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Tech Breakdown: Mosquito Hotend | MatterHackers

A revolutionary new hotend that helps scale back warmth creep to nearly zero utilizing a cutting-edge design.

Posted on November 5, 2018


Taylor Landry

The Mosquito Hotend will not be like several hotend you’ve seen earlier than. When you’ve ever had a hotend leak filament out of the heater block, struggled with each palms to take away a nozzle whereas the hotend is sizzling, or damaged a warmth break since you twisted too arduous, then you already know what Chris and Dan from Slice Engineering are speaking about. After experiencing that irritating means of swapping nozzles on the most typical hotends discovered on most 3D printers, Chris and Dan determined to do one thing about it.

Following the “kind follows operate” mantra, they designed the Mosquito from the bottom as much as tackle a number of the most irritating points that extra typical hotends face.


Typical all-metal hotends look much like this:

The skinny-walled warmth break is the one structural part between the heater block and the warmth sink. So, you have to be very cautious to assist the heater block when putting in or eradicating a nozzle. You should even be very cautious to not put any lateral forces on the heater block or nozzle.

The Mosquito doesn’t have this drawback. As a substitute of a single, structural warmth break, the Mosquito has 4 thin-walled stainless-steel surgical tubes on the corners of the warmth block, and a non-load bearing warmth break. As a result of the warmth break will not be load bearing, it may be a lot thinner than a standard warmth break that should assist the heater block, nozzle, heater cartridge, thermistor, and the forces which can be appearing on a hotend. That is wonderful for hotend efficiency. It permits for a really steep temperature transition between the warmth break and the soften zone.

This thin-walled warmth break is a key issue to the efficiency of the Mosquito. And by skinny, we imply actually skinny…

A typical warmth break has a wall thickness round 3mm. The Mosquito is about 20 instances thinner than a typical warmth break! Because of this considerably much less warmth travels up the warmth break, which, in flip, reduces the necessity for a big warmth sink. Much less cooling demand additionally means you need to use a smaller fan. The Mosquito solely wants a tiny 25mm fan to maintain it cool versus the usual 35mm or 40mm followers discovered on most hotends. This makes the entire hotend meeting extra compact, and it runs quieter.

Slice Engineering states that their warmth break conducts 85% much less warmth into the warmth sink than a conventionally threaded warmth sink. As a substitute of a big, cylindrical aluminum warmth sink, the Mosquito has a small copper warmth sink that’s jacketed over the warmth break tube close to the heater block. Copper is almost twice as thermally conductive as aluminum, so it transfers warmth higher and also you want much less of it to get the identical cooling efficiency as an aluminum warmth sink.

This can be a thermal imaging seize exhibiting the very steep thermal gradient of the Mosquito. That is wonderful for a hotend!


This materials choice was no accident. Reasonably than simply selecting the most cost effective materials out there, every materials on the Mosquito was chosen for a particular function. Slice Engineering states that materials choice was on the coronary heart of their design course of. This brings us to the heater block. Normal heater blocks are aluminum which softens and deforms simply at temperatures above 290C°. The Mosquito has a copper alloy heater block that they declare is not going to soften at temperatures above 550C°. We didn’t check it as much as 550C°, however we did warmth it as much as 400C° and alter nozzles just a few instances – each with brass and hardened metal nozzles. We noticed no thread deformation or any indicators of damage which can be widespread for typical heater blocks at that temperature.

Simple Nozzle Adjustments

For individuals who have struggled with altering a nozzle, it will in all probability be your favourite function.

No extra holding the heater block with one wrench and making an attempt to tighten/loosen the nozzle with one other. The Mosquito makes one-handed nozzle modifications doable. Additionally, due to the fabric choice and the design of the warmth break and heater block, there’s no must warmth up the Mosquito to tighten the nozzle.

Don’t do this with different sizzling ends until you desire a damaged warmth break or a heater block that’s flooded with filament.

Filament Swell

When you’ve ever had hassle pulling PLA filament out of your sizzling finish due to the ‘bulb’ of filament on the finish, then you might be aware of filament swell.

The distinctive warmth break on the Mosquito doesn’t simply have wonderful thermal properties. The precision tubing has a lot tighter tolerances than PTFE tubing. PTFE tubes can typically have an inside diameter exceeding 2.1mm. With PTFE tubing, your 1.75mm filament has room to swell 20+%. Not so with the Mosquito. The tight tolerance of the warmth break that extends all the way in which to the highest of the warmth sink ensures that your filament cools and doesn’t swell sufficient to trigger points along with your filament path.


With the cutting-edge design that Slice Engineering has integrated into the brand new Mosquito hotend, there are lots of nice causes to improve your 3D printer with one. From the convenience of use to altering nozzles shortly, to the low charge of warmth creep and the consistency of the goal temperature in your hotend; all of those benefits offer you extra accuracy in controlling the circulation of filament deposited on the print, providing you with higher prints and decrease failure charges.

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