diff --git a/openscad/own/supermicro_cs836_fan-holder/fanholder_back.png b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.png
new file mode 100644
index 0000000..dc36a02
Binary files /dev/null and b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.png differ
diff --git a/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad
new file mode 100644
index 0000000..23f8698
--- /dev/null
+++ b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad
@@ -0,0 +1,31 @@
+// VARS
+fan_dia=80;
+fan_depth=25;
+fan_oversize=10;
+mt=2;
+width=fan_dia;
+length=fan_dia;
+hole_dia=4.25;
+hole_offset=4.5;
+depth=34-fan_depth;
+cage_mt=1.5;
+$fn=100;
+
+//##################
+
+// MODEL
+
+module bracket_bottom(){
+    difference(){
+        cube([width,length,mt]);
+        translate([fan_dia/2,fan_dia/2,-0.1])cylinder(r=(fan_dia+fan_oversize)/2,h=depth+0.2);
+        translate([-0.1,length/2+0.1,-0.1])cube([width+0.2,(length+0.1)/2,depth+0.2]);
+        translate([length/2,hole_offset,-0.1]){
+            translate([-length/2+hole_offset,0,0])cylinder(r1=hole_dia/2,r2=hole_dia/2+0.5,h=mt+0.2);
+            translate([length/2-hole_offset,0,0])cylinder(r1=hole_dia/2,r2=hole_dia/2+0.5,h=mt+0.2);
+        }
+    }
+    translate([-cage_mt,-mt,0])cube([length+cage_mt*2,mt,depth]);
+}
+
+bracket_bottom();
diff --git a/openscad/own/supermicro_cs836_fan-holder/fanholder_back.stl b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.stl
new file mode 100644
index 0000000..a2137a6
Binary files /dev/null and b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.stl differ