Razor Tube Cutter

thingiverse

In my business, I have to precision-cut lengths of heat-shrink tubing with clean, straight ends. I researched various tubing cutter designs on Thingiverse and found that the good ones all require hardware like springs and bolts. I wanted a design that can use single-edge razor blades used in razor scrapers without any additional hardware. WARNING: Razor blades are hazardous and should be handled carefully to avoid injury. They must be kept out of reach of children. Use this design at your own risk. To print this model, it's crucial to slice the settings so that printer travel moves don't cross over the slot where the razor blade is placed. The narrow slot makes it difficult to clean stringing and might prevent the razor from entering. The red Push PLA used in the photos tends to print thick and then shrink while cooling, forcing me to make the blade slot wide enough to avoid closure during printing. If your print results in a slot that's too wide for the blade to wobble, use narrow strips of tape on the blade to fill the extra space. Apply just enough tape so that the blade slides into the slot but won't come out when tilted. Layer Height: 0.2mm Perimeters: Minimum 3 Speed: 25mm/s Travel speed: 130mm/s Infill: 100% Concentric No Support Extrusion Width: 0.6mm (my Orion nozzle is 0.5mm) Fan and retraction settings depend on the material used. The Backstop friction-fits onto the cutter at any distance needed. I included the BackstopBase file so users can add their own cylindrical tube holder for various sizes of tubing required. Note that there's limited headroom when the cutter is fully closed (about 9mm), so if larger tubing needs to be cut, try the "more space" version of the cutter.