Quote Originally Posted by Lee Roberts View Post
Hi thanks for sharing but what would they be used for? On a cnc machine i mean?
Hello Lee Roberts,

Thank you for your question.

This is a spacer that has an off center (Eccentric) 5mm hole drilled through it. It is used to tension V wheels against MakerSlide material.
You mount this in a 7.14mm (0.281 dia.) hole. When you rotate it, it will move a V wheel mounted to it, allowing you to adjust the tension against the Makerslide rail, V slot or T slot aluminium extrusions.

Hope you find this short answer helpful.
Let me know if I can give you more information.