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Farmall & IHC Tractors Discussion Forum
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Cream Separator RPM?

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Larry Kastens

04-06-2005 23:28:10




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Does anyone know what the bowl rpm is for a McCormick-Deering cream separator? One of our club members has restored one and can"t get it to work. He thought maybe the cranking speed was too slow or too fast.
Larry Kastens
Power from the Past
Tucson, AZ




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JB2

04-07-2005 19:32:32




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 Re: Cream Separator RPM? in reply to Larry Kastens, 04-06-2005 23:28:10  
Hi Larry, the handle had to turn at 60 RPM and as someone else said these was a ball in the handle that would stop dropping and hitting the end cap when the handle was turned at the correct speed. Besides requiring raw milk the very top disk, that is the one that is different from all others has to small holes in the top part that goes around the central shaft. These holes must line up will the holes in the outer cover of the bowl. This is where the cream comes out and the adjusting screws for the thickness of the cream are. There used to be a key that was soldered onto this top disk that would fit into a key way in the outer bowl cover but after several years this key would fall off and the hole alignment had to be done by eye.

Good luck
JB2

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Paul in Mich

04-07-2005 18:57:10




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 Re: Cream Separator RPM? in reply to Larry Kastens, 04-06-2005 23:28:10  
Larry, I almost hate to ask this question, but are you by chance trying to separate homoginized milk? If so, that wont work. YOu need fresh whole unpasteurized, non homoginized milk. Aside from that, the disks do need to be in order, and if the separator is manual, one turn per second is correct. That makes it 60 per minute.



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farmalljim10

04-07-2005 04:54:49




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 Re: Cream Separator RPM? in reply to Larry Kastens, 04-06-2005 23:28:10  
I have had about 8 different ones in my life and they all needed to be cranked at about 55 to 60 rpm ...Try to make sure its (the discs that is ) put to gether right and the set screw on the top of the bell sets how thick or thin the cream is...



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gene b

04-07-2005 04:28:34




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 Re: Cream Separator RPM? in reply to Larry Kastens, 04-06-2005 23:28:10  
Are you using raw pure milk? We turned the hand crank about 55 rpm. Some even had a little wt on the spoke to make a click so you new how many rpms you were turning. Do you know what brand the cow is as some have a very low butterfat content in their milk.



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Randy in NE

04-07-2005 04:23:16




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 Re: Cream Separator RPM? in reply to Larry Kastens, 04-06-2005 23:28:10  
It has been about 40 years since I was around any kind of cream separator. I have never been around a McCormick-Deering one. If it is spinning too slow I would think that you would be getting a lot of cream in the milk output. If too fast then you would be getting milk in the cream. I remember on our separator that it was important to get all of the disks in the right order. Thicker ones on the bottom and thinner ones to the top. If the motor is running properly there is only one speed that it can run. If the drive and driven pulleys are the right size then the bowl should spin at the correct speed. The most likely speeds of the motor is in the neighborhood of 3600 rpm or 1800 rpm. The actual speed will be a little less than this due to the operating principles of an induction motor. If the motor is ok then it should not get warm/hot to the touch after running it for a prolonged period of time. If there is a problem with the windings then it would be highly likely that the motor would be getting hot.

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