Customizable Profile Screw Thread

thingiverse

OpenSCAD module to generate screw threads with any profile. The .STL is an example male/female pair with a trapezium profile. Arguments are: profile: A list of points describing the profile of the thread, like you would pass to polygon() pitch diameter height The module respects $fa as the minimum angle of a fragment, so optionally pass this to control resolution. The profile is a list of [x,y] points describing a polygon. x values of 0 will lie on the surface of a cylinder of the appropriate diameter. x > 0 will be recessed, x < 0 will protrude. Update 2016-02-13 The previous version aligned the profile in the plane perpendicular to the thread, which lead to a slightly distorted profile in vertical cross section (increasing proportional to pitch). The latest version aligns the profile in vertical cross section.