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1880s era rock crusher

M

markct

Well-known Member
I recently bought this antique jaw crusher. Got it freed up and inspecting the bearings, may have to repour a Babbitt not certain yet. It's an interesting old piece and weighs around 12,000lbs. Plan to remove it from the truck chassis and put it on some skids that look more period correct. I always wanted one since I saw a smaller one at a show when I was a kid. Anyone know what rpm this should run at and hp required, I'm thinking around 100rpm since I'm sure those 58 flywheels hold a lot of stored energy even at that speed!
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(quoted from post at 04:36:07 06/09/21) Do those crush rocks down to road gravel size only or to dust that could be spread on fields?
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mj, all crushers put out a mix of all sizes from rocks down to dust. At quarries they run the out-put material from the primary crusher through one or more secondary crushers and screener plants to sort it into the size ranges that they want.
 
If it is on skids would that not limit your product falling out the bottom. With it on the truck frame it would allow more material to be run before clean out. You say it will crush down to about an inch. Is that in one time through or do you have to rerun it a few times tightening it up each time.
 
My crusher is smaller but the specs call for an RPM of 240. I run it at around 200.

What does the lettering on the front of the frame say? Does it identify the manufacturer, model etc?
 
I have one similar. A word of caution- if a rock gets in there just right, it can spit it back out and hit somebody, potentially fatally. Be careful.
 
Maximum output size can typically be adjusted by an adjustment that sets the opening size at the bottom of the crusher where the jaw plates meet. However the minimum maximum (don't know if I'm being clear) is fixed by the amount of cam in the eccentric shaft, going lower would crash the jaw plates. For example my crusher can only go down to about 2 maximum output size. Of course the output is a mixture from maximum output size down to sand and dust (called fines), and must be screened to sort.
 
Is yours also made by Farrel foundry? I have only found pictures of two others which were very small ones made by them
 
They have a rock crusher at Braddock North Dakota, it so old the old timers dont know where it came from, They have a two ton truck backed up to it,you can take your turn, dropping rocks into the hopper,at the threshing show in Braddock! It makes an nice size rock, for a person yard or driveway, in fact they have all walkways made out of crushed rock at their show site! It doesnt run very fast, i would say slower than a square baler, maybe 1/2 speed of that, They use a WD9 on it, running at about a 1/3 throttle, Belt driven! It's got two big shafts in there, one runs on a eccentric, or maybe both!
 
One of the local farms had one with an elevator. All the stones that were picked went thru the crusher. He told me that it was the ultimate revenge on the rocks
 
Yeah granite field stones that are roundish and about the size of a grapefruit or a bit larger are the dangerous ones. They can come flying out like a cannonball. I don't crush hard rock with mine, it stresses the crusher. Limestone, concrete, concrete blocks, and similar soft rock pose little danger of ejection. I kept all the hard rock segregated in a nice pile then someone came and stole the whole pile, I guess that's one way to get rid of the hard stuff!
 
I was thinking skids to raise it up 18 or so, and wide enough to scoop out with a narrow skid steer bucket
 
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