Primo Style Belt Tensioners for the Lowrider2

I have been looking (drooling) at the new belt tensioners on the Primo and thinking they look like the correct size for the lowrider, and I hate the zip ties. What say you @vicious1? Any chance there will be official ones, or should I keep Tinkercading my Frankenstein?



Just print the corner top pieces of the MPCNC and bolt them to the corners of your table with the belt holder closer to the table.

Well, yup definitely needs to get ported over, but I think it would be better to do a total rework as well. I have a few more primo sizes to finish first.


A…“FEW”… more?

He’s a maniac !


Frankenstein Tinkercad hack attached. Test prints went well once I cleaned up the overhangs.

EDITED - Added mirrored parts, cleaned up the finish and fixed overhangs on the part. Print as provided. Each piece needs a M5 Locknut and M5 x 30 screw.
Lowrider2 Primo Belt (213.4 KB)


You may need to reup the zip file. The mirror files aren’t in there.
Here’s all 4 of the files, as shown in Cura.

Sorry about that. Here is the updated file.

Lowrider2 Primo Belt (213.4 KB)


Awesome. Thank you!

I installed them tonight and love them. They use the same screw holes as the stock belt ends and it was a super fast swap. So much easier to use then the zip ties.


@cows2computers That’s amazing! Nice work. Direct swap and repeatable tension (counting your turns is my plan). This will be incredibly useful for me because I sometimes need to transition my lowrider to a wider or longer table. This will save me probable 20 minutes every time I do that. Much thanks. And also much thanks to @vicious1 for the brilliant design. Much improved, as usual.

Edit: Mine are coming fresh of the printer now! I’ve not seen this mentioned anywhere but a quick way to remove/ reinstall these belt stop is to use threaded T-nuts (with the barbed washer) with matching thread pitch bolts. I’ve used this method many many times to uninstall/reinstall and I always have the same mounting spot and I’m not weakening the mounting holes like you would if you just used a wood screw. I pre-drilled then epoxied my t-nuts in place for good measure as well.

There’s my contribution of genius to the community…it’s not much, but hope it helps at least one solitary soul one day.