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|keywords=3D printing, bicycle, bike chain tensioner | |keywords=3D printing, bicycle, bike chain tensioner | ||
|intended-use=transportation, hobbyism | |intended-use=transportation, hobbyism | ||
| | |status=Prototype | ||
|made=Yes | |made=Yes | ||
| | |replicated=No | ||
|countries-of-design=United States | |countries-of-design=United States | ||
| | |affiliation=Category:MTU, Category:MOST | ||
| | |materials=Plastic | ||
|estimated-cost-amount=6.50 | |estimated-cost-amount=6.50 | ||
|estimated-cost-currency=USD | |estimated-cost-currency=USD | ||
| | |sdg=SDG08 Decent work and economic growth | ||
|contact-affiliation=MOST | |contact-affiliation=MOST | ||
|authors=User:Spoonless | |authors=User:Spoonless |
Revision as of 00:07, 23 October 2020
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