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Post by MrP on Dec 2, 2014 13:17:22 GMT -5
MrP-Shaft is 1.5 inches, I think I said 1 inch earlier. James I was surprised when you said it was 1inch so it being 1.5 makes more sense to me. You sure have a lot of materials on hand. Wish I could find a junkyard, like you have, in my area...................MrP
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jamesp
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Post by jamesp on Dec 2, 2014 13:51:44 GMT -5
MrP-Shaft is 1.5 inches, I think I said 1 inch earlier. James I was surprised when you said it was 1inch so it being 1.5 makes more sense to me. You sure have a lot of materials on hand. Wish I could find a junkyard, like you have, in my area...................MrP Living outside the industrial district of Atlanta has resources. The street people bring a lot of that stuff in to sell. I bought 4 of those gearboxes for $50. Some had motors attached. It has been a nice resource.
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quartz
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breakin' rocks in the hot sun
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Post by quartz on Dec 2, 2014 15:04:43 GMT -5
I think the ~12 R.P.M. good for a start, but listen carefully. With the fairly narrow area for movement, you might get a lot of "carrying around" rather than tumbling. I also wonder if the movement of rock from periphery of the barrel to the inside of the load toward the center of the drum will be the about same. Instead of cutting the plate off to test wear, why not drill and tap 1/4-20 holes at selected locations. Put in a screw the same length as plate/bowl thickness, remove the screw and measure how much is worn off the length periodically. Beats the heck out of cutting the plate off, then sticking it back on. Gearbox should last well, make sure it has good oil in it.
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Post by rockpickerforever on Dec 2, 2014 15:55:13 GMT -5
Holy cow. Went through my junk pile and found sprockets and a pulley to get 12.5 RPM. #40 chain sprockets. So ratios will be about 2.5" @ motor, 5" @ gear box input, 13 teeth @ gearbox out put, and 30 teeth on final drive. 1:2, 13:30 and 1:30(gearbox)- 1/2 X 13/30 X 1/30 X 1725 = 12.5 RPM Say what? Sounds like engineer-speak to me. jamesp is as passionate about his junk and tinkering as 1dave is about geology . Gotta love 'em both!
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Deleted
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Post by Deleted on Dec 2, 2014 16:29:58 GMT -5
Holy cow. Went through my junk pile and found sprockets and a pulley to get 12.5 RPM. #40 chain sprockets. So ratios will be about 2.5" @ motor, 5" @ gear box input, 13 teeth @ gearbox out put, and 30 teeth on final drive. 1:2, 13:30 and 1:30(gearbox)- 1/2 X 13/30 X 1/30 X 1725 = 12.5 RPM Say what? Sounds like engineer-speak to me. jamesp is as passionate about his junk and tinkering as 1dave is about geology . Gotta love 'em both! Yes ma'am. They are both keepers!
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jamesp
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Post by jamesp on Dec 2, 2014 19:19:57 GMT -5
I think the ~12 R.P.M. good for a start, but listen carefully. With the fairly narrow area for movement, you might get a lot of "carrying around" rather than tumbling. I also wonder if the movement of rock from periphery of the barrel to the inside of the load toward the center of the drum will be the about same. Instead of cutting the plate off to test wear, why not drill and tap 1/4-20 holes at selected locations. Put in a screw the same length as plate/bowl thickness, remove the screw and measure how much is worn off the length periodically. Beats the heck out of cutting the plate off, then sticking it back on. Gearbox should last well, make sure it has good oil in it. Was going to do a 20 inch diameter drum, 4 inches wide.I think carry over was going to really be a problem being so narrow. Not sure if carry over will happen, hoping not. was hoping the taper would release the rocks, but it may grab them. The test bolts is a great idea. Welder uses torch, mechanic a drill, engineer can't do either. Will put fresh oil in that gearbox. Worm gears eat a bit of power in friction. Jack Daniels uses that brand on their conveyers. Must be quality. Have no idea how those rocks are gonna roll. Might as well give it a go.
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jamesp
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Post by jamesp on Dec 2, 2014 19:24:19 GMT -5
Somebody loves us Dave. We are lovable.
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Post by mohs on Dec 2, 2014 19:32:55 GMT -5
rock rolling is not rocket science its more advance mostly
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Post by rockpickerforever on Dec 2, 2014 22:03:42 GMT -5
Say what? Sounds like engineer-speak to me. jamesp is as passionate about his junk and tinkering as 1dave is about geology . Gotta love 'em both! Yes ma'am. They are both keepers! I was talking about the tinkering and geology.
Somebody loves us Dave. We are lovable. Okay, you got me. I was talking about the guys!
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quartz
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Post by quartz on Dec 2, 2014 23:45:08 GMT -5
The nice part of having lots of scraps and fairly cheap materials available is that it allows for affordable experimentation, hope it works well.
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jamesp
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Post by jamesp on Dec 3, 2014 6:49:27 GMT -5
The nice part of having lots of scraps and fairly cheap materials available is that it allows for affordable experimentation, hope it works well. Carlson Mufflers is about 8 miles away. They went out of the muffler biz and started dealing in used punch presses, like huge ones. They were 2 brothers in their 70's. Must have been 6 acres under roof. They were piling steel, motors, gearboxes, lathe parts, vices, galv sheet metal and you name it in scrap iron dumpsters and selling it of for 8 cents a pound. For 3 years. They had a about 1/4 acre of steel in the back corner that I picked thru. One day I stopped by and that whole area was sold for $8000. At 5 cents per pound, good stuff like angle, rod, sq tube, the best shapes. Enough to fill 4-5 tractor trailers. After thinking about it, I should have bought it. They had a shelf full of the Hytrol gear boxes like the one in this thread that they used on their conveyers new in box. I did concentrate on sprockets and pulleys in the 5/8, 1 and 1.5 inch bore hole category for future rotating equipment, along with fractional HP 110 VAC motors and small gearboxes. Not knowing what to do w/it all. But figured something would come up.
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jamesp
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Post by jamesp on Dec 3, 2014 6:52:47 GMT -5
Nurds establishing a toe hold w/the chicks 1dave !! Let's make Koolaid and invite them over.
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jamesp
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Post by jamesp on Dec 3, 2014 7:00:51 GMT -5
rock rolling is not rocket science its more advance mostly Next project will be a big tumbler so me and Ed can get inside and watch the grind mojostly...
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Post by mohs on Dec 3, 2014 7:13:25 GMT -5
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Post by mohs on Dec 3, 2014 7:19:39 GMT -5
I'm real interested in those silicon bricks james how would you attach them to the metal bowl if you were to do that? they were originally made for core drills? Could that machine be incorporated into sphere making monster? mojostly ! I owe ya mostly
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jamesp
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Post by jamesp on Dec 3, 2014 8:14:49 GMT -5
I'm real interested in those silicon bricks james how would you attach them to the metal bowl if you were to do that? they were originally made for core drills? Could that machine be incorporated into sphere making monster? mojostly ! I owe ya mostly You hire a master brazer like Ed Mohs that has brazed a million tungsten carbide bits to Foley saw blades. Those sintered diamond blocks come in boxes of 70-100. They are the cutting tips that go on quarry saw blades. Blades that are 3-8 feet in diameter, BIG BAD blades. That use 70-100 bits depending on diameter and pitch. Most common method is silver solder I believe. Other ones are used for concrete floor grinders, angle grinder diamond cups, etc. The concrete floor grinder bits go down to 16 grit diamond, the most coarse. The saw blade bits stop at 30 grit, most are 40 grit. The 16 grit is for slower speeds, probably could not handle saw blade speed/heat. The 16 grit is what I would use to speed rough grind/rock shaping in the slow tumbler.
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jamesp
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Post by jamesp on Dec 3, 2014 8:20:04 GMT -5
I'm real interested in those silicon bricks james -Diamond- bricks Ed. That last a loooong time. They must stick to steel well, otherwise they would sling off of a saw blade. If they last cutting 4 foot granite blocks, they must last. But the proper speed/feed/cooling is important for their useful life. I would like to solder them into a barrel and tumble with out grit just to see if the rocks grind. Easy test. Like an 8 inch pipe, with those marauders soldered on the inside of the pipe. Fill barrel only 1/3 full so the rocks are getting scrubbed on the lift. My PVC barrels wear on the ends. So the barrel in this thread is tall, with lots of surface area on the ends, where most of the scrubbing occurs in a barrel tumbler. This is not a black hole. This is the end of my 6 inch diameter PVC tumbler barrel. With a light behind it. Notice the 4 inch thin area that has worn in the 6 inch end cap. THAT is where the wear is. So a tall barrel say 20 inches should have a 4/6 X 20 = 13 inch scrubbing area on each side wall. With more pressure due to the height of the rock column. So instead of the rocks wearing the wall out, let the diamond covered wall wear the rocks out. Vengeance
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Post by mohs on Dec 3, 2014 10:17:46 GMT -5
Interesting James a 13” internal abrasive tube O you’ll irritate some atoms that way I hadn’t thought about the brazing ! genius! those bricks are a much like carbide You could easily braze them in. Brazing is pretty easy as your experience knows! acetylene torch, flux, and pre-sinter the blocks with a little silver solder. You know all about a cleaning the metal area. That solder flows so sweet. But then I was thinking how difficult it would be to get the torch inside the 13” pipe? Imagine the solder could be melted from the outside of the pipe to at least secure the middle bocks? The outer blocks wouldn’t present such a problem. Have you tried brazing any blocks as an experiment? what a project…!
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Post by Deleted on Dec 3, 2014 10:31:55 GMT -5
THAT is where the wear is. So a tall barrel say 20 inches should have a 4/6 X 20 = 13 inch scrubbing area on each side wall. With more pressure due to the height of the rock column. So instead of the rocks wearing the wall out, let the diamond covered wall wear the rocks out. Vengeance I just realized this thread is Vengeance University.
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jamesp
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Post by jamesp on Dec 3, 2014 10:33:41 GMT -5
Interesting James a 13” internal abrasive tube O you’ll irritate some atoms that way I hadn’t thought about the brazing ! genius! those bricks are a much like carbide You could easily braze them in. Brazing is pretty easy as your experience knows! acetylene torch, flux, and pre-sinter the blocks with a little silver solder. You know all about a cleaning the metal area. That solder flows so sweet. But then I was thinking how difficult it would be to get the torch inside the 13” pipe? Imagine the solder could be melted from the outside of the pipe to at least secure the middle bocks? The outer blocks wouldn’t present such a problem. Have you tried brazing any blocks as an experiment? what a project…! Ed, I was going to braze them on this shape barrel, before I close it up with a plate. Mostly on the 13 inch center area where the wear occurs. So easy access for the brazing chore. Or have it coated with synthetic diamonds....I think you can melt a blob of solder and sprinkle the diamonds on.
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