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CR10 / Ender 3 extruder knob

by Sirpug Sep 19, 2018
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It works great! I printed mine with no changes, exactly how you modeled it and it's a perfect fit on my extruder.

I did have one issue... When printing models to 400mm height limit, my extruder knob bottoms out on the left Z bearing mount. My printer is a CR-10 knock-off, very cheaply made. I thought it was dimension-ally identical to the CR-10, but it's entirely possible the mounts holding the bearings are wider than the Creality machines, or that the shaft for my extruder stepper is slightly longer...

In any case, I seldom print anything 400mm high. I'll try to be mindful and remove the extruder knob before I print anything that tall again.

Great work. It fits and works absolutely perfectly on the extruder of my Anycubic i3 Mega!


Thanks for letting me know it worked so well for you.

I hadn't really thought about the knob hitting the top of the printer before; I don't know if there would be a way around that though, except for taking it off like you said.

thanks, Sirpug

Printed one in black PLA at .2 with 105% extruding and it came out perfect. A bit tight fit and requiered some sanding but now it is perfect.
Great when changing filament and you ned to extrude until the color of the new filament comes out clear.
Posted a make to show how it look on the printer

You're aware that spinning the motor by hand turns the motor in generator producing a current that may damage the board? May I suggest you to add a warning in your description, both as a disclaimer should someone fry their printer with your invention, and for people to at least taking care to spin the motor with care and slowly to minimize the risk.

Yes I am aware that it can damage the board if you turn it to fast. I'll add a disclaimer as soon as possible.

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It's working great for me - thanks!

Thanks for letting me know!

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After 2 weeks of use, the piece turns in a vacuum. I had to strengthen it with a small metal strip in the flat side of the hole

I have not had this issue.

What does turn in a vacuum mean? This also hasn’t been up for 2 weeks.

the flat side in the hole wears out and when I turn the knob, the extruder does not follow the rotation movement