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Making the perfect E3D Hotend

Discussion in 'Mods and Upgrades' started by Lance Weston, Dec 13, 2021.

  1. Lance Weston

    Lance Weston Active Member

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    I purchase the inexpensive hotends and throw away the aluminum block retaining the heater, thremistor, and 10mm screw. Chinese E3D's have a .629" diameter and Robos are .625" You can expand the mating hole with a screwdriver, but I cut min down to .626" on a lathe. The heatsink version shown below is tapped a little to deeply for the throat so I cut off the bottom ring and halfway to the next ring to get the throat seating perfect. This will vary by supplier. The standard brass/copper heater blocks are too thick so I cut down the thickness on a milling machine. The ideal block thickness for standard inexpensive hardened steel nozzles is from 9.5mm -> 9.8mm. A brass block does not leak like an aluminium one.

    Insert the 40w heater and tighten the 10 mm screw.

    Using Thermal glue I coat the bead and insert the middle of the block, then tighten the set screw until it just touches the bead.

    Slide heatsink tubing over both pairs of wire. Now fill the hole with glue and cover the wires with glue.

    Put aside for a few days for the thermal glue to dry.

    Finish assembly and crimp on connectors using an "Engineer PA09" crimper

    I have contacted the vendor for the hotends and he now understands the problem with his heatsinks and is going to fix them.

    The nozzles are for an MK8. An MK8 heater block can be used without modification. The MK8 block is 20x20x 10mm thick.




    https://www.amazon.com/dp/B08MVWM43F?psc=1&ref=ppx_yo2_dt_b_product_details

    https://www.amazon.com/dp/B08NPKF2GC?ref=ppx_yo2_dt_b_product_details&th=1

    https://www.ebay.com/itm/333195619246?var=542209246590

    https://www.ebay.com/itm/232795988995?var=532307571167

    https://www.ebay.com/itm/232553410177?var=533177980244
     

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    #1 Lance Weston, Dec 13, 2021
    Last edited: Dec 15, 2021
  2. EmbraceNext

    EmbraceNext Member

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    Are you done with this or is just the start?
     
  3. Lance Weston

    Lance Weston Active Member

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    I am finished. It is the fungible parts that I most care about. MK8 nozzles are the least expensive. I just ordered 50 throats, m6x26 short wade, from aliexpress for $23. I just made an addition 10 hotends so that I can swap out and keep running.

    I did post a compatible shroud which I can not find, but will add to this thread if you are unable to find it.

    brass blocks just cause so much less down time than aluminium.
     
  4. EmbraceNext

    EmbraceNext Member

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    Is this the hotend that you have pictured in your threat on the beefed up R2?
     
  5. Lance Weston

    Lance Weston Active Member

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    yes, and on my R2's.
     

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