18 Tooth GT2 Pulley

by OoiTY, published

18 Tooth GT2 Pulley by OoiTY Jan 18, 2012
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18 Tooth GT2 Pulley by OoiTY is licensed under the Creative Commons - Attribution license.

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Here's a printable pulley for GT2 belts with a 2mm pitch.

Updated using drofart's excellent parametric pulley design here; http://www.thingiverse.com/thing:16627/

Probably useful for anyone who doesn't want to customise the pulleys in openscad.

I'd recommend the 18 tooth pulley over the 17 tooth pulley, since I find it's harder for the belt to engage the smaller pulley perfectly. Might just be me though, let me know if you have any success with it.

Fewer teeth (More resolution) and smaller hub with two nut traps.


Personally I print my pulleys at 100% fill. I'd reccommend using SFACT with stretch on to offset the width of your extruded plastic in order to get the printed tooth profile more accurately. I'd recommend a lower height over width radio than normal in order to get a nice consistent perimeter edge.

Printed with a Prusa Mendel with T5 belts and printed pulleys, so it is possible to print an upgrade to the GT2 pulley. Your printer needs to be very well calibrated in order to print circles which are as true as possible; oval pulleys cause all sorts of problems with backlash.

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Need me this gt2 2mm pulley 8 -12 tooth? Max min tooth posible on 5mm shaft

This pulley fits a GT2 belt perfectly. I'm using this pulley to replace the 12 tooth HTD3 pulleys that came with the TwoUp printer. The QUBD people did not send the HTD3 belts with the kit and still have not after many complaints about it. I am using this pulley to convert over to GT2, which I have available. The mm per revolution (or steps per mm) are the same when using a 12 tooth HTD3 or 18 tooth GT2 pulley so no firmware or setting changes are necessary.

Thanks for posting this!

what size screw do you use?

I use a M3 grub screw.

Thanks, but can you say what lenght is the screw 

two grub screw would be better...

Hi, nice work and printing. What did you model it in?

I'm currently doing an update to my openscad pulley here http://www.thingiverse.com/thing:11256http://www.thingiverse.com/thi... to include many metric T and AT sizes, imperial, GT2 and HTD. Hopefully get it finished over the weekend!

T5 & XL Parametric Pulley

I was hoping that you would add a GT2 profile to that thing. :)

I modeled it in Rhino, which can export to a multitude of filetypes, but not openscad, unfortunately. You could get the .stp models for pulleys from SDP-SI's webstore. That's where I got the pulley's tooth profile from.