Pulley (customizable, with lots of tooth profiles)

thingiverse

# Pulley (customizable, with lots of tooth profiles) This is OpenSCAD script for modelling different timing belt pulleys, that could be printed on regular FDM printer. ## Available options * Profile * Number of teeth (10-100) * Teeth profile: * MXL * 40DP * XL * H * T2.5 * T5 * T10 * AT5 * HTD (3 mm, 5 mm, 8 mm) * GT2 (2 mm, 3 mm, 5 mm) * Motor shaft diameter * Toothed part length (3-30 mm) * Height of "base" (0-30 mm)* * Diameter of "base" (10-50 mm)** * Top and Bottom flanges * Enable or disable top flange * Top flange height (above tooth) * Top flange width (thickness of flange) * Enable or disable bottom flange * Bottom flange height (above tooth) * Bottom flange width (thickness of flange) * Set bottom flange bottom surface diameter equal to the base diameter * Holding _(configures holding screws and nuts placeholders)_ * Screws disposition * None _(disables placeholders) * 1 screw * 2 screws at 90 deg * 3 screws at 120 deg * 4 screws at 90 deg * Nut shape * Hexagonal * Square * Screw profile * M1 * M1.6 * M2 * M2.5 * M3 * M4 * M5 * M6 * Nut shaft distance _(distance in mm between inner face of nut and shaft)_ * Idler Bearings _(This section allows to configure grooves to insert bearings)_ * Add bearing grooves _(enables or disables bearing grooves)_ To actually enable this * Bearing grooves diameter _(should be close to bearing outer diameter)_ * Bearing grooves height _(should be close to bearing width)_ * Tweaks * Additional tooth width _(Scaling tooth for good fit)_ * Additional tooth depth _(If you need more tooth depth than this provides, adjust the constant above. However, this will cause the shape of the tooth to change)_ * Surfaces_quality _(Polygon multiplier for smoother surfaces, not influence tooth profile)_ * Standard * High * Highest * Best * Flip pulley upside down _(if pulley diameter bigger than bese, you can flip it upside down right here for easier 3D-printing)_ _\* to produce holes for holding bolts and nuts, **base height** + **bottom flange width** should correspond to nuts used, for example greater than 7 mm for M3 nuts_ _\*\* to produce holes for holding bolts and nuts, **base diameter** should correspond to nuts used_ ## Authors and contributors This project is my attempt to organise a little this usefull thing and share for further improvements. I've found it on thingiverse published by D14 @ October 30, 2016. Initially it was made by droftarts @ January 2012. I have improved some things (made code more readable, added some options, improved flanges shape). Later I have found many remixes, with some usefull options. I will try to add their functions too. I think this will be better to improve one tool with lots of functionality, than have many separate "a little improved". [Here is github source, you are welcome to improve.](https://github.com/Kekht/pulley_customizable) ## Converting from SCAD to STEP If you need STEP file, instead of using STL, you can actually import SCAD to FreeCAD, and save STEP there. [Here is guide](https://forum.lulzbot.com/t/tip-converting-openscad-files-easily-to-step-with-freecad/228) But please note, that first you will need manually edit SCAD to reflect all "customizable" options in code.