Micro-fan, for motors with 3.17mm shaft
As of April 2026 · Prices incl. VAT unless stated otherwise.
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Delivery time on request.
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Free shipping on orders over 129 EUR (within Germany, excluding product-dependent surcharges!)
Micro-fan, for motors with 3.17mm shaft
Micro-Fan, for 3.17mm motor shaft
While the trend is clearly towards large impellers, there has been a consistent demand for a powerful micro fan.
This impeller, again designed by Ulf Herder and manufactured entirely using CAD/CAM, has an inner diameter of 50mm and accommodates motors up to 25mm in diameter.
The rotor is attached to the motor shaft using an aluminum collet. The collet is available with 2.0 mm, 2.3 mm, 3.0 mm and 3.17 mm bores for all common motors.
The impeller was designed for the Robbe Power 330 motor, with which it produces approx. 200 g of thrust with 8 (small) cells.
In terms of strength, the use of powerful brushless drives, such as those offered by Lehner, Hacker or Astro, is also possible without problems.
Since the impeller operates at very high speeds, we recommend using motors with ball bearings, such as the MPX Permax 280 BB. For batteries, GP 1100 cells are sensible for single-motor models, and especially GP 2200 cells for twin-motor models.
The impeller is supplied without an intake ring. The intake must therefore be provided on the model.
The optimal nozzle should have a diameter of approx. 40mm.
Why Der Himmlische Höllein?
An excerpt from our FAQ
How long is the processing time?
The processing time for orders where all items are in stock is a maximum of 24 hours. If products are missing from your order, we will immediately send you an order confirmation with a delivery date for the missing items.
Do you also ship internationally?
Of course, we also ship internationally. You can find more information under Shipping Methods.
How can I return it?
You can return purchased items within the statutory withdrawal period. You can find more information on this in the Widerrufsbelehrung (right of withdrawal policy).
