I'm new to 3D printing and I recently got my first 3D printer, an Ender 3 Pro by Creality.

I've tried to find information about the type of nozzles should I look for. I'm trying to find stainless steel nozzles but there are so many models (M7, M8, etc.) and I have no idea what nozzle type I should get.

I've tried searching on Google but the only info I could find is that the extruder is an MK-10.

I am also looking for a heating cartridge for the hot end, but I still cannot find no information about the size that I need (15 mm/20 mm/30 mm). Also looked for info about the heated bed so I know what kind of thermistor I need (I found two types and no clue which one to get).

Where can I find some technical information about these?

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    Welcome to 3DPrinting.SE! I not sure but this might get closed as a shopping question, although, you're looking for the parts list, not exactly where to buy them (or so it seems). Search for MK10 nozzle on Amazon. You should readily find them there. Size on those should be M6x13x6mm. Micro-Swiss HW-NOZ-MK10-04 is one example. I believe you can find most of what you need on Amazon, if for nothing else, finding the parts to buy elsewhere if you don't like Jeff Bezos. – Pᴀᴜʟsᴛᴇʀ2 Nov 6 at 0:52
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    You may not have Amazon available for delivery, but you can use them for parts detection! :o) – Pᴀᴜʟsᴛᴇʀ2 Nov 6 at 1:04
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    @Pᴀᴜʟsᴛᴇʀ2 IMHO this is not a shopping question, it is a question asking which parts his machine consists off. Considering the different parts that exist and Chinglish texts describing the parts, I can image that there is confusion. See also this recent meta topic. – 0scar Nov 6 at 7:40
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    I think this could be a valid question if it was re-written to be clearer what information the OP is asking for, and less of a dialogue. – Sean Houlihane Nov 6 at 11:24
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    Thanks to everyone, indeed I need the M6 nozzle and 20mm heat cartridge as @Greenonline and 0scar suggested! – iamroot Nov 7 at 12:22
up vote 4 down vote accepted

The Ender 3 takes an M6 thread (metric 6 mm diameter). Measurement of stock nozzle shown.

Most sellers will list compatible printers Ender 2, Ender 3, Ender 4, CR-10, CR-10S, CR-10 Mini, CR-10-S4, CR-10-S5, CR-8, CR-7. Will Also Fit Any Other MK10 Heater Blocks.

I recently bought some titanium alloy nozzles as the brass one got closed over after crashing into the glass bed.

Measurement of nozzle in digital calipers

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    OTOH, brass nozzles are dirt-cheap, so buy a dozen and swap in as needed. – Carl Witthoft Nov 6 at 16:02
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    You get what you pay for. Given my Ender 3 keeps nose diving the bed every now and then, I’d rather have a nozzle that costs 5 times as much and doesn’t need changing :) (I will be getting an ABL). – Gone Coding Nov 6 at 17:22
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    Heh ... was just considering a nose dive with a titanium nozzle on a glass bed ... crunch. I think I'd rather get the problem fixed as replacing glass beds I'm sure gets expensive after a bit. – Pᴀᴜʟsᴛᴇʀ2 Nov 6 at 20:09
  • @Paulster2: Funny you should say that. I switched back to my original Ender 3 bed after switching nozzles, only to gouge a long grove in the bed (after manually levelling)... Ender 3 really needs an ABL. – Gone Coding Nov 8 at 9:56

There is no such thing as a single MK10 hotend design. The Chinese aftermarket has mingled the designations.

If it has a MK10 like Makerbot hotend, then the nozzles you are looking for are M7 threads. It appears (see this answer) that your hotend is a cloned MK10 and has different dimensions, you have the M6 version.

You could measure your current heat cartridge (the width of the Aluminium block); if you look at the MK10 drawings of a proper M7 MK10 hotend (below) you see that the width of the block is about 19 mm.

MK10 Aluminium heater block dimensions

  • Width=Diameter in cylinders. Cylinders have diameter and length, it is a 6.3 x 19.3mm heater cartridge, – Trish Nov 6 at 14:50
  • Where did you get the diagram? The ender 3 is a MK10 hotbed but it is an M6 thread. Not M7. – Gone Coding Nov 6 at 15:00
  • @GoneCoding A true MK10 (invented by Makerbot) has these dimensions, if not it is a different MK10. – 0scar Nov 6 at 15:16
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    Thank you very much! You are also correct, I need the M6 nozzles and the 20mm cartridge! – iamroot Nov 7 at 12:20
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    @iamroot There is a lot of confusion, as there are more MK10 designs around. See e.g. the difference between an MK8 and an MK10 nozzle. – 0scar Nov 7 at 13:22

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