Non-Drive Side Crank.JPG
Project data
Authors Zhine kang
Completed 2014
Made? Yes
Replicated? Yes
Cost USD $ 2
Export to Open Know How Manifest
Page data
Type Project
Keywords 3D printing, bicycle, bike crank, osat, tool, plastic
SDGs Sustainable Development Goals SDG09 Industry innovation and infrastructure
Authors Zhine kang
Kathy Nativi
Published 2014
License CC BY-SA 3.0
Affiliations Michigan_Tech's_Open_Sustainability_Technology_Lab
MTU
MY4777
Language English (en)
Page views 150


  1. The project is a part of the bike, offered by Dr. John Gershenson.
  2. It is designed based on a real drive-side model since I only find drive-side model from the lab.
  3. I choose to design the non-drive side part since the strength of the gear can not be reached by using plastic material to print.
  4. All size are matched with the original one.

Bill of Materials[edit | edit source]

  1. 3D Printer
  2. Drive Side Crank Model
  3. Plastic filament

link to all source files[edit | edit source]

  1. File:Non-Drive Side Crank.scad
  2. File:Non-Drive Side Crank.stl

Tools needed[edit | edit source]

Skills and knowledge needed[edit | edit source]

  • Basic knowledge for 3D printing

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Print from the base
  2. There is a curve that printed in the air, it's the most difficult part
  3. It can be printed but with low quality, needs to be corrected and polished
  4. Estimated printing time: 37min
  5. Estimated processing time: 15 min

Common Problems and Solutions[edit | edit source]

  1. It is made of plastic so it may not be as strong as metal.
  2. The edge of the crank is not perfectly smooth

Cost savings[edit | edit source]

  1. Estimated costs: less than $2 per crank (including the cost of the filament and electricity)
  2. Commercial equivalent: more than $10
  3. Save at least $8/80% of the cost

References[edit | edit source]

  1. Google picture for bike parts.
  2. Ebay website for pricing