Differentiation
The main differences between the e3D-Nozzle family and the "simple" Nozzle are the wrench size, body length and thread length of the nozzle. In fact, I have come across 2 different "Chinese" styles of nozzle, a "big" and a "small" one.
Comparison
For comparison, take a look at this photo, where I aligned the lower ends of the bodies to line up under the wrench needed to handle them.
In words, left to right:
- Chinese Big M6 Nozzle - Aka "Creality Mk8"
- size 8 metric wrench, 4 mm M6x1 thread length, 1 mm clearance, extends a minimum of 8 mm from the heater block
- Chinese Small M6 Nozzle
- size 7 metric wrench, 4 mm M6x1 thread length, 1 mm clearance, extends a minimum of 8 mm from the heater block
- e3D v6 normal (aka NOT volcano etc)
- size 7 metric wrench, 6 mm M6x1 thread length, 2 mm clearance, extends a minimum of 5 mm from the heater block
To differentiate from Makerbot nozzles:
- Makerbot Mk6
- size unspecified wrench, 7 mm M6x1 thread + clearance, extends a minimum of 5.5 mm from the heater block, 12.5 mm overall.
- Makerbot Mk7
- size 1/4 inch imperial wrench (6.36 mm), 5 mm M6x1 thread + clearance, extends a minimum of 8 mm from the heater block.
- Makerbot Mk8
- size 7 mm metric wrench, otherwise as Mk7 - making this almost identical to Creality Mk8 but for no specified clearance between thread and head
- Makerbot Mk10
- size 9 mm metric wrench, 4.5 mm M7x1 thread, 1.5 mm clearing + dia 7.5 mm shelf, extends a minimum of 7 mm from the heater block
Replaceability
Chinese big to Chinese small nozzles in either hotend
Due to the dimensions, one can easily swap the big and small Chinese nozzles for one another. They are virtually interchangeable but differ in the wear patterns.
Chinese nozzles in e3D Hotend
The 3 mm shorter snout and deeper butting with the heatbreak of the e3D nozzle in its designed hotend make it hard to swap a Chinese nozzle into an e3D setup: neither does the thread allow to screw the nozzle in the right length sometimes, it also extends much further. To accommodate, the whole heater block has to be screwed about 3 mm more onto the heatbreak, then the nozzle gets screwed in. The result is equal in overall length.
Makerbot Mk7/Mk8 to Chinese Nozzles
But for the different wrench, those generally will fit, but
###e3D Nozzle in Chinese Hotend
However, the long thread of the e3D Nozzle allows it to be mounted in a hotend designed to hold a Chinese nozzle without trouble - the 3 mm of difference in the body are used for a longer thread and clearance between thread and body, resulting in the same overall length without changing the mounting position of the heater block on the heatbreak.
Internals
Stefan of CNC-Kitchen recently tortured a couple of nozzles for science and investigating wear and tear (video). He found out a couple of differences on the internals:
- The Chinese nozzle had a non-straight pattern on the inside
- The angle in the feeding cone is 60° in an e3D and 90° in the Chinese sample
Conclusion
The Chinese Style nozzles can be interchanged for one another. an e3D style nozzle with standard length (aka not-volcano) can be swapped in for any Chinese Style nozzle. A Chinese Style nozzle needs to have the heater block shifted if mounted into an e3D hotend.
