Difference between revisions of "Bike Chain Tensioner"

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|manifest-date-updated=2020-06-04
 
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|title=Bike Chain Tensioner
 
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|image=ChainTensioner.jpg
 
|description=This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles.
 
|description=This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles.
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|intended-use=transportation, hobbyism
 
 
|keywords=3D printing, bicycle, bike chain tensioner
 
|keywords=3D printing, bicycle, bike chain tensioner
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|uses=transportation, hobbyism
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|status=Prototype
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|made=Yes
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|replicated=No
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|countries-of-design=United States
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|affiliations=MTU, MOST
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|materials=Plastic
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|estimated-cost-amount=6.50
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|sdg=SDG08 Decent work and economic growth
 
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|development-stage=Prototype
 
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|estimated-cost-amount=23.50
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==Bike Chain Tensioner==
 
==Bike Chain Tensioner==
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Project developed by [[User:Spoonless]]
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Project developed by [[User:Spoonless]]
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{{Status|prototype}}
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You can help Appropedia by contributing to the next step in this [[OSAT]]'s [[:Category:Status|status]].
 
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==Abstract==
 
==Abstract==
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Latest revision as of 18:08, 13 January 2021

Device
Bike Chain Tensioner
ChainTensioner.jpg
Description This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles.
Keywords 3D printing, bicycle, bike chain tensioner
Uses transportation, hobbyism
Authors Spoonless
Status Prototype
Made? Yes
Replicated? Was this project made independently by someone other than the authors and without their guidance? No
Countries of design United States
Affiliations MTU
MOST
Materials Plastic
Estimated cost USD $ 6.50
Sustainable Development Goals SDG08 Decent work and economic growth
Documentation data
Language English
Manifest data
Language English
Updated 2020-06-04
Author Kathy Nativi
Author affiliation Appropedia
Author email info@appropedia.org
This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printingTap for morePlease leave comments using the talk page. The course runs in the Fall semester. It is not open edit.

Bike Chain Tensioner[edit | edit source]

Project developed by User:Spoonless

This Open Source Appropriate Technology has been prototyped.


Abstract[edit | edit source]

This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles. It can be printed and assembled for less than $6, and offers equivalent perfomance to comercial products sold for $30.

ChainTensioner.jpg

Bill of Materials[edit | edit source]

  1. Tensioner.scad
  2. (2) ZipTies
  3. (1) 8-32 Thread, 1-1/4" Length Machine Screw (eg. McMasterCarr:91792A201)
  4. (1) 8-32 Thread Locknut (eg. McMasterCarr:91831a009)

Tools needed for fabrication of the OSAT[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Screwdriver
  3. Adjustable Wrench or Pliers

Skills and Knowledge Necessary to Make the OSAT[edit | edit source]

  • Ability to use a 3d printer.
  • Ability to use a wrench and screwdriver.

Technical Specifications and Assembly Instructions[edit | edit source]

All parts are symetric such that component orientation is not an issue.

Assembly:

  1. Ziptie the cage to the Bicycle frame just above chain.
  2. Hold the chain up so it is captured in the cage.
  3. Bolt the pully in place
  4. gently crank the pedals by hand and shift throug all gears to ensure nothing is binding

Common Problems and Solutions[edit | edit source]

  • If the fit to they bicycle is loose or overly tight the OpenScad variable "pipeDia" can be set to match your bike frame's tubing diameter.

Cost savings[edit | edit source]

  • Approximatly $23.50 (78.3%)
    • 30g of PLA at approx. $30/kg = $0.90
    • Machine Screw, Locknut, and bag of zip ties approx $5.60 at local hardware store
    • Equivalent Chain Tesnsioner: Bionicon C.GUIDE approx. $30
    • 30 - (5.60 + 0.90) = $23.50
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