|Keywords||, , ,|
|Cost||USD $ 2.76|
|Hardware||CC BY-SA 4.0|
|This Open Source Appropriate Technology has been prototyped.|
This Hand Pump Drill is a mechanical drill that utilizes human effort to perform the functions of a drill. In locations where power tools are too expensive or there is little access to electricity, a hand drill is an effective solution. 3D printing these means they can be very cost efficient - less than $0.25 in filament, a spring, and drill bits.
- Final Draft image coming soon!
Bill of Materials[edit | edit source]
- Materials Needed:
- Drill Bit(s) of varying sizes - any standard drill bits should fit this drill.
- (OPTIONAL) Spring to have spring-loaded capabilities: Purchase here
- STLs and Open-Source (Blender) Source Files Download
Tools needed[edit | edit source]
- Jellybox or similar RepRap 3-D printer
Technical Specifications and Assembly Instructions[edit | edit source]
- This print should take about 4 hours (I printed three different prints - one with 3 pieces, one with 2, and one with 1). These could all be printed in one go, reducing print time drastically.
- Assembly should take no more than 5 to 10 minutes.
- Print all part at .1 mm resolution (lower resolution may still work, but have not been tested)
- All parts should be printed vertically. The end-handle should be printed with the hole on the narrow end facing up.
- Insert spring-slide over the drill body. After a few rotations, it should revolve smoothly.
- Place the chuck-jaws into the drill body with the jaw-cover screwing into the body over the chuck-jaws
- If a spring is being used, place the spring Spring sized for this print over the drill body before securing the jaw-cover
- Attach the end handle to the spring-slide
Common Problems and Solutions[edit | edit source]
- Apply lubricant to the drill body (should not be necessary)
- Ensuring the end-handle is printed with the hole facing up ensures accurate sizing and print quality for a snap-fit.
Cost savings[edit | edit source]
- If your solution is not a low cost one then it is not really appropriate.
- Costs for this hand-drill
- 3D printed drill = $.25
- Drill bit = $1.31 each Source Link
- OPTIONAL Spring = $1.40 each Source Link
- TOTAL: $ 2.76
- Commercial Equivalent
- $72.50 Spring Loaded Push Drill Source Link
- $15 for shipping per their calculated shipping policy
- TOTAL: $87.50
- $ savings and % savings
- A total savings of $84.74, or more than 3000% in savings.
[[Category:Tools]] [[Category:Hand Tools]] [[Category:Drills]].