Better Grip Hobby Knife

thingiverse

Thick grip hobby knife designed for use with a M3 x D5 x L4 mm brass hot melt inset nut and an M3 set screw for blade retention. I got tired of my X-Acto knife handle coming loose every time I twisted it, and the blade falling out, so I designed this in Fusion 360 just for the heck of it. I made the handle thicker, and added knurling to make it easier to get a good grip on it. I've printed them in both PETG, and ABS with great success. Settings will depend on what material you're using. I used 240 nozzle temperature, with 105 bed temperature for the particular ABS I was using, and 80 for the PETG. This seems to work well, at least on my printer. Make sure to use a 100% cooling fan setting for PETG. Again, at least with the PETG I was using. I've tried to include enough photos to make the brass heat insert pretty self explanatory. It's best to first insert the blade so that you don't push the insert in too far, making it impossible to insert a blade. The tolerance for the blade slot is pretty tight. It's a good idea to insert the blade sharp end in at first with a small pair of pliers (be careful, hobby blades are very sharp! Do this at your own risk!) to clean the slot up. This will make it easier to get the blade in the right way. Enjoy!