8mm linear rail blocks

thingiverse

Modified 5/31/2019: Rear rail support was added as the original design had insufficient clearance due to the Y endstop. Now it fits perfectly. Indents were also added so that the same 15mm x 5mm bolts / hammer nuts can be used on all four mounting holes. This is a design created in Fusion 360 to attach 8mm steel rod linear rails to a 4020 extrusion using 5mm bolts and hammer nuts. It was printed in ABS as it will be used underneath the hotbed to take the radial loading off of the Y axis V-Wheels on my Geeetech A10 printer. The design fits around the bolt heads/nuts on the ends of the original A10 rails, and bolts from the bottom to the slots in the underside of the 4020 extrusion. These can be easily used to make standalone 8mm rails for a new printer as well. Rails spacing is approximately 110mm between centers, due to the limitation of the bed levelling wheels. It will still be better than the <40mm edge to edge v-wheel spacing of the original factory rail. They should also work on most CR3, CR3 pro, A10, and A10M (with horizontal, not vertical 4020 rail Y axis) printers. Use two "front" pieces to make a standalone, as the "rear" is modified to fit around the bolt heads/Y endstop mount on a Geeetech A10. Print with 5 perimeters and at least 3 layers top and bottom, with at least 25% infill.