Hand-cranked dual-blade fan - Free 3D Print Model

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phaeozem

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Hand-cranked Fan - Dual Blades v1.1

Designer

8.4 h

6 plates

4.5(35)

Open in Bambu Studio

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988

320

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Description

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This is a hand-cranked fan with a dual-blade reverse design, a new attempt, perhaps for greater airflow?

Model dimensions: 220*140*100mm, handle internal dimensions 65*35mm

Gear ratio: 1:4 (1 crank rotation = 4 blade rotations)

Blade diameter: 138mm

It is recommended to use PETG filament for printing the blades. Please refer to the GIF for installation steps. Lubricant can be used as appropriate (WD-40 spray recommended)

Notes:

1. If the filament has many burrs after printing due to moisture, please sand the rotating contact surfaces smooth

2. Pay attention to the blade installation direction. The side with the chamfered hole, where the wider part of the blade (contacting the build plate) is the bottom surface!

3. The wind speed test is shown in the GIF below. Please print according to your physical condition as appropriate

If you like this type of model, you can choose to purchase theDual-Blade Hand-Cranked Fan 2.0. Compared to Generation 1, it has a higher gear ratio, faster speed, wider blades, and greater airflow.

Updates:

Version v1.1 (2025/5/22)

1. Increased blade diameter to 138mm, airflow improved by approximately 10%

2. Modified transmission gears to increase the gear ratio to 1:4

3. Due to the change in blade size, the blade spacing was also modified to accommodate it

4. Due to the adjustment of the tapered transmission gear size, the mating tapered transmission gears, fan shaft, spacers between the blades, and housing – if these components were printed in v1.0, they need to be reprinted. The assembly method remains unchanged

Version v1.1 (2025/5/27)

1. Some users reported questions about the installation steps, so the installation instructions have been revised

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Hope this model is helpful to you. Thank you for your likes, praises, and support!

v1.0 Installation Diagram:

Comment & Rating (70)

@3DCrafts

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Hand-cranked Fan - Dual Blades v1.1

hard to move at first but I put a little oil in it and now it works perfect

@midexlab

Where does the oil go

(Edited)

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@ToughsnailYT

i hope no babyoil

(Edited)

@koolki2sk8

Replying to @ToughsnailYT :

da oil from da bebe

@Lucky63

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Hand-cranked Fan - Dual Blades v1.1

The clips are excessively thick and obscure the propeller shaft; they are incompatible.

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@phaeozem

Which part?

@Lucky63

Replying to @phaeozem :

The clips securing the propellers are difficult to insert The two clips on the upper and lower axes are also too thick, causing significant friction during use

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@HoofiePuppet

Fantastic. Takes a bit of lubricating, however. Fun build!

@kyooo15

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Hand-cranked Fan - Dual Blades v1.1

very good design but bit hard to assembly, working great just still a piece left on the side😂

@morlizer

It went well to assemble using the pictures. The locking rings are difficult, used pliers. Getting it to spin was difficult. Applied some PTFT (silicone bike lube) to all moving parts and it worked really well

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@jospark

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The best hand crank fan. some suggestions: loosen the tolerances for the fan shaft. I made the fastener pins thinner to 1mm. also, a lip at the base would help it stand up better.

@ThinkDunson

i increased the size of the base and rods by a small amount, and now everything fits together perfectly with minimal friction. the airflow is decent... about as good as i would expect. if you printed as-is and trying to turn it, it's way too tight and has tons of friction. if that's the case, i can see how people would be complaining of low airflow and broken teeth, as they're struggling to make it spin. (i increased the main body and its covers by 1%, and i increased only the lengths of the rods by 0.35mm for the blade shaft, 0.60mm for the main shaft, and 0.27mm for the crank shaft; which matches the 1% increase for those areas of the body.)

(Edited)

@heruyoru117

This is very good data, I printed it enlarged and it worked

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@pnwnerd

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Hand-cranked Fan - Dual Blades v1.1

This is well architected and constructed. The tolerances are a bit tight, but after some use, the fan became easier to work with. I did end up re-printing all of the pin holders ("U-shaped" parts) in TPU so they would bend a little bit. I ended up breaking multiple of them before I decided to do this. I did print with ABS GF (Had it from anniversary 50% off sale) and it came out very nice!

@user_796222349

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Hand-cranked Fan - Dual Blades v1.1

hard to assemble but worth it and when you turn it the cran crank will screw it self in

License

This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.

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