Bike Chain Guard
Project developed by User:Alyssa Knoester
Abstract
- The OSAT piece is a universal chain guard for a bicycle.
- It improves the safety of a bike for people who may not have access to a new bike or chain guard and is attached simply by string or a zip tie.
- There hasn't been case studies regarding chain guards however there have been stories and research into the significance of bikes in developing countries. Bikes help alleviate poverty in developing countries.
Bill of Materials
1. PLA Filament
*OpenSCAD and STL Files can be found at this [link]
2. 2 Liter Bottle (free from recycling)
- Attachment Method:
1.String 2.Zip Tie
- Adhesive:
1.Super Glue 2.Hot Glue
Tools needed for fabrication of the OSAT
- MOST Delta RepRap or similar RepRap 3-D printer
- Potentially a Hot Glue Gun
Skills and Knowledge Necessary to Make the OSAT
- None
Print Instructions
For all printed components
Material: PLA
Layer Height: 0.2mm
Shell Thickness: 0.8mm
Fill Density: 15%
Print Speed: 70 mm/s
Printing Temperature: 210 C
No supports necessary.
Total Printing Time: 1 hr 45 mins
Assembly time: >5 min
Assembly Instructions
- Cut a section of " by " from the 2 Liter bottle
- Glue the bottle in the seam of the 3d printed part see image below
- Use string or zip tie to attach to bike
Common Problems and Solutions
- There were no problems with building or printing, more testing would be necessary for improvements.
Cost savings
- PLA Material: $0.38
- Means of Attachment:
1. String: $0.003 (third of a cent for a 6 in piece) 2. Zip tie: $0.01
- Adhesive:
1. Hot glue: $0.005 (half a cent or less of glue) 2. Super glue: $0.03
Total: $0.39-$0.42
Commercial: $24.28 [24 in Guard]
Savings:
$23.86-$23.89 98%
</nowiki>