This OSAT project is a carpenter's hammer. In order to be heavy enough and duable enough to drive nails, a bolt is used for the hammering surface. The resulting product is a very strong hammer that can drive and remove nails. This hammer is an appropriate OSAT because a hammer is one of the most basic and necessary tools to build a structure. A hammer like this would be easy to print, low cost, and fill a real need for a developing area.
Link to Thingiverse page where customization can be done to the tool: http://www.thingiverse.com/thing:1182261
Bill of Materials
CAD Files
- Follow Thingiverse link above for the FreeCAD file
- File:Hammer.scad
STL
Extra Parts
- 3/4" x 3.5" bolt
Tools needed
- MOST Delta RepRap or similar RepRap 3-D printer
- 1/18" wrench for bolt installation.
Skills and knowledge needed
- There is no special skills needed to make this tool.
Technical Specifications and Assembly Instructions
- If any changes to the design want to be done, open the SCAD file and adjust the parameters.
- Slicing instructions
- Fill % = 100 (Less infill could probably be used)
- Speed = 50 mm/sec
- Layer Height =.15 mm
- No support Needed
- I recommend using a brim on the print
- Print the hammer standing up, hammer head end down
- Print time with above settings will be about 15 Hours
- Tread bolt into hammer with a wrench after printing.
Common Problems and Solutions
Bolt can be difficult to thread into the hammer, I used a vise to hold the hammer stationary.
Cost savings
- Filament needed: 235 grams @ $18.39/kg = $4.32
- Hardware needed: 1 bolt @ $0.91
- At a total cost of $5.23
Commercial Equivalents
Saving amount
- The savings are anywhere from $4.74 to $194.74
- The percentage saved ranges from 47.5% to 97.4%
Gallery
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Hammer 1
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Hammer 2
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Hammer 3
References