3450 RPMs. We think that question misses the point. Faster is not necessarily a bad thing, and "slower" is not necessarily a good thing. See comment below.
Lets Examine this, its generally thought that:
Speed causes heat, this is not true.
Friction causes heat.
If friction is reduced then heat is reduced.
What causes Friction?
Friction is the resistance that one surface or object encounters when moving over another. In this case the cutter, the vegetable and the juicing grid.
As an example a dull or inefficient cutter will add a lot of heat.
Too small a grid will add heat.
What this means to us is that the temperature of the pulp is directly related to the efficiency of the cutting system. The better the system the less loss in energy (work).
Since no system is 100% efficient it is defined by the First Law of Thermodynamics which states:
The change in energy in a system is equal to the heat added to the system minus the work done by the system.
Right now eyes are rolling back and I am losing you.....Stay with me.
But wait you say, "what has this got to do with my carrots and kale?"
EVERYTHING.
In physics this is described as efficiency. If two rotating parts are:
100% efficient, no heat is generated
If, 80% efficient than 20% of the work is converted to heat.
So the most important thing is to make the most efficient system possible. Speed is only one variable in a very complex system.
I maintain the Pure Juicer has the most efficient Cutting System of any Juicing System because I measure consistently low mash temperatures. So regardless of the speed, 86rpm or 3000rpm I maintain the PURE adds the least heat to the pulp than any other juicer.
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