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Bicycle Hub

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MOST Delta filament as guide.JPG This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the discussion tab. The course runs in the Fall semester. It is not open edit.


3D Printed Bicycle Hub[edit]

Project developed by David Porter (talk)
Status
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.

Abstract[edit]

  1. The use of 3D printing in developing countries to replace broken or warn parts is greatly beneficial. The low cost printing can be difference between having a mode of transportation or walking. By printing bicycle parts the need to buy new parts will be eliminated. I have printed a bicycle hub using PLA as a prototype for a simple road bike hub. This model uses loose ball bearings which are not as ideal as sealed cartridge bearings when used with PLA. For future designs a sealed cartridge bearing should be used. The hub profile was modeled in FreeCad, rotated around the axle, then sliced with slicer and printed on a MOST-Delta Printer.
  2. Picture of Prototype shown laced to wheel.
    Hub.jpg

Bill of Materials[edit]

  1. Hub Axle- $1.25
  2. Hub Nut x2 $0.10
  3. Bearing Set x2 $.25
  4. PLA $1.50
    1. Front_hub_osat_my5777.scad
    2. Upload and link to all STLs

Tools needed for fabrication of the OSAT[edit]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Drill bit for reaming spoke holes
  3. Open ended wrench
  4. Grease

Thingiverse link OBJ/stl/FreeCAD files

Skills and Knowledge Necessary to Make the OSAT[edit]

  1. 3D printing
  2. Bicycle Maintence
  3. Bicycle Wheel Building

Technical Specifications and Assembly Instructions[edit]

How To:

  1. Print hub halves (approx. 1 hr per half at 70% infill)
  2. Load greased ball bearings into bearing assembly
  3. Secure Bearing Top
  4. Thread Axle
  5. Secure Lock nuts
  6. Lace Wheel with correct spokes
  • Assembly about 30 mins plus wheel construction time
  • Total time around 2 hours


Common Problems and Solutions[edit]

  1. Be sure to use grease on bearings and axle shaft to minimize early wear
  2. Use grease to hold bearings in bearing cup

Cost savings[edit]

  1. Estimate: $4.50 (with new parts) $1.50 with used parts
  2. Commercial Equivalent $10.00
  3. Savings of $5.50 or 55%

References[edit]

  1. Wheel Building: "Why Build Wheels?" Wheelbuilding. Sheldon Brown, n.d. Web. 04 Dec. 2014.