diff --git a/printed/printed_pulleys.scad b/printed/printed_pulleys.scad
new file mode 100644
index 0000000..9f8112d
--- /dev/null
+++ b/printed/printed_pulleys.scad
@@ -0,0 +1,177 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see .
+//
+//
+// Printed pulleys are a remix of droftarts's (see ) Parametric Pulleys
+// on Thingiverse (see ) and are licensed under the
+// Creative Commons - Attribution - Share Alike license (see )
+//
+//
+
+include
+include
+
+printed_pulley_GT2_profile = [[0.747183,-0.5],[0.747183,0],[0.647876,0.037218],[0.598311,0.130528],[0.578556,0.238423],[0.547158,0.343077],[0.504649,0.443762],[0.451556,0.53975],[0.358229,0.636924],[0.2484,0.707276],[0.127259,0.750044],[0,0.76447],[-0.127259,0.750044],[-0.2484,0.707276],[-0.358229,0.636924],[-0.451556,0.53975],[-0.504797,0.443762],[-0.547291,0.343077],[-0.578605,0.238423],[-0.598311,0.130528],[-0.648009,0.037218],[-0.747183,0],[-0.747183,-0.5]];
+
+function printed_pulley_od(tooth_count, tooth_pitch, pitch_line_offset)
+ = tooth_count * tooth_pitch / PI - 2 * pitch_line_offset;
+
+module printed_pulley_teeth_from_profile(tooth_count, tooth_depth, tooth_width, tooth_profile) {
+ pulley_od = printed_pulley_od(tooth_count, 2, 0.254);
+
+ difference() {
+ rotate (90 / tooth_count)
+ circle(r = pulley_od / 2, $fn = tooth_count * 4);
+ tooth_distance_from_centre = sqrt(pulley_od * pulley_od - (tooth_width + 0.2) * (tooth_width + 0.2)) / 2;
+ for(i = [1 : tooth_count])
+ rotate(i * 360 / tooth_count)
+ translate([0, -tooth_distance_from_centre])
+ scale([(tooth_width + 0.2) / tooth_width, 1])
+ polygon(tooth_profile);
+ }
+}
+
+module printed_pulley_GT2_teeth(type) {
+ tooth_count = pulley_teeth(type);
+ if (tooth_count == 0)
+ circle(r = pulley_od(type) / 2);
+ else
+ printed_pulley_teeth_from_profile(tooth_count, 0.764, 1.494, printed_pulley_GT2_profile);
+}
+
+
+module printed_pulley_teeth(type) { //! Draw the pulley's teeth
+ tooth_count = pulley_teeth(type);
+ tw = pulley_od(type) * PI / (tooth_count * 2);
+ ir = pulley_ir(type);
+ or = pulley_od(type) / 2;
+
+ T_angle = 40;
+ GT_r = 0.555;
+ for (i = [0 : 1 : tooth_count - 1])
+ rotate(i * 360 / tooth_count)
+ if (pulley_type(type)[0] == "G")
+ translate([0, ir + GT_r])
+ hull() {
+ circle(GT_r);
+ translate([0, GT_r])
+ square(2 * GT_r, center = true);
+ }
+ else
+ translate([0, (ir + or) / 2])
+ hull() {
+ for(side = [-1, 1])
+ translate([side * tw / 2, 0])
+ rotate(-side * T_angle / 2)
+ square([eps, (or - ir)], center = true);
+
+ translate([0, 1])
+ square([tw, eps], center = true);
+ }
+}
+
+module printed_pulley(type) { //! Draw a printable pulley
+ ft = pulley_flange_thickness(type);
+ hl = pulley_hub_length(type);
+ w = pulley_width(type);
+ r1 = pulley_bore(type) / 2;
+ or = pulley_od(type) / 2;
+ screw_z = pulley_screw_z(type);
+
+ module core() {
+ translate_z(pulley_hub_length(type) + ft)
+ linear_extrude(w + 1) let($fa = 1, $fs = 0.1)
+ if ("GT2" == str(pulley_type(type)[0], pulley_type(type)[1], pulley_type(type)[2]))
+ difference() {
+ printed_pulley_GT2_teeth(type);
+ circle(r = pulley_bore(type) / 2);
+ }
+ else
+ difference() {
+ circle(or);
+ printed_pulley_teeth(type);
+ circle(r = pulley_bore(type) / 2);
+ }
+ }
+
+ module screw_holes() {
+ if (pulley_screws(type))
+ translate_z(screw_z)
+ for(i = [0 : pulley_screws(type) - 1])
+ rotate([-90, 180, i * -90])
+ teardrop(r = screw_pilot_hole(pulley_screw(type)), h = pulley_flange_dia(type)/2 + 1, center=false);
+ }
+
+ // hub
+ if (hl)
+ translate_z(pulley_hub_dia(type) >= pulley_flange_dia(type) ? 0 : hl + w + 2 * ft)
+ render_if(screw_z && screw_z < hl)
+ difference() {
+ linear_extrude(hl)
+ difference() {
+ circle(r = pulley_hub_dia(type) / 2);
+ circle(r = pulley_bore(type) / 2);
+ }
+ if (screw_z < hl)
+ screw_holes();
+ }
+ // bottom flange
+ translate_z(hl)
+ linear_extrude(ft)
+ difference() {
+ circle(d = pulley_flange_dia(type));
+ circle(r = pulley_bore(type) / 2);
+ }
+
+ // top flange
+ translate_z(hl + ft + w) {
+ // inner part, supported by core
+ linear_extrude(ft)
+ difference() {
+ circle(r = or);
+ circle(r = pulley_bore(type) / 2);
+ }
+ // outer part at 45 degrees for printing
+ rotate_extrude()
+ translate([or -eps , ft])
+ vflip()
+ right_triangle(ft, ft);
+ }
+
+ difference() { // T5 pulleys have screws through the teeth
+ render_if(screw_z && screw_z > hl)
+ core();
+ if (pulley_screw_z(type) > hl)
+ translate_z(pulley_hub_dia(type) >= pulley_flange_dia(type) ? 0 : hl)
+ screw_holes();
+ }
+}
+
+module printed_pulley_assembly(type, colour) { //! Draw a printed pulley with its grub screws in place
+ translate_z(pulley_offset(type)) {
+ color(colour)
+ printed_pulley(type);
+
+ if (pulley_screws(type))
+ translate_z(pulley_screw_z(type))
+ for(i = [0 : pulley_screws(type) - 1])
+ rotate([-90, 0, i * -90])
+ translate_z(pulley_bore(type) / 2 + pulley_screw_length(type))
+ screw(pulley_screw(type), pulley_screw_length(type));
+ }
+}
diff --git a/tests/printed_pulleys.scad b/tests/printed_pulleys.scad
new file mode 100644
index 0000000..9b51a6b
--- /dev/null
+++ b/tests/printed_pulleys.scad
@@ -0,0 +1,37 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see .
+//
+
+include <../core.scad>
+include <../vitamins/pulleys.scad>
+include <../printed/printed_pulleys.scad>
+use <../utils/layout.scad>
+
+
+module PrintedPulley_test() {
+ layout([for (p = pulleys) pulley_flange_dia(p)]) {
+ rotate(-135)
+ printed_pulley_assembly(pulleys[$i]);
+ translate([0, 20, 0])
+ rotate(45)
+ pulley_assembly(pulleys[$i]);
+ }
+}
+
+if ($preview)
+ PrintedPulley_test();