40mm Fan Duct for Rostock

by Highcooley, published

40mm Fan Duct for Rostock by Highcooley Jan 23, 2013
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A remix of Maurits' fan duct, designed for Rostock style printers to attach a 40mm fan. It is designed to work with Jason's LED ring (http://www.thingiverse.com/thing:32472) and is set for the proportions of Steve's hot-end for the Rostock Max.

Version 2 is much easier to print, gives you a choice of two different mounting plates and allows for fast removal of the duct for maintenance of the nozzle.

Edit 12.03.2013: Both versions are designed for the first gen nozzle! They don't necessarily work with "THE NEW" nozzle!


Print it aligned flat on the fan mounting flange. Prints well in PLA and does not melt if properly adjusted (I used a lighter to slightly heat the mounting bracket to fine adjust the position in height).

It should print without raft or support. Maybe you need to tape or weigh the fan mounting flange down mid print, to prevent the part from seperating from the build plate.

Use the mounting plate which fits to your build. The duct is meant to be mounted on one of the deep corners of the hot-end platform. Use a 1mm metal pin to attach the duct to the mounting plate (e.g. from a paper clip).

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Very nice design.. but its not printable without a fan.. and was printing this because i need a fan for my Rostock.

Thank you! I actually printed mine in PLA with this little fan bracket: http://www.thingiverse.com/thing:40845http://www.thingiverse.com/thi... (the version with the obtuse angle). What you can do is sit a slow turning fan next the print bed to have at least a little draft. And of course print slow. At least for me it worked like that. Keep in mind, that this design only works with the old (longer) nozzle.

4cm hot-end fan Mount for Rostock

I printed mine with ABS, works perfect without support if you use a hairdryer for a little cooling in de end. But finaly i have a Fan Duct for my printer. Thanks :)

would have been cool if it was in a parametric scad so we could enter the mount vs nozzle height and nozzle diameter to get a custom one.

Yap, I know. This was my first intention as well. But I messed up a couple of things along the way, so it became literally impossible. Aditionally, Splines are quite hard to parameterise. But fortunately, there are a couple of other new designs out, which fit better to the Max as this one.

Darn, so no plans to revise design to work with newer nozzles? Could you upload the source so I could try playing with the model to tweak it to work? I was just about to print this when I read that it isn't compatible...

Love the design, printed it off and then found that the clearance is wrong for the new SeeMeCNC nozzles! Any chance this thing could be 2mm narrower?

How much clearance do you have? Min is just 3 mm. An earlier design only had 1 mm which caused the nozzle to melt and sometimes stick to the heating block. This was due to it vibrating up and down during fast prints. I gave up on this design with the new nozzle, as I wasn't able to fit everything underneath the heating block. Unfortunately, I didn't come up with another solution so far. I use a simple fan bracket with a fan slightly tilted inwards blowing towards the bed. One idea would be to integrate a duct into the LED ring. However, this would be a rather complicated design and I don't have a nice solution to rout the cable and the air stream yet.