Wall-mounted paper towel holder

This model lets you hook up your paper towel rolls (up to 30 cm / 1 foot tall and maximum 12.5~13 cm in diameter) against a wall or cabinet.  It's easy to put together.

Requirements

• Superglue.
• Double-sided tape or Command strips.
• A level (or an unfathomably accurate architectural eye).

Printing pro tips

• Nothing requires support, if you orient parts correctly in your slicer.
• The mortise and tenon used to put the tube together have 0.1 mm of slack.  They should fit together quite right if your printer is dimensionally accurate.

Assembly and mounting instructions

The pictures should give you a good idea of how it all works.

1. Identify the wall or cabinet your paper towel roll will be mounted to.  You should have at least 35 cm width of surface available.
2. Print the models.
   1. A PrusaSlicer 3MF file is included for your convenience, with all the parts (Left side, Right side, Tube left and Tube right).
   2. If your printer bed is large enough, you can turn off the Tube left and Tube right parts, and turn on the Tube part.  This will save you assembly time.
3. Assemble the tube.
   1. If you printed the tube whole (because your printer can handle it), you can skip this part.
   2. Glue the parts of the tube superglue or other glue suited for your choice of filament, using the tenon and mortise as alignment guides.
   3. Wait for the glue to dry.
4. Clean the mounting surface.  Use soap + water then isopropyl alcohol, or anything that ensures the wall is degreased.
5. Apply double-sided tape to the backs of the Left side and Right side parts you printed.
6. Stick the Left side part to your mounting surface, using a level to ensure it is 100% vertical.
   1. Ensure there are at least 33 cm of room to the right of the part.
   2. Ensure that the Left side is perpendicular to the wall.
7. Insert the right end of the tube into the hole of the Right side.
   1. The tube has a hexagonal lip almost at the end on each side, intended to sit flush against the inside of each side.
8. Holding both parts together, insert the left end of the tube into the hole of the already-mounted Left side.
   1. Be careful not to stick the Left side to the wall just yet.  You will adjust the height of the Right side in a moment.
9. Using a level on the tube, ensure that the tube is horizontal.
   1. As you do this, verify that both Right side and Left side are perpendicular to the wall.
   2. Also verify that both lips on the tube sit flush against the inner face of both sides.
10. Push the Right side against the wall so it sticks.
11. Firmly press the base of both Left side and Right side against the wall, to ensure the double-sided tape sticks strongly to the surface.

Usage instructions

To install a new paper roll:

• Slide the tube out (up and towards yourself) from the Left side and the Right side.
• Insert the tube into the cardboard center of your paper roll.
• Holding the tube by both sides horizontally, slide the tube back into place, making sure the hexagonal sides fit the hexagonal-keyed holes on the Left side and the Right side.

To dispense sheets from the roll:

• Pull down to the number of sheets you want.
• Pull the topmost sheet hard sideways.  The sheets you wanted should tear right off.

Modifications

The FreeCAD original is supplied with this project.  To make use of the file, before you open it, you will have to install the Macro joint macro in FreeCAD.  This macro should be available from the Macros menu in your FreeCAD setup.

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As always, your remixes and makes are more than welcome.  Post them!