Fan guard retaining pin for Replicator 2

by whpthomas, published

Fan guard retaining pin for Replicator 2 by whpthomas Jan 4, 2013
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Every time I unscrew the heat-sink fan screws to remove the stepper motor, I find the fan guard flops about and gets in the way. So I have created this retaining clip that simply snaps into place and holds the guard firmly against the fan regardless of whether the retaining screws are removed.

I recently upgraded my fan to a 24v 40 x 40 x 10 mm ball bearing fan which has a higher CFM air flow but lower RPM - so its much quieter. Highly recommended upgrade!

This clip was designed using an ACIS solid in Shark FX (sfx file included) so will behave well with Makerware, ReplicatorG and skeinforge.


I printed this with my 100 micron profile http://www.thingiverse.com/thing:39050

Infill 100%
Layer Height 0.1mm
Number of shells 1

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The screws to attach the guard to that fan are really common. Ask anyone who works in a PC shop that builds systems. They will have hundreds of them in a bin.

Same issues here...didn't fit into the fan (was too wide).

Hay, just got the pin to work on stock fan with scaling of 88% and then a non uniform lengthening to 18.96 in MW:)

not quite fitting my stock fan...is this only for the upgraded fan?

Try printing a bit leaner by increasing the filament size by 0.5mm

i'll try that, thanks!

Where did you get the new fan??

Hop on eBay and do the following search "24v 40 10 ball bearing fan" and you should find one. My fan is an ADDA brand I purchased locally form a computer repair/electronics store.

I wired it up by carefully removing the stubs from the connecting block - noting the polarity by marking the red side with a + using a sharpie. This was done using a jewellers screwdriver to press down on the tabs that lock the stubs in place while pulling on the wire at the back to remove the stub. I then cut the wires and teased open the crimped retainers with some fine needle nose pliers. Pulled out the left over plastic sheath, tinned it with some solder using a constant temp soldering iron and inserted the tinned tips of the wires from the new fan. I threaded the wires through one of the mounting holes on the fan to help keep the wires better organised. The stubs just pushed back into the connector block.

This thread google groups thread provides some good info about the merits of different types of fans