Thingiverse
E3D V6 PTFE tube jig for Prusa/etc by eneref
by Thingiverse
Last crawled date: 4 years, 6 months ago
These are jigs for cutting the PTFE tubing for an E3D hot end on the Prusa MK3 and MK3s (and similar extruders) .
It uses a pencil sharpener blade from Mobius + Ruppert. Available on their sharpeners or as spare blades. NOT the grenade-sized blade -- their regular wedge or round sharpener blades.
The MK3 version has a 50mm stop (marked) for cutting the tube to 50mm in length. It also has a 13mm stop (marked) for cutting the Prusa 13mm filament section above the extruder.
The MK3s version has a single 44.2mm stop marked for cutting.
It has a shorter tube slot going across the middle to hold the tube easier for cutting the internal bevel (which requires a 60 degree angled drill bit or burr).
The MK3 version has a 45 degree angled end going into the sharpener to cut the 45 degree chamfer on the end to mesh with the E3D heat break. The MK3s version has a 60 degree chamfer.
Recommend you trim the chamfer first, THEN trim the other end of the tube at the marked stop (44.2mm or 50mm). THEN trim the internal bevel.
The bolt required for the sharpened is an M2.5 x 5 or M2.5x6 bolt, and you need M2.5 square nuts.
For square nuts, I use these:https://www.amazon.com/gp/product/B07FKQZ8Y7
For M2.5 bolts, I just got an assortment, but any M2.5x5 or x6 will work.
It can be a little tricky getting the nut into the back end of the slot (I use a small screwdriver to push it back in) and lined up perfectly with the bolt hole.
Update 2019-05-09: I've completely redone this jig from the ground up. Similar design to the old one, but have redone the bevels for the chamfers as well as the positioning for the cutting blade, have added a square nut bolt for better stability, and have made things a little easier on the tolerances.
It uses a pencil sharpener blade from Mobius + Ruppert. Available on their sharpeners or as spare blades. NOT the grenade-sized blade -- their regular wedge or round sharpener blades.
The MK3 version has a 50mm stop (marked) for cutting the tube to 50mm in length. It also has a 13mm stop (marked) for cutting the Prusa 13mm filament section above the extruder.
The MK3s version has a single 44.2mm stop marked for cutting.
It has a shorter tube slot going across the middle to hold the tube easier for cutting the internal bevel (which requires a 60 degree angled drill bit or burr).
The MK3 version has a 45 degree angled end going into the sharpener to cut the 45 degree chamfer on the end to mesh with the E3D heat break. The MK3s version has a 60 degree chamfer.
Recommend you trim the chamfer first, THEN trim the other end of the tube at the marked stop (44.2mm or 50mm). THEN trim the internal bevel.
The bolt required for the sharpened is an M2.5 x 5 or M2.5x6 bolt, and you need M2.5 square nuts.
For square nuts, I use these:https://www.amazon.com/gp/product/B07FKQZ8Y7
For M2.5 bolts, I just got an assortment, but any M2.5x5 or x6 will work.
It can be a little tricky getting the nut into the back end of the slot (I use a small screwdriver to push it back in) and lined up perfectly with the bolt hole.
Update 2019-05-09: I've completely redone this jig from the ground up. Similar design to the old one, but have redone the bevels for the chamfers as well as the positioning for the cutting blade, have added a square nut bolt for better stability, and have made things a little easier on the tolerances.