Monoprice Select Mini X-Axis Belt Tensioner cap

thingiverse

This is a longer replacement end cap for x-axis rods on the Monoprice Select Mini. Designed to provide extra space, it features a slot that allows pulley assemblies to slide in smoothly, making belt tensioning possible without spring or other belt-riding tensioners. Tension adjustments are handled by tightening the knob, which pulls the screw and moves the pulley assembly within the cap. This precise control ensures optimal alignment of the pulley. The internal dimensions of this end cap are more constricted than those found on factory caps, preventing pulleys from rotating out of alignment. Note that this replacement end cap is incompatible with sheet metal x-axis covers, but few users will miss their restrictive design. To utilize this product effectively, you'll need to have the following parts on hand: * A 25mm M3 screw (longer screws can be used as well) * An M3 nut, preferably of nyloc variety * A washer that fits between the nut and end cap