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=== Common Problems and Solutions=== | === 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. | * 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== | == Cost savings== | ||
Revision as of 13:10, 4 December 2014
Bike Chain Tensioner
Project developed by User:Spoonless
Template:Statusboxtop Template:Status-prototype You can help Appropedia by contributing to the next step in this OSAT's status. Template:Boxbottom
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
- (2) ZipTies
- (1) 8-32 Thread, 1-1/4" Length Machine Screw (eg. McMasterCarr:91792A201)
- (1) 8-32 Thread Locknut (eg. McMasterCarr:91831a009)
- Upload and link to all STLs
Tools needed for fabrication of the OSAT
- MOST Delta RepRap or similar RepRap 3-D printer
- Screwdriver
- Adjustable Wrench or Pliers
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 by 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.
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