Smooth Idler Pulley Kit

(5 reviews) Write a Review
  • OpenBuilds® Smooth Idler Pulley Kit  550
  • OpenBuilds® Smooth Idler Pulley Kit  550
  • OpenBuilds® Smooth Idler Pulley Kit  550


The Smooth Idler Pulley Kit is an easy to assemble free wheel that will complete any linear actuator that based on a timing belt.

Product Features

  • Channel lips for belt containment
  • 9mm wide channel


What is Included


Product Specifications

  • OD: 22mm
  • ID: 16mm
  • Width: 12.7mm
  • Delrin
  • Color: Black

Assembly/Support/Documentation/3D Models

Easy follow along assembly video - top notch awesome community support - open source files and documentation and examples.

Support CAD Files

This design or build includes OpenBuilds, LLC design work(s) shared Open Source under the CC BY-SA 4.0 License Terms and Conditions

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5 Reviews

  • 5
    idler pulley kit

    Posted by Luis Taveras on Feb 17th 2024

    Always Top Notch Products

  • 5
    Great Quality

    Posted by K-Designs on Jan 26th 2021

    My printer is used on a 24/7 basis which means a lot of parts tend to wear down quite fast. one of them being the idler pullies. Got tired of the cheap overseas bearings and the shallow pullies that didn't allow much vertical travel and would bite into the belt. Naturally i was very skeptical on the quality of these bearings but i must say they are amazing! the taller pullies allow the belts to travel freely without binding into the flanges. I'm not sure where the pullies come from but the seem of good quality. So far they been doing great and i'm happy with them

  • 5
    Good Delrin Pulley

    Posted by Unknown on Jul 11th 2020

    Accurately machined pulley and above average (vs. Amazon/eBay) bearings. Used with 688-2RS 8mm ID bearings and spacer to avoid the tiny 5mm fasteners.

  • 5

    Posted by Craig on Jul 2nd 2020

    Exactly what I needed for my project. Works Great

  • 5
    Great Quality for the price

    Posted by Peter Walker on Nov 6th 2019

    I purchased this to rebuild and improve a 3D Printer that I own and was absolutely happy with the price and quality of this item. I was a bit worried that it was going to be too large for my application because the photograph gives no reference to size or scale. Once I received the item, I was very happy with the size and it is perfect for my needs. I wish OpenBuilds would add some type of size reference image with a ruler or something to give perspective on the size of some of their offerings. It would help immensely with choosing the correct item. I would recommend it to anyone.

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