E3D V6 PTFE tube jig for Prusa/etc

thingiverse

These are jigs specifically designed for cutting PTFE tubing used in E3D hot ends on Prusa MK3 and MK3s (and similar extruders). It utilizes a pencil sharpener blade from Mobius + Ruppert, available either as part of their sharpeners or sold separately. However, make sure to use the regular wedge or round sharpener blades, not the oversized grenade-sized blade. The MK3 version features two distinct stops - one marked at 50mm for cutting the tube to that precise length and another marked at 13mm for trimming the Prusa 13mm filament section above the extruder. In contrast, the MK3s version has a single marked stop set at 44.2mm for cutting purposes. It boasts an additional feature - a shorter tube slot running across the middle to securely hold the tube in place while cutting the internal bevel. This requires a specialized 60-degree angled drill bit or burr. The MK3 version boasts a 45-degree angled end, designed specifically to cut the 45-degree chamfer required for meshing with the E3D heat break. On the other hand, the MK3s version has a more pronounced 60-degree chamfer. To achieve optimal results, it's highly recommended that you first trim the chamfer, followed by trimming the other end of the tube at the marked stop (44.2mm or 50mm), and finally cutting the internal bevel. The bolt required for securing the sharpener is an M2.5 x 5 or M2.5x6 bolt, paired with M2.5 square nuts. For acquiring square nuts, consider using these: https://www.amazon.com/gp/product/B07FKQZ8Y7 When it comes to choosing bolts, any M2.5x5 or x6 will suffice. However, getting the nut into the back end of the slot can be a bit tricky. One effective approach is using a small screwdriver to gently push it back in and ensure perfect alignment with the bolt hole. Update 2019-05-09: This jig has been completely revamped from scratch. While maintaining its core design, significant improvements have been made to the chamfer bevels and cutting blade positioning. Additionally, a square nut bolt has been added for enhanced stability, and tolerances have been fine-tuned for easier use.