Tunable torque wrench

Tunable torque wrenchThere are many good printable fixed torque wrench design for nozzle changing but most of them depend on the characteristics of the filament used to print the parts. This version is my attempt to solve that problem.FeaturesAdjustable torqueCome with calibration toolLess depend on filament characteristicsRequire parts20mm d8mm spring.(I use the yellow spring that often use for printer bed)OD4mm ID2mm PTFE tube1/4" Hex Socket Adapter (something like this https://www.amazon.com/DEWALT-DW2541-4-Inch-Socket-Adapter/dp/B0000225P4)Hex socket matched your nozzle size Print settingMaterial : PETG. PLA is too brite as my testing and they are tent to deform under pressure.Print setting : 5 walls, 5 top/bottom layers, 30% infill Assembly guideCut the PTFE tube into 6 segments with length of 5mm, this will be use as bearing for the top gear.Make sure the gears smooth. Sand the gear lightly if needed. Put some grease between the gears.The spacer only needed if your spring is too