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Math Teachers' Pencil/Straw Holder/ Stand, Hyperboloid, Ruled Surface

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3D model description

Math Teachers' Pencil/Straw Holder /Stand, Hyperboloid, Ruled Surface
This is a classic display for a ruled surface (hyperboloid) using classroom pencils or straws (see David Hilbert's famous book on imagination and geometry). It comes in four versions: two hole diameters (8.5mm and 9.5mm), single or dual rings). The outer diameter is 127mm or 129mm, respectively. It holds up to 48 pencils or straws. Once some pencils are inserted, try to lift the ring up slowly and allow the pencils to drop a bit for a symmetric structure.

Have fun and do not get mad when things fail to work as expected.

3D printing settings






.15 to .2mm



  • 3D file format: STL
  • Publication date: 2018/04/17 at 08:55


Designs 217
Downloads 9.6k
Followers 83

STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.

When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides:




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