Bike Chain Tensioner: Difference between revisions

Revision as of 00:07, 23 October 2020

Device data
Hardware license	CERN-OHL-S
Certifications	Start OSHWA certification

Bike Chain Tensioner

Project developed by User:Spoonless Template:Status

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.

Bill of Materials

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

Tools needed for fabrication of the OSAT

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: Bionicon C.GUIDE approx. $30
- 30 - (5.60 + 0.90) = $23.50

@@ Line 1: / Line 1: @@
+{{Infobox device
+|title=Bike Chain Tensioner
+|image=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
+|intended-use=transportation, hobbyism
+|status=Prototype
+|made=Yes
+|replicated=No
+|countries-of-design=United States
+|affiliation=Category:MTU, Category:MOST
+|materials=Plastic
+|estimated-cost-amount=6.50
+|estimated-cost-currency=USD
+|sdg=SDG08 Decent work and economic growth
+|contact-affiliation=MOST
+|authors=User:Spoonless
+|documentation-language=English
+|manifest-language=English
+|manifest-date-updated=2020-06-04
+|manifest-author-name=Kathy Nativi
+|manifest-author-affiliation=Appropedia
+|manifest-author-email=info@appropedia.org
+}}
 {{777}}
-==Title of the device or system ==
- Project developed by [your name linked to your user account]
+==Bike Chain Tensioner==
-{{Statusboxtop}}
+Project developed by [[User:Spoonless]]
-{{status-design}}
+{{Status|prototype}}
-{{status-prototype}}
-You can help Appropedia by contributing to the next step in this [[OSAT]]'s [[:Category:Status|status]].
-{{boxbottom}}
 ==Abstract==
-# Paragraph description of the OSAT - why is it Appropriate? What need does it fulfil? Are there case studies you have found of a technology being used successfully?
+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.
-# Picture of completed print using [[image:name-of-your-image.png|500px|right]]
+[[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])
-## Upload and link to all STLs
 == Tools needed for fabrication of the OSAT==
 # [[Delta_Build_Overview:MOST| MOST Delta RepRap]] or similar RepRap 3-D printer
 # Screwdriver
-# Pliers
+# Adjustable Wrench or Pliers
 == Skills and Knowledge Necessary to Make the OSAT ==
-* If you used special skill – link to relevant wikipedia or wikiversity articles/courses
+* Ability to use a 3d printer.
+* Ability to use a wrench and screwdriver.
 == Technical Specifications and Assembly Instructions==
-# Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
+All parts are symetric such that component orientation is not an issue.
-# Include print time estimate
-# Include assembly time estimate
+Assembly:
-# Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)
+# Ziptie the cage to the Bicycle frame just above chain.
-# Consider video if appropriate
+# Hold the chain up so it is captured in the cage.
-{|style="border:1px solid #73BF73; background-color: #E6FFE6; margin-left:.1em; margin-top:2px; -moz-border-radius:15px;" align="right" width="150px"
+# Bolt the pully in place
-!<big>Example video summary of textbook</big>
+# gently crank the pedals by hand and shift throug all gears to ensure nothing is binding
-|-
-|<center>{{#widget:YouTube|id=yiJDx9dCfEQ}} </center>
-|-
-|}
 === Common Problems and Solutions===
-* Include common mistakes/problems to avoid in building your OSAT and how to overcome them
+* 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==
-* If your solution is not a low cost one then it is not really appropriate.
+* Approximatly $23.50 (78.3%)
-# Estimate your costs
+** 30g of PLA at approx. $30/kg = $0.90
-# Find a commercial equivalent
+** Machine Screw, Locknut, and bag of zip ties approx $5.60 at local hardware store
-# Calculate $ savings and % savings
+** 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
-==References==
-* The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <nowiki> <ref> </ref> and <references/>  </nowiki>tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: <ref> web page: Department of Energy (DOE) Landscaping and Energy Efficiency, DOE/GO-10095 (1995) Available: http://www.eren.doe.gov/erec/factsheets/landscape.html</ref>
-<references/>
-<nowiki>
-Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health  care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in
 [[Category:How tos]]
 [[Category:Electricity]]
-[[Category:Electric lighting]].
+[[Category:Electric lighting]]
+[[category:OSAT 3D-Printable Designs]]
-</nowiki>