1. Gather the nozzle, heater block and heat break:
    • Gather the nozzle, heater block and heat break:

      • Nozzle

      • Heater Block

      • Heat Break

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  2. Before starting work on your heater block, make sure that you'll going to screw your nozzle into the correct side.
    • Before starting work on your heater block, make sure that you'll going to screw your nozzle into the correct side.

    • You should be looking at the side of the heater block with three holes in it

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    • Screw in the nozzle all the way into the heater block. Don't worry about tightness yet.

    • Then, unscrew the nozzle by a 1/4 of a turn. This will leave a little space to tighten after screwing in the heat break.

    these instructions - steps 3-5 - don’t really work on an Aero since they lock the heater block to the heatbreak, and therefore also to the heatsink in a fixed and arbitrary rotation . If your final heater block orientation matters to you then you need to screw the heatbreak into the heatsink first. I wrote a more detailed explanation but it’s too long to post here.

    parenthetical - Reply

    • Screw in the heat break until it touches the nozzle.

    • Tighten the nozzle against the heat break. No need to over tighten, we'll be hot-tightening later.

    I don’t see a hot-tightening step below. How is the hot-tighten supposed to work?

    Neilen Maris - Reply

    • Double check that your nozzle is still almost flush with your heater block.

    • If there is significant space between the nozzle top and the heater block you should re-adjust your nozzle and heat break to eliminate that space.

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    • Gather the parts you'll need to install the thermistor:

      • Thermistor Cartridge

      • The Smaller, 1.5mm Hex Wrench

      • M3 Grub Screw

      • Heater Block

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    • Slide in the thermistor cartridge.

    • You can slide the cartridge in either direction so that the wires extend from one side or the other of your heater block. Think about how you'll be organising your wiring to decide which makes sense for your printer.

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    • Screw in grub screw until it just touches the thermistor.

    • Tighten M3 grub screw by an 1/8 of a turn.

    • Do not over tighten the screw. The thermistor cartridge is soft, and you might deform it if you over-tighten the screw.

    I’ve noticed that while the hot-end is hot (215 C), the thermistor can freely slides out, indicating that the contact is not very tight (I have not touche the M3 screw since receiving the extruder as part of my Prusa i3 MK2S).

    Given the warning above I assume I should not try to tighten the thermistor while the hotend is hot since it will deform it when it cools down?

    (Indeed I don’t have any problems with the current setupas as PLA melts at 205C/215C as reported by the thermistor, indicating it’s accurate even though it is not tight when hot).

    Udi Finkelstein - Reply

    • Before you install your heater cartridge, you should double check that you both purchased and received the correct voltage cartridge. This process is less annoying than putting out a house fire.

    • Your heater cartridge will be either 30w or 40w, with blue and red wires receptively.

    • If you have a 12v heater cartridge, your resistance reading will be (about) 3.5 or 4.8 Ω for 40w and 30w respectively.

    • If you have a 24v heater cartridge, your resistance reading will be (about) 14.4 or 19.2 Ω for 40w and 30w respectively.

    Either the text or the picture need to be corrected.

    The example picture says that a resistance 5.2 ohms is ok for a 24v heater cartridge at 30 watts (due to the blue insulated wires shown).

    However the text contradicts this for 24v heater cartridge saying that the resistance of a 24v 40 watt heater cart should be about 14.4 ohms or about 19.2 ohms for a 24v 30 watt cart.

    The 4.8 ohm resistance of a 12 volt 30 watt heater cart in the text is a closer match to the 5.2 ohms in the picture!

    Jonathan - Reply

    • Gather heater block, heater cartridge, 2mm hex key and M3x10 screw with washer:

      • Heater Block

      • Heater cartridge

      • 2.5mm, Hex Wrench

      • One of the longer M3x10 Screws and M3 Washer

    this step says to use the 2.5mm hex wrench, step 12 says use the 2.0mm hex wrench. the smaller 2.0mm hex wrench is the correct one

    Garth - Reply

    Thanks a lot! I’ve fixed the guide.

    Gabe S. -

    confirmed - it should read 2mm

    parenthetical - Reply

    Thanks a lot! I’ve fixed the guide. Good catch!

    Gabe S. -

    You should specify to use the flat washer, not the shake-proof washer, as that’s needed in a later step. In my kit, the shake-proof washer was packed in the same bag as the M3x10 screws, but the flat washer was in a separate bag.

    bruceb - Reply

    • Slide in the heater cartridge. Typically you'd want the wires to come out the same side as your thermistor wires.

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    • Tighten the M3 x 10 socket dome screw (with the M3 washer on it) with 2 mm hey key until the clamp deforms slightly (as shown in the second picture).

    • Gently tug the heater and thermistor wires to check they won't slide out

    In step 10 you mention “the Larger, 2.5mm, Hex Wrench” so maybe this needs to be updated from 2mm to 2.5mm

    Simon hoeck - Reply

    • Before beginning your build, make sure that you have an appropriate mount for your extruder. If you have a commonly upgraded printer (Ultimaker 2, Taz 5/6, Prusa i3, etc) you'll likely be able to find 3D models of well designed Titan mounts on your favourite 3D model sharing site.

    • When installing the Titan, you must have something to separate the motor from the extruder body by 2 mm. Typically, a piece of your mounting bracket will attach here and provide this space (for reference take a look at our Prusa Mounting Bracket). Having a separation of more than 2mm will mean you need longer screws to hold the assembly together.

    • Please note that there may be extra bolts in the titan fixing kit bag that will be unused.

    There seems to be something wrong here. The instruction say that the motor must be separated from the extruder body by at least 2mm

    I designed my mount with a separation of 3.1 mm. This caused two problems:

    * First in step 16, the grub screw was below the surface of the body, I had to use calipers to measure where the top of the plastic gear was relative to the stepper motor, then disassemble the stepper motor, set the gear with the calipers, and then reassemble.

    * Second, the M3x30 screws provided to attach the cover to the assembly are two short.

    I believe that the instruction should read that the motor and extruder body must be separated by no more than 2mm.

    Back to Fusion 360 to redesign my mount.

    Rick DeNatale - Reply

    • Gather

      • The motor you'll be using + mounting bracket

      • Extruder Body + Large Gear

      • M3x8mm Screw

      • M3 Grub Screw

      • Pinion Gear

      • The Smallest, 1.5mm Hex Wrench, and Mid-sized, 2.5mm Hex Wrench

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    • Thread the M3 grub screw into the pinion gear slightly so you don't lose it

    • Slip the pinion gear onto the motor shaft with the grub screw facing down, towards the motor.

    • Slide it about 3/4 of the way down the shaft and tighten the screw.

    • The compact but powerful motor has a fully round shaft. - some of the older kits used the slimline motor which has a flat on the shaft.

    Under Incorrect Tools — The grub screw in my kit required a 1/16th” Allen. The included metric Allen would have stripped the grub screw socket. I recommend having this before beginning.

    Mike - Reply

    Confirmed on my build. Better not to provide anything than to provide these wrong tools.

    Stuart Wimbush - Reply

    1/16” allen on mine too, and my compact but powerful motor does not hav a fully round shaft like said above.

    Marcus Weckman - Reply

    • Take your M3 screw that you picked out before and slip it through the hole extruder body in the groove mount (lower leftmost screw hole).

    • Slip the screw through your mounting bracket (including spacer if you're using one) and screw it into your motor.

    “your M3 screw that you picked out before”? When did I pick this out? I don’t see it mentioned in the previous steps.

    Phil Hord - Reply

    In this step, it’s attaching the stepper motor to your bracket. Use the screw it’s talking about to sandwich together the stepper motor to the extruder body, with the mounting bracket in the middle. The m3 screw should bolt together the motor and the extruder at the lower left screw hole on your bracket.

    Chris d'Aunay - Reply

    Ignore my comment above- it should be the bottom right screw fitting, with the gears at the top right if you are looking at it. The e3d hologram should also be visible and readable (aligned correctly)

    Chris d'Aunay - Reply

    In this step you will almost definitely be inserting your mount (which you may well have printed or otherwise sourced apart from this E3D kit). Here are some photos of what mine looked like at this step, with my mount sandwiched in:



    Mount on Motor:


    Screw going in:


    I’d edit this guide and add my photos if I could, but I guess it’s locked for editing at the moment.

    James - Reply

    • Slot in the drive shaft (attached to the other gear)

    • You need to have the top of the pinion gear flush with the top of the drive shaft gear.

    • If it isn't—and it likely won't be on the first try—loosen the grub screw and adjust the positioning of the pinion gear on the motor's shaft. You may need to unscrew the extruder body to get at the grub screw.

    • When you think you've got it, try pressing down on the drive shaft lightly to see how it will fare when the whole extruder is screwed in and make sure it's still flush.

    These instructions don't really illuminate the larger picture, nor say what will happen if you don't align the pinion and drive gears.

    If the drive gear is too far out (away from the motor) it will pinch the idler arm against the heatsink and cause really excessive friction. You won't be able to see it inside the closed unit so you'll just wonder wtf is going on. (this is hinted at in step 30).

    If the drive gear is too close to the motor then it won't be making full contact with the pinion gear which could cause uneven wear or cause the pinion gear to run out of true, which would in turn cause the pinion gear to rub against the idler - again causing excessive friction.

    All this assumes that the pinion gear is correctly installed on the hob, there have been reports of that not always being the case, although it seems OK on mine.

    It is hard to know if you have it aligned correctly until you put the lid on tight and see if you can turn the pinion easily by hand. As in step 30. Test this early and often.

    parenthetical - Reply

    During this step it can be helpful to test-fit with the heatsink, having already inserted its bearing. The hob tends to tilt when only the back end is supported by its bearing, causing the side of the large gear nearest the pinion to change position relative to when it’s supported and aligned with both bearings.

    bruceb - Reply

    • Gather:

    • M4 Thumbscrew

    • OR M4 Button Head Screw

    • M4 Nut

    • Spring

    • Idler Lever

    • The only difference between the thumbscrew and the button head one is ease of use vs. space. If you can, we suggest using the thumbscrew.

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    • Screw the M4 nut all the way onto the M4 Screw or Thumbscrew.

    • Push the spring over the threaded part of the screw. The nut will eventually let you adjust the tension on your extruder by travelling down the screw and compressing the spring.

    • Position the other end of the spring on the little bump on the idler lever.

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    • Drop the thumb screw / nut / spring assembly into the extruder body.

    • The screw will slot into the nut-channel in the extruder body, and the idler arm will slip onto the motor shaft.

    • It is normal that the shaft sticks out slightly from the lever.

    • Make sure that the nut slots into the channel fully and that the idler arm is pressed all the way onto the motor shaft.

    • Your assembly may look like either photo above, depending on whether you're using the thumbscrew or the dome screw.

    • Do not compress the spring without the Titan lid on!!! It will go flying out and you will lose it. And it could hit someone in the face.

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    • Gather:

      • Titan Aero heat sink

      • Assembled Heater Block

      • Thermal Paste Sachet

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    • Apply the thermal paste to the heat break.

    • You don't need to use the whole sachet

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    • Screw in heat sink and tighten by hand—no need to over-tighten.

    • Wipe away any excess thermal paste.

    • Don't use thermal paste on any other parts of the HotEnd.

    • Wash your hands after working with Thermal Paste

    see my comment on step 3 that this should be done earlier.

    These instructions are correct that you don't want to overtighten, the throat of the heatbreak is fragile and you can twist it right off if you apply force with a tool.

    BUT when the whole thing heats up the heatsink seems to expand more than the heatbreak and it can become loose in use which you really don't want. So it needs to be firm at this point, but not tight enough to risk damaging anything.

    A suggestion I have seen and support although I haven't tried it yet myself is to get the heatsink warm with a heatgun or hair dryer before screwing in the heatbreak, then it should grip better when it cools. I imagine it doesn't actually need to get very hot, since the heatsink should never be hot in use.

    parenthetical - Reply

    If you have a heated bed, just lay the almost-tightened heatsink and heatbreak on the bed at around 50°C until it’s very warm to the touch, then finger tighten and allow to cool.

    bruceb -

    • Gather:

      • 9mm Bearing

      • Titan Aero Lid

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    • Insert the 9mm diameter bearing into the the back of the Aero heatsink, this is designed to be a tight fit but you should be able to push it in by hand.

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    • Gather:

      • Filament Guide (1.75mm or 3.00mm)

      • PTFE Tubing (for 1.75mm filament only)

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    • For 1.75mm Filament:

      • Cut a 23mm length of PTFE and insert it fully into the top of the heatbreak.

      • To reduce the possibility of jams, ensure that both ends of the PTFE are cut squarely and the ends are not deformed, we recommend using a sharp knife rather than scissors for this.

      • Slide the 1.75mm filament guide over the protruding PTFE. The flat side of the guide should be flat with the back of the lid.

      • Ensure that the guide sits flush against the Aero sink. It is preferable to get the tubing too short, rather than too long

    • For 3.00mm Filament:

      • Simply slide on the filament guide, and hold it in place when pushing the lid on the Titan body. The flat side of the guide should be flat with the back of the lid.

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    • Gather:

      • M3x30 screws

      • M3x25 Screw (the shortest M3 screw)

      • Shake-proof Washer

      • Assembled Body

      • Assembled Lid

      • The mid-sized 2.5mm Hex Wrench

    The 2.5mm hex wrench I received is too large for my screws’ sockets. I’ve verified the size of the wrench to be 2.49mm across each pair of facets. The screws I received are around 2.125mm across their socket’s facets. You can tighten them with the 2mm wrench, but you must be careful not to round the wrench or screws.

    bruceb - Reply

    • Press the heatsink onto your extruder. It's a bit of a tough fit, but it will all fit in.

    • It will not be flush like the plastic Titan lid would be, as the heatsink is flat on the backside. It is intended that there will be small gaps between the extruder body and the heatsink where the old lid would have fit in.

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    • Screw two of the longer 30mm M3 screws you're using on the right two holes on the lid.

    • Because the extruder is only attached to the motor by one screw at the moment, you may need to wiggle it a little to get them to thread into the motor.

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    • Screw your short screw into the lower right hand corner of the lid.

    • This screw goes into the brass insert on the back of the extruder body, not your motor.

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    • Slip the shake-proof washer onto the screw with the blue patch lock on it.

    • WARNING - this screw goes through the bearings and so when it is tightened it creates an axial load on the bearings, if this screws is overtightened even once it may cause permanent damage to your bearings which will result in bearing failure -PROCEED WITH CAUTION.

    • Screw in this screw until it is finger tight and no more.

    • The shake-proof washer will prevent this screw from coming loose.

    • There may be some slight visual misalignment of the idler and teeth, this is due to an inconsequential machining error of the filament drive gear. The toothed portion of the shaft is wide enough to accommodate this minor misalignment with no effect on how the teeth engage the filament.

    • If you find that the screw is not biting it may be due to the teeth on the slip proof washer protruding slightly which increases the thickness, try to flatten out the teeth before trying again.

    Even after I try to flatten the washer, the screw won't allow the threads to catch, they only catch without

    Stephen Harbin - Reply

    Make sure the spacer you are using is 2 mm thick, if yours is thicker than this you will have issues. If your spacer is 2mm thick then double check that there are no print artefacts that are increasing this thickness, if possible use a file to tidy up the mounting surface.

    Dan Rock -

    • Try to rotate the large acetal gear to see if it moves smoothly.

    • If it is hard to rotate, check the position of the steel pinion gear, it may be too far forward. Adjust it so that it is flush with the front face of the acetal gear and try again.

    • If this does not solve the issue, then the screw with the shake-proof washer on it may have been overtightened. If loosening this screw allows the acetal gear to run smoothly then the screw has been overtightened and permanent damage may have been caused to the bearings; seek replacement bearings if this is the case.

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    • If the large gear exhibits “backlash” (there's play between the large plastic gear and the metal one on the drive shaft), loosen all screws on the lid and rotate the body such that the gears fully mesh.

    • Re-tighten the screws as described in the previous steps.

    when adjusting the body rotation for backlash be aware that you are also moving the hole in the centre of the heatsink relative to the motor shaft, which could cause it to rub, causing excessive friction. I actually lightly reamed the heatsink hole with a drill bit and lubricated it with pencil graphite. Not sure if that was really necessary, best just to make sure the motor shaft doesn't touch the heatsink at this point.

    parenthetical - Reply

    • Gather:

      • Aero Asembly

      • 4x 2.9x13mm Self-Tapping Screws

      • 40mm Fan

    That should read 40mm fan, not 30mm

    Alex - Reply

    Thanks for that! I’ve updated the guide.

    Gabe S. -

    • Place the fan on top of the heatsink fins and use the 2.9x13mm self tapping screws to secure it in place.

    • Do not over-tighten the screws as this can crack the fan.

    • Make sure that there is adequate airflow over the heatsink. If your printer setup blocks the fan, you'll have printing problems.

    I would strongly recommend using M3 machine bolts instead of self tappers. IMO proper bolts and a threaded heatsink to accept them should be standard. The fan blocks the bearing bolt, so you can’t disassemble it with the fan on, so every single time you need to do anything to your aero (other than adjust the idler tension) you will have to remove the fan.

    parenthetical - Reply

    • If you're printing 1.75mm filament, you can guide it a little better by putting a length of PTFE tubing in the top of the idler lever

    • Press the tubing into the lever.

    • It may be a very tight fit. You can file down the tube if it helps.

    Why am I doing this step AFTER the lever is installed? Why not BEFORE??

    Brian Janiszewski - Reply

    • To prevent damage to the fragile thermistor wires it is important to provide strain relief to provide protection against printer movements tugging at the wire.

    • Failure to do this step will significantly reduce the lifespan of the thermistor cartridge .

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    • Hot-tightening is the last mechanical step before your Aero is ready to go! Hot-tightening is essential to sealing the nozzle and heatbreak together to ensure that molten plastic cannot leak out of the hotend in use.

    • Using your printer's control software (or LCD screen), set the hotend temperature to 285°C. Allow the hotend to reach 285°C and wait one minute to allow all components to equalise in temperature.

    • Gently tighten the nozzle whilst holding the heater block still with a spanner and using a smaller 7mm spanner to tighten the nozzle. This will tighten the nozzle against the Heatsink and ensure that your hotend does not leak.

    • You want to aim for 3Nm of torque on the hot nozzle—this is about as much pressure as you can apply with one finger on a small spanner.

    The picture is misleading, you can’t do this step in the way shown if you already followed step 23 and put the throat in the block. Its also not made clear that the throat/block assembly winds up loose because the weight of the wires keeps torqueing the assembly as you manipulate it so until the carriage is completely assembled and you know where the wires will run its fiddly to prevent the parts from unscrewing then you need to tighten up according to the earlier steps when its more difficult to see how much space you are leaving.

    Greg Martin - Reply

    • You're all set with assembly! All you have left is configuring your firmware to deal with your new extruder. Follow one of the links below to update your firmware:

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    • In your slicer of preference find the retraction settings. In Slic3r this is in printer settings.

    • Start with a retraction length of 1mm

    • If you experience blobs or stringing on the surface of the print increase the retraction length to 2mm.

    • Do not increase the retraction length more than 2mm as this can lead to molten plastic being pulled into the heat break, increasing the likelihood of jams.

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    • Place the Silicone sock on the heater block.

    • Whenever you install a new hotend, it's important to run a PID tune. This will allow your printer to adjust some internal parameters so that it can learn how your hotend heats up. This way, your printer can anticipate how much power it needs to give your hotend to get it up to temperature, but not over.

    • Use a computer to connect to your printer. If you have a typical RepRap printer, you can use PrintRun, Repetier Host, Simplify3D, or MatterControl.

    • Other, closed-source, printers may be better suited to their manufacturer's recommended printer control software.

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Finish Line

6 other people completed this guide.

Gabe S.

Member since: 08/08/2017

13,048 Reputation

42 Guides authored


A couple of things I can’t find:

Step 4 mentions we will be hot-tightening the nozzle later but I can’t find where this is described.

I can’t see any mention of haw to install the idler assembly, Step 27 shows it installed but there’s no previous step for doing it.

Keith Cassidy - Reply

2 remarks:

1. In this guide the step is missing that explains the placement of the idler (can be found in the titan guide).

2. When using the Prusa I3 adapter from the prusa upgrade kit, step 31: the “2mm mount” screw is too short, and the “7mm mount” is too long.

Sam Jocque - Reply

already mentioned - the idler assembly is missing

anyhow I have M4x10 and M3x12 extra ?! I assume (after looking at titan manual) that M4x10 can be used instead of the thumbscrew so that’s ok but this M3x12 ?! I have no clue where that one is from :(

arhi - Reply

As everyone has mentioned, the idler installation step is indeed missing (didn’t initially realize as I left the idler in the box). Either way, just went to the e3d wiki and check titan idler for a quick picture; here’s the page for reference, https://wiki.e3d-online.com/Titan_Assemb....

Alex - Reply

Is there a guide to show the electrical connections? Especially for the cooling fan. I am building a printer using an Arduino Mega and a Ramps 1.4 board with a dual extruder set up. I know where the heaters and thermisters will connect, but need to know where the fans will connect.

Mark McKay - Reply

I wish you had mentioned how to fine tune the way the heater block assembly is aligned when installed. I undid my nozzle a partial turn so I could move the hot end a bit, so the wires face out to the left and not in the way of my part cooling duct

Paul - Reply

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