diff --git a/include/short.scad b/include/short.scad index 717a4549104e6a5c4b5138cfc28283337b2fcb2b..b7854e6f08bc76ce2ee1a8c161e7fa4afc6bc0df 100644 --- a/include/short.scad +++ b/include/short.scad @@ -38,3 +38,12 @@ module tube(l, th) { children(); } } + +// produce a flat ring +// parameters: outer diameter, thickness +module ring(od, th) { + difference() { + circle(d = od); + circle(d = od - th*2); + } +}