe a carbide or diamond disc will cut off the old hard face surface on a jaw plate?

 

[Assembler]

Hello
Got some center drills and now going to try to turn the set of high pressure rolls to crush ore down to 1 1/2" on one end of shafts. 1" on the other ends for pillow block bearings. Then will weld into the 2 1/8" O.D. pipe rolls.

 

[Assembler]

Happy 4th.

 

[Assembler]

Hello
Got most of a all aluminum trailer that is 2 x 4 feet in size built to put the crusher on. Also turned the shafts for the rolls say 3 - 6 thousands over size.