Anycubic i3 MEGA Rear Blower

by CuriousTech, published

Anycubic i3 MEGA Rear Blower by CuriousTech Nov 22, 2017
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Updated to version 2, with correct diagonal airflow. The original was blowing almost completely horizontal.

Rear 40mm fan to blower duct for the i3 MEGA Ultrabase, and suggestion for replacement of noisy fans in the base.

I used 2 Scythe Mini Kaze SY124010L for the stepper drivers. Just use the original fan screws, and the original fan plug and included adapters to make a Y-adapter. The Scythe SY602012L will fit the PSU. The SY124010L will also fit the hotend blower, so 3 4010s. The rear blower is using a 4015 size for more air since the Scythe is only 14 CFM, but it might actually work fine.

Update 11/25: Added optional side cover and duct. Uses the original screws, but puts them on the inside. The nuts can be used for the rear blower. It needs longer screws, like M3x7 or 8.

50x15 v2: The fan sticks out on the right side some, so it can't fully travel to the right of the bed, unless the mount is cut off. It's about 8 mm from the edge.

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ok... so...what's the best for i3 mega ultrabase? I've got the ultrablower v2 ... but it has little airflow. tnx and sorry for my english.

Take your pick. I can't really say one is better. They all work as far as I know.

thank you that you made the " cooling fang " of the 50mm blower fan bigger, so that the V6 heatend will fit :))

Sorry me again - the blower collides with the bearing clamp, what did i do wrong?

That's really odd. Is it the ultrabase version? Should that matter? Did you check out the 50mm blower?

Yes it´s the ultrabase version.
Should that matter - Maybe?
I didn´t check the 50mm blower yet, because i had the 40mm already printed and i can´t print at the moment.
But it really doesn´t look like it would fit...

It might fit. Here's the 50mm in black and 40mm in blue. It has a little more clearance around the bearing. I have the ultrabase as well though, so I would just expect it to fit. I might need to design the 40mm like the 50mm. The 50x15 is quieter and pretty good with a 27 ohm resistor, but I can probably get the same out of a 50mm axial.

I like the 40mm design better, the angle is more flow efficient...

I think you dont need the internal air splitter. Air should distribute evenly itself

You're right. The intake is much larger than exhaust so really it's just going to blow out all the holes evenly. Directing it at the hole is all I can do. It was there to help the bridge as well.

Sorry - but this ain`t printable at layer heights 0.1 & 0.15mm cause the blower doesn´t have a flat 1 layer...

Sorry about that. What's the minimum you can print? I've printed at 0.1 and 0.15 but I'm using Cura.

I`m printing at 0.2mm right now looks good, but had 5 fails at 0.1mm & 0.15mm with Simplify3D before i found out what caused it. :(

edit: would it be a big problem to change the blower to fit a 50mm fan ?

I see, it has different heights in the bottom layer. I'm fixing that now. I think I can do a 50mm fan too but it'll take a few days.

Thank you in advance...

Added. It's a bit thin but printed fine.

And thank you again... ;)


It's for original hotend or for e3d v6? thank you and good job

Thanks. It's for the original. If the E3D v6 is taller, it might still work.

v6 is shorter ... so it's not working for it :(

About how much shorter? I can probably raise it slightly without hitting anything. The reducer in the back was really close to the bearing though.

Hello mate can this be printed in PLA ? great design

Thanks! It can be, but it gets fairly hot. I printed it in PLA. If I push up/down hard on the right tip it can bend, but it doesn't droop on its own. It definitely doesn't handle higher temp (ABS) printing. I think I should have made it wider, but will print in ABS eventually.