Idler Pulley Wheel Expand

Delrin Idler Wheel Assembly



A Delrin (Acetel) precision machined smooth idler pulley kit for CNC applications and linear motion. Use with timing belt up to 9mm wide 

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Finally, linear motion equipment has become affordable and accessible to us all. With the open source movement in full force, companies like OpenBuilds and Makerslide have developed products which make it extremely easy and affordable to build almost any linear motion system. From 3D printers, CNC milling machines to camera sliders, the OpenBuilds and Makerslide range has you covered.

These precision CNC machined Delrin idler kits are used in linear motion systems which make use of V-Slot and Makerslide aluminium extrusion profiles and form part of a gantry which your extruder, printer bed, CNC spindle or camera can fix to. They are compatible with 625 2RS or 625ZZ roller bearings and require a 5mm precision shim washer to fit and transfer load between the two bearings internally.

Many 3D printers such as the TEVO’s and Creality CR-10, and CNC machines like the Shapeoko and X-Carve make use of these idler kits in their linear motion systems.

This assembly is a convenient kit containing everything needed to attach to timing belt and pulley system. You will get the following components:

- Delrin Idler pulley
- 2x 625 2RS Bearings
- M5 Bolt
- M5 Nyloc Nut
- 2x Washers

Technical Specifications


Delrin (Acetal)


Timing belt up to 9mm wide


625ZZ / 625 2RS

Compressive Strength

63 MPa

Rockwell Hardness


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