Telescoping Pencil Holder for 110 or 75 Pencils

This is a print-in-place telescoping holder for colored art pencils.  

• To raise it, grab the handle, twist clockwise, pull up, then twist counterclockwise to lock in place.  In the raised position, you can easily see all the pencils.
• To lower it, twist the handle counterclockwise, lower to a flat surface, then twist clockwise to lock.  Once locked, you can lift and carry the pencil holder in the closed position.

There are two versions:  one has four rings and holds 110 pencils, one has 3 rings and holds 75 pencils.  The holes are 8mm in diameter and 40mm deep, and the clearance from the top of the rings to the handles is 150mm.

Printing:

• A gcode file for the 110ct design is provided to fill the model stats, but you should slice your own. It may take a few minutes, but it should complete.
• No supports are needed in the printing.  The rings print in place as a single part, and the handle prints on its side.
• The parts have wall thicknesses designed for printing with an 0.4mm nozzle.
• The parts can be printed with standard 15% grid infill or 10% gyroid infill.
• There is a chamfer on the bottom of the parts that should keep the elephant's foot from joining the rings together.

Assembly:

• Screw the handle into the center ring.  If the rings stick (this may be due to stringing or small print defects that join the rings), gently twist them to break them free of each other.
• The threads are intentionally a little tight.  If they are too tight, you can lubricate them with crayon or candle wax or sand them lightly.  
• If the handle comes unscrewed too easily, you can put a little CA glue on the threads and screw it together.  This will make the join permanent!

If there are other configurations that are of interest, leave a comment!  I'm exploring whether creating a whole family of different sizes would be worth putting together into a $5 model or setting up as a creator.

I updated my original model to be more space efficient and to use less filament in printing.  The telescoping tracks are improved (C-shaped), and the handle uses 3D printed threads and doesn't require pinning with filament.