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David Bradley Grinding Corn


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#1 VSTROM803 OFFLINE  

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Posted July 28, 2013 - 04:26 AM

 

Not my video but, I thought it was cool.

 


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#2 KennyP ONLINE  

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Posted July 28, 2013 - 05:57 AM

That's pretty neat!



#3 JDBrian OFFLINE  

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Posted July 28, 2013 - 06:26 AM

It must take some fussing to get those long belts lined up and tensioned properly. I would think it would have a tendency to run off the flat pulley. Those DB's really were a versatile setup.  



#4 Amigatec OFFLINE  

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Posted July 28, 2013 - 06:56 AM

I was waiting for the dog to get his tail wrapped up in the pulley.

#5 Guest_gravely-power_*

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Posted July 28, 2013 - 09:04 AM

It must take some fussing to get those long belts lined up and tensioned properly. I would think it would have a tendency to run off the flat pulley. Those DB's really were a versatile setup.  

Those pulleys are not flat. They are high in the center.



#6 Lauber1 OFFLINE  

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Posted July 28, 2013 - 11:49 AM

Those pulleys are not flat. They are high in the center.

 

Actually the DB tractor pulley is flat, but the one on the grinder is raised. An old book I have here some place, says that you only need a raised pulley on one end or the other, to keep the belt tracking right. The hard part I ever had was keeping the two machine from getting closer together, usually have to anchor one or both of them.



#7 Guest_gravely-power_*

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Posted July 28, 2013 - 12:06 PM

Actually the DB tractor pulley is flat, but the one on the grinder is raised. An old book I have here some place, says that you only need a raised pulley on one end or the other, to keep the belt tracking right. The hard part I ever had was keeping the two machine from getting closer together, usually have to anchor one or both of them.

That is correct. I should have been more specific. I own several of these that I run with my hit and miss engines. I have also found that the longer the belt the easier and smoother they run.



#8 JDBrian OFFLINE  

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Posted July 28, 2013 - 08:15 PM

That is correct. I should have been more specific. I own several of these that I run with my hit and miss engines. I have also found that the longer the belt the easier and smoother they run.

I guess it acts as a better shock absorber when it's longer. it filters out any vibrations that set up resonances in the belt.  The longer the belt the lower the cutoff frequency. At some point it filters out all the vibration and it runs smooth. In the case above you aren't using much HP. It seems to me that a longer heavier belt would provide more tension simply due to it's own weight on the pulley allowing more power to be transferred before slipping. 






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