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==Abstract==
==Abstract==
This chain tensioner can be used to address issues with chain hopping, chain slap, rattles. I can be printed and assembled for less than $6, and offers equivalent perfomance to comercial products sold for $30.
This chain tensioner can be used to address issues with chain hopping, chain slap, 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]]
[[File:ChainTensioner.jpg|200px]]

Revision as of 12:44, 4 December 2014

Bike Chain Tensioner

Project developed by User:Spoonless

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Abstract

This chain tensioner can be used to address issues with chain hopping, chain slap, 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

  1. (2) ZipTies
  2. (1) 8-32 Thread, 1-1/4" Length Machine Screw (eg. McMasterCarr:91792A201)
  3. (1) 8-32 Thread Locknut (eg. McMasterCarr:91831a009)
    1. Upload and link to all STLs

Tools needed for fabrication of the OSAT

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

Technical Specifications and Assembly Instructions

  1. Ziptie the cage to the Bicycle frame just above chain.
  2. Hold the chain up so it is captured by 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

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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