ANET A8 | Belt Pulley Insert (Customizable)

by TNS, published

ANET A8 | Belt Pulley Insert (Customizable) by TNS Feb 26, 2017


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42232Views 9193Downloads Found in 3D Printer Accessories


Based on poor_red_neck's idea / thing and the parametric pulley lib of droftarts, I created a customizable belt pulley insert with belt retainers. I added some code to the pulley lib of droftarts in order to adapt it to the ANET A8's bearing.

Major credit goes to those two creators!

The reason for creating this thing was that the other versions did not provide retainers or the retainers were too tight and blocking the belt.

By using the customizer, a version without retainers or without support can be generated!

Why should I add a pulley insert to the bearing?
The tooths of the stock ANET A8 version are running on the plain surface of the bearing. This can cause vibrations to the motion of the y- and x-axis!

Spotlight on some CUSTOMIZER-configurations:

  • Default (Pulley T Ht = 6.5, Retainer Ht = 1.5, Notch Depth = 1)[AVAILABLE IN DOWNLOADS SECTION]:

    • Wider than stock standalone bearing (about 1.5mm)
    • Left some tolerance for belt (6mm wide)
    • Retainers should be more sturdy, since 0.5mm support before notch starts
  • Slim (Pulley T Ht = 6, Retainer Ht = 1.1, Notch Depth = 1):

    • Just minimally wider than stock standalone bearing (about 0.2mm)
    • No tolerance for belt (6mm wide) -> May stress the retainers
    • Retainers fragile, since only 0.1mm support before notch starts
  • Your awesome config here
    • You think you found an awesome configuration, just let me know in the comments and I may reference you here in the description

Print Settings










Print slow for high precision (e.g. 30-40mm/s)

Post print:

  • Remove the support on one side of the pulley (e.g. with a knive)
  • Do not tighten the screw holding the bearing too much (keep it loose in order to allow a frictionless rotation)!

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Thanks, ill try this but want to get a alu one. What type of idler is this? GT2 16T?

I got Anet A8 and i cannot print this with any settings, it prints the rims ok but the rest wont come out.
The nozzle is .4, PLA, speed 15mm/s on all expect movement.
Wall thickness is the lowest i can get(.4 and .8 on top/bottom thickness.)
195C 20% fan and upped the flow at 110 % cause i though this was the problem, lastly infill 100% to make it full
As a novice 3d printer user i am sure that i have something that is missing, any guidence?

hola que rodamiento utiliza ?

For those having problems downloading a customised model in Customizer:
When in Customizer mouse over to the top right of the preview window and click "View Source".
In the window that pops up select all text, right click and hit "Copy".
Open a new Notepad file on your Windows PC and paste the copied text.
Save as "YourFileNameHere.scad" <- This creates an .scad file.
Go to: http://www.openscad.org/
Download SCAD for FREE and install.
Open SCAD, click "File" and "Open".
Browse to your newly created .scad file and open it.
In the right hand window you'll see the code that generates your object.
Anytime you edit anything in the code, be sure you mouse to the top of that window and click "Preview" or hit F5 on your keyboard.
If the object creator is nice, every parameter of your customizable model will have a clear comment as to what changing that parameter will do.
When your done customizing the model click "Export to STL" at the top of the window.

Enjoy your customized model.

Thanks for this. I'm a newbie, and these instructions saved the day.

Thank you for the work around, been getting errors lately in Customizer.

what % i need to print in cura ; normal size is to big

which x-axis belt tensioner did you use in the picture?

this never prints the base correctly the rest is perfect but the base i cant get right

may be a dumb question but how do I get the existing pulley metal thing to fit?

Comments deleted.

printed with a resolution of 0.1, at 30mm/s and 100% infill...
broken during a 12h print and caused layer-shift on the y-axis :-(

Hi There, what size flanged bearing does this fit?

Newbie here! You're greatly appreciated bro. Anyone that creates and share with others to help them save money, gets thumbs up and a new friend. Keep up the good work bro.

which front brace and y-axis tensioner did you use?

I used this front brace: http://www.thingiverse.com/thing:1430727

The y-axis tensioner I use is this one: http://www.thingiverse.com/thing:2084294

Frame brace for Anet A8
by Simhopp
Anet A8 Y Belt Tensioner

Which sizes did you use for the x-axis? I have the same belt-tightener but a pulley-ring with slightly smaller outer diameter doesnt fit... :(

Actually I had to sand / file my belt-tightener in order to fit this combo. I'm considering to publish a modified belt tightener, which fits the pulley insert by default...

Comments deleted.