PTFE tube 60° inner bevel jig for 4mm OD 2mm ID tubes

thingiverse

This is a 2-part tool for cutting a 60-degree angle on the inside of a PTFE tube. It's designed to work with a box cutter/utility knife that has snap-off blades. The shorter screw is used for the tube guide, while the longer screw is for the blade guide. When inserting the small piece into the tube guide, make sure it faces the outside with its beveled edge. To use this tool: 1) Insert the blade into the blade guide and refer to the pictures for correct orientation of the sharp edge. Then, tighten the screw. 2) Insert the PTFE tube into the tube guide so that the end sticks out slightly. Use a flat object or surface to push it back until it sits flush with the guide. If needed, the tube guide can be used to make a straight cut on the PTFE tube. Just be sure to tighten the screw enough to prevent the tube from spinning, but not so much that it gets deformed. 3) Insert the tube guide into the blade guide until it reaches the tip of the blade. 4) Gradually shave material off the PTFE tube by gently pushing the parts together while rotating them. Be careful not to push too quickly, as this can cause the blade to carve too deeply and get stuck.