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The combined ratio is 50,150:1. But instead of 1 RPM I was looking for 1 revolution in three hours or about .005 RPM. I would like to thank everyone who replied to this post, but the project has been abandoned. Thanks again.

Thanks for all the replies. This post will help explain what I am driving. Link IRstuff, I would agree that the grain will behave somewhat like a fluid. I would like to have the spokes designed for the maximum load that they will see. When grain is being taken away from directly underneath the...

Thank you for your reply, racookpe1978. I apologize if I have not made myself clear. The first option that I mention would have a 1" flat area the length of the the horizontal braces (15'). The second option would have two 3/16" wide areas the length of the braces besides the few cross pieces...

Sorry. After I uploaded the attachment, I didn't see you needed to click on the link to insert the file.http://files.engineering.com/getfile.aspx?folder=bd134148-2cd6-4621-93b1-462d22c29410&file=sketch.pdf

I need to hold in place a drive assembly mounted in the center of a grain bin. My plan is to use three "spokes" that will be supported on the concrete foundation on the outside of the bin. They will project to the center of the bin and be supported in the center by the drive assembly. These...

Thanks again for the help and suggestions. After considering all the suggestions, I plan to leave the existing screw conveyers in place. I will mount a 50:1 right angle gear reducer in the center of the bin. This reducer will have a drive shaft attached to it that will extend horizontally to...

Thanks for the suggestion, but this unload can only be run with clockwise rotation.

Sorry for the slow response. I was out of town on a family get-a-way. Thanks for the link, berkshire. I don't believe the full live bottom type of unload would be practical in my application. ScottyUK, I have the Sumitomo representative's contact information for my area and will get in touch...

You are correct in assuming this bin was initially built for long term storage. We installed this unload system in it later to use for continuous cooling of grain out of a grain dryer. When the unload is working properly it is a first in first out type system whereas a typical farm bin unloads...

Mike, a major hurdle with putting any type of positive drive on the outside of the auger is the bin floor. It is a raised steel perforated floor. The other major issue you already mentioned is that the augers are turning way to fast. They would destroy most drive grippers or whatever you put out...

When we installed this bin unload system about fifteen years ago, it was installed on a trial type basis for our application. We have fought with it ever since. The augers were designed to propel themselves around the bin, not by the spacing wheels at the center and end but by the biting action...

That is a very good idea. Yes, I believe that I could go horizontally out the side of the bin. I will think about that a bit. Thank you!

Thank you for the suggestions. Something that I did not mention that makes this more difficult is that all of the drive components will be under about 15' of grain. Attached is a better picture of what it looks like. I believe installing a belt drive reduction would be nearly impossible. Grain...

Hello, I have a bin with a unload system in that I am trying to improve. This system has two screw conveyers that go out from the center of the bin. (see photo for more detail) While these screw conveyers are spinning, I would like to power rotate them around the bin. I have calculated that I...