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 5 years ago ```rad = 31; ``` ```dx = rad/2; ``` ```hole_sz=6.5; ``` ```shaft_sz=15; ``` ``` ``` ```full_h = 4; ``` ``` ``` ```module screw_hole(x,y) { ``` ``` translate([x,y,0]){ ``` ``` linear_extrude(height = full_h+5, center = true, convexity = 10, twist = 0, slices = 20, scale = 1.0) { ``` ``` circle(d=hole_sz, \$fn=50); ``` ``` } ``` ``` } ``` ```} ``` ``` ``` ``` ``` ```module ring(inner, outer, height) { ``` ``` difference() { ``` ``` cylinder(h=height, r=outer, center=true, \$fn=50); ``` ``` cylinder(h=height+1, r=inner, center=true, \$fn=50); ``` ``` } ``` ```} ``` ``` ``` ```union() { ``` ``` difference() { ``` ``` hull() { ``` ```// cube([42.3,42.3,full_h], center=true); ``` ``` translate([17,17,0]) cylinder(r=6,h=full_h,center=true); ``` ``` translate([-17,17,0]) cylinder(r=6,h=full_h,center=true); ``` ``` translate([-17,-17,0]) cylinder(r=6,h=full_h,center=true); ``` ``` translate([17,-17,0]) cylinder(r=6,h=full_h,center=true); ``` ``` } ``` ``` translate([0,0,-1]){ ``` ``` screw_hole(dx,dx); ``` ``` screw_hole(dx, -dx); ``` ``` screw_hole(-dx,dx); ``` ``` screw_hole(-dx,-dx); ``` ``` ``` ``` linear_extrude(height = full_h+4, center = true, convexity = 10, twist = 0, slices = 20, scale = 1.0) { ``` ``` circle(d=shaft_sz, \$fn=50); ``` ``` }; ``` ``` } ``` ``` } ``` ``` ``` ``` translate([0,0,full_h/2]) { ``` ``` ring(15/2,20/2,2); ``` ``` } ``` ```} ``` ``` ```