Section summary |
---|

1. How to
calculate the tip speed of a mixing tool |

2. Why to
calculate tip speeds ? |

The tip speed of the mixer's agitator - sometimes also called mixing tool - can be calculated the following way

**Equation 1 : Tip Speed calculation**

With :

- R is the radius of the mixing tool (center of shaft to tip of paddle) in m

- n is the mixing speed in rpm

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The tip speed of the mixer is a very important data to determine
the mixing regime thanks to the Froude
Number but also to verify **that the agitator speed is not
exceeding 1 m/s whenever the mixture in its explosivity range**
(ATEX),
typically when loading and discharging the mixer. The mixer speed
in rpm at which the tip speed equals 1 m/s is called the ATEX
speed of the mixer.