Anet A8 Y belt Tensioner

by MHDesignPrint, published

Anet A8 Y belt Tensioner by MHDesignPrint Feb 20, 2017
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123D Design Corel Draw X8

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This Anet A8 Y belt adjuster allows you to alight the tensioner with the belt, spacer between bearings keep belt teeth from running hard against the bearing flange.

2, 3mm X 30mm .5 Pabhead Screw
1, 3mm X 20mm .5 Panhead Screw
3, 3mm .5 hex nuts

Print Settings


Anet A8






.20mm (Medium Simplified 3D)



How I Designed This

Anet A8 Y tensioner.

Design in Corel Draw X8 and finalized in Autodesk 123 Design.

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I made this, and I like it very much. I have three suggestions though.

  1. Make the two caps that go on the outside of the frame one piece.
  2. Make a single piece for the bottom two legs also, with screws going into the lower legs, and captured nuts for the screws.

I think it will be stronger.
I think the idea of one piece will make it easier to avoid tightening one side more than the other.

Here is the third suggestion.

  1. Put graduation marks on the tops of the legs, so one can tell if one side is tighter than the other.

I hope this is helpful.

Thank you for creating this.

Comments deleted.

Waste of time and filament.

I printed in PLA with Cura and it's too tight. My printer prints usually rather well, so why don't you add some litte tolerance ?

It has plenty of Clearance, must be you and Cura! I know others that use it had no problems, so before you badmouth something better make sure it isn't you. may be your own messed up settings.

How much clearance ?

It seems like the best Y belt tensioner. I printed it, but one piece didn't print good. Could you give the seperate files for each piece ? Thanks a lot !

Their Posted, Happy printing!

I will post them today, I should have when I first posted.

Thank you,

Thanks !
Btw, where do you put the "spacer" ? And what is the difference between the left arm and the right arm ? To me, they seem symetrical, but one file is much larger than the other...

I don't know why it shows one being bigger than the other, must be a Thingiverse thing, They are the same size in my Fusion Files, They are opposites left and right. Spacer does between the bearings to widen them to free up the belt.

I have separated and plan on publishing a remix tonight. One of my pieces didn't print well so I used mesh mixer to separate the shells.

I already published, no need to publish someone else work!