Monoprice MP Select Mini E3D Hotend Adapter

Puts an e3d hotend on the famous $200 printer

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So, the hotend on your MP Select Mini 3D printer crapped out? You should have printed one of these out before you pushed your printer too hard.

The Monoprice MP Select Mini is the best 3D printer for the money, with one problem: you can't buy replacement hotends. Hotends are consumables, and eventually the hotend on this $200 printer will break.

Right now, the solution to a broken hotend on this printer is to spend another $200 to buy another printer. That's absurd, and any company that does that will quickly go out of business.

The solution? A 3D printed hotend adapter for the E3D V6. This should be the first thing you print on the MP Select Mini.

The print has been tested, it works. You'll need some M3 nuts and M3 socket head screws (M3 x 20mm or thereabouts).

The stock heater cartridge and thermistor can be reused with the e3d hotend. If you're looking for a 'buyer's guide', here you go:

The total comes to £41.40. I guess the adapter would work with a chinese e3d clone, so if you only have $10, get one of those.

Standard Tesselated Geometry - 624.55 kB - 07/04/2016 at 20:04


scad - 2.47 kB - 07/04/2016 at 20:04


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  • 1 × Printed parts STL in project files
  • 4 × M3 nuts
  • 4 × M3x20 socket head screws

  • Hot End Mount

    Benchoff06/11/2016 at 19:35 0 comments

    This should be the first thing you print on the MP Select Mini.

    .STL available in the project files. Four M3 nuts and four M3x20 bolts are required.

    Just print this out and tape it to the back of your machine.


    Because the MP Mini uses a standard thermistor and heater cartridge, you can reuse the stock thermistor and heater cartridge in an e3d hotend. This means a better hotend is a drop-in replacement, without needing any firmware updates or anything.

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Jamie wrote 02/10/2017 at 02:01 point

How come ever since I installed the new hotend my printer boots up saying immediately that the hotend is at 320 Celsius? What am I doing wrong? I need help ASAP

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samhinton22 wrote 01/08/2017 at 06:01 point

Will the fan that comes with the printer work with the E3D V6 hotend or do you need a different fan?

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jon wrote 01/01/2017 at 00:50 point

For anyone trying to figure out how to remove the original heatsink, there are two bolts behind the horizontal band.  If you remove the small spring tensioner  on the band then there is enough wiggle room to push the black band down and insert a hex wrench without tearing the entire printer apart.

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Tom Smith wrote 11/03/2016 at 02:35 point
Could you please share your slicer settings for running PETG on the MP Select? The stuff in the project photos looks great, but so far I've been getting unsatisfactory to abysmal results with Makergeeks filament.

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will wrote 10/04/2016 at 21:31 point

Got a new bracket printed for when the hotend fails.  Thanks for the work in making it available.  Makergeeks PETG was a great suggestion!  I have reprinted a few things already just so it would be make of the better plastic. Mainly the filament pressure control arm (which everyone should print now as well since my was cracked and they really are not that strong to begin with).  I am curious if you have a layer cooling fan on your Monoprice mini.  Or do you just use the blue one that came with the hotend without a layer cooler?  Thanks for your info

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carlos.j.hidalgo wrote 04/14/2017 at 18:24 point

Where did you get the .stl file for the pressure control arm?

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Owen wrote 09/03/2016 at 05:04 point

I'm completely new to all of this, but gauging my level, as a complete noob, what does the full replacement look like? I'm excited but worried about possibly ripping this printer apart, but I definitly don't see any screws on the stock heat sink, how would I remove that?

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Zach Reneau wrote 08/15/2016 at 18:53 point

The adapter required some massaging to get it to fit. It was a bit too tight around the heat spreader, but it worked. What I found though is that E3D recently moved to a custom thermistor, so it's not quite a drop-in replacement hotend. I really recommend that if when you order your kit, you just get the deluxe kit with all parts and avoid the headache of paying/waiting on two shipments from England.

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Stephen wrote 07/22/2016 at 04:25 point

Where can I get some of that green filament used in the photos?

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Benchoff wrote 07/22/2016 at 04:28 point

That color is MakerGeeks PETG 'Green Grass'. Yeah, the MP mini prints PETG

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Stephen wrote 07/22/2016 at 04:30 point

Thanks! I am printing the part as I type

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Stephen wrote 07/22/2016 at 04:31 point

Is it normally around ~$30? It says it is on sale from $80!

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ben wrote 07/30/2016 at 12:49 point

Any tips for printing with PETG? I seem unable to get clean prints -- tend to get long strands of stuff everywhere. Temp not high enough, perhaps? 

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B M White wrote 07/16/2016 at 14:23 point

I printed at 20% infill and 0.1 layer height. Is that sufficient?

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Benchoff wrote 07/16/2016 at 23:54 point

Should be.

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stevegigl wrote 07/11/2016 at 00:36 point

Um, did an older version get posted?  The holes on the base part don't line up with the smaller bracket part.  Currently downloading OpenSCAD to see if maybe Cura is doing something wrong.

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Benchoff wrote 07/11/2016 at 01:06 point

There was an older version with messed up holes. I just downloaded the current version, and it's correct. Can I see a pic?

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stevegigl wrote 07/11/2016 at 01:31 point

Hey, look at that, when I re-download today I get what looks like the right hole pattern!  Sorry for the confusion.

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Duality wrote 07/09/2016 at 22:28 point
don't you need cooling on the e3d or did you take the fan of for demonstration purposes ?

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Benchoff wrote 07/09/2016 at 22:35 point

Yeah, that's a demo. Dont' run an e3d without the fan.

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Charles.Shay wrote 07/02/2016 at 07:28 point

Saw this video, and now I can control my MP Select Mini remotely thru wifi with Repetier-Host. 

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jay wrote 06/16/2016 at 14:11 point

Is it okay to use PLA for the adapter?

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Benchoff wrote 06/16/2016 at 17:04 point

It should be.

This isn't a perfect design, but it will work well enough to print a *better* hotend mount. 

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Adam Vadala-Roth wrote 06/14/2016 at 02:54 point

did you do what I did and got a cheap monoprice printer as a bootstrap to a dope coreXY reprap ? lol

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Benchoff wrote 06/14/2016 at 10:34 point

It took a month to print all the parts for a d-bot on a larger and faster machine...

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Adam Vadala-Roth wrote 06/16/2016 at 21:20 point

word! A whole month though? thats intense.

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impulsecss wrote 06/13/2016 at 05:51 point

sorry, dumb do you propose the fan attaches?

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Benchoff wrote 06/13/2016 at 10:09 point

It clips on to the e3d

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Alex Rich wrote 06/12/2016 at 00:20 point

Does this machine really work?  It's almost too cheap not to buy and try it.

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Robert Gouge wrote 06/13/2016 at 02:13 point

It is my first 3d printer.  After a few days trying to level to bed, it is really a great little machine.  I'm sure it wouldn't have taken a few days to get the bed and setting dialed in if this wasn't my first machine.

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Ted Yapo wrote 06/11/2016 at 11:13 point

One of these printers arrived on my doorstep Tuesday ... perfect timing!

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