View source for Bike Chain Tensioner

{{Device
|manifest-date-updated=2020-06-04
|manifest-author-name=Kathy Nativi
|manifest-author-affiliation=Appropedia
|title=Bike Chain Tensioner
|description=This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles.
|intended-use=transportation, hobbyism
|keywords=3D printing, bicycle, bike chain tensioner
|contact-affiliation=MOST
|contact-appropedia-user=User:Spoonless
|image=ChainTensioner.jpg
|development-stage=Prototype
|made=Yes
|made-independently=No
|manifest-language=eng
|documentation-language=English
|countries-of-design=United States
|main-materials=Plastic
|estimated-cost-amount=23.50
|sustainable-development-goal=Sustainable Development Goal 8
|manifest-autho-email=info@appropedia.org
}}
{{777}}
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<!--end infobox-->
==Bike Chain Tensioner==
 Project developed by [[User:Spoonless]]
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{{status-prototype}}
You can help Appropedia by contributing to the next step in this [[OSAT]]'s [[:Category:Status|status]].
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==Abstract==
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.

[[File:ChainTensioner.jpg|200px]]

== Bill of Materials==
# [https://github.com/SpoonlessCorey/OSAT_BikeChainTensioner Tensioner.scad]
# (2) ZipTies
# (1) 8-32 Thread, 1-1/4" Length Machine Screw (eg. [http://www.mcmaster.com/#91792a201/=uvhjkl McMasterCarr:91792A201])
# (1) 8-32 Thread Locknut (eg. [http://www.mcmaster.com/#91831a009/=uvhlvw McMasterCarr:91831a009])

== Tools needed for fabrication of the OSAT==
# [[Delta_Build_Overview:MOST| MOST Delta RepRap]] or similar RepRap 3-D printer
# Screwdriver
# Adjustable Wrench or Pliers

== Skills and Knowledge Necessary to Make the OSAT ==
* Ability to use a 3d printer.
* Ability to use a wrench and screwdriver.

== Technical Specifications and Assembly Instructions==
All parts are symetric such that component orientation is not an issue.

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

=== Common Problems and Solutions===
* 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==
* 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: [http://www.amazon.com/Bionicon-7640162290111-c-guide-eco/dp/B00HZRCZBS Bionicon C.GUIDE] approx. $30
** 30 - (5.60 + 0.90) = $23.50


[[Category:How tos]]
[[Category:Electricity]]
[[Category:Electric lighting]]
[[category:OSAT 3D-Printable Designs]]