Ovals-be-gone! Y-belt tightener for Printrbot by SVAPS. For T5 and T2.5 belts.

by SVAPS, published

Ovals-be-gone! Y-belt tightener for Printrbot by SVAPS. For T5 and T2.5 belts. by SVAPS Feb 15, 2013
1 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps


Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag


Thing Statistics

4462Views 1070Downloads Found in 3D Printer Parts


I wanted a tensioner that would attach to the bed using the supplied two screws and that was easy to mount and which would enable tightening of the belt without tools and without risk of damaging the belt, as with some of the tensioners where the belt is tensioned with a screw directly on the belt or where the belt has to turn a sharp corner.
Also I wanted the thing not to be too large or require too much ABS.

Added an STL for a T2.5 belt - I have not tested this, so please report any misbehavior.


Print the three parts.
Remove the mounting screws from the bed with the previous mount.
Place the base (green part) on the under-side of the bed with the rectangular tab facing away from you.
Thread the screws through the holes in the bed from above as before and through the holes in the base.
Grab the nobbly side of the belt with the nobbly side of the grabber (orange part) and slot the belt and grabber into the groove in the lid (Blue Part) with the smooth side of the belt against the long side of the groove.
Press the lid against the base and tighten the screws into the lid (Nuts should not even be necessary).
Insert and tighten an M4x40 or 50 mm into the grabber and keep tightening until your belt is taut.

  • And you will have no more round holes come out as strange ovals :-)

More from 3D Printer Parts

view more

All Apps

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

3D Print a wide range of designs with Treatstock. Easy to use tools to get the perfect result. The global 3D printing network that connects you with high-quality and fast working print services nea...

App Info Launch App

The one labeled for 2.5mm seems to be for 2mm, and my printrbot LC
can't print with enough details to do the grabber right anyways :(

Hi, excellent part, will it work with the T2.5 belt?

Just posted a grabber for T2.5 belt. Please let me know if it works!

Hi, that was fast, I'm going to print it and try :) THANKS :)

Hi Rechena,

Thanks :-)
This version is for T5. To make one for T2.5 belts the "grabber" would need to be modified with teeth fitting the T2.5 belt.

I will try and make one.

I've tried to slice it on the Slic3r and it "trys" to fix an error on the part and just makes a block it skips the "dented" part... Any clues?

Now the part has been repaired netfabb and Slic3r can get the dented part.

Yes. I neglected to check the part for errors in netfabb. Will do it later today i hope. By the way netfab is highly recommended since it can fix most defects in stl files even with the free version.
I use sketchup to make things and it almost always makes faulty stl files.

Hi there, sorry about the non reply after you posted the part, I've tested it now and it works perfect, I've been away from printing for some time.

Now I'm having a different problem the Y_tightener_Base breaks constantly from the pressure of the screwn :/ I'm already on my third print to replace, is there a way to reeinforce it?

Thanks again.

Yep, I have the same problem with sketchup... thanks for this :)

I LOVE you!! Works beautifully!

Nice!! <- two thumbs up