Hand Pump Drill (Spring-Loaded)

From Appropedia
About this device
HandDrill1.PNG
Keywords 3D printing, drill, hand tool, spring loaded drill
Uses development, industry
Authors Luke Shaw
Status Open design
Made? Yes
Replicated? No
Published 2017
Designed in Illinois
Affiliations Principia
ENGR242
Materials drill bit
plastic
spring
Cost USD $ 2.76
SDGs SDG08 Decent work and economic growth
License data
Hardware CC BY-SA 4.0
Instructions data
Manufacturing files https://www.thingiverse.com/thing:2291395
Translation data

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.

Bill of Materials[edit | edit source]

  1. Materials Needed:
    1. Drill Bit(s) of varying sizes - any standard drill bits should fit this drill.
    2. (OPTIONAL) Spring to have spring-loaded capabilities: Purchase here
    3. STLs and Open-Source (Blender) Source Files Download

Tools needed[edit | edit source]

  1. 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.
  1. Print all part at .1 mm resolution (lower resolution may still work, but have not been tested)
  2. All parts should be printed vertically. The end-handle should be printed with the hole on the narrow end facing up.
  3. Insert spring-slide over the drill body. After a few rotations, it should revolve smoothly.
  4. Place the chuck-jaws into the drill body with the jaw-cover screwing into the body over the chuck-jaws
    1. If a spring is being used, place the spring Spring sized for this print over the drill body before securing the jaw-cover
  5. 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.
  1. 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
  1. Commercial Equivalent
  • $72.50 Spring Loaded Push Drill Source Link
  • $15 for shipping per their calculated shipping policy
  • TOTAL: $87.50
  1. $ savings and % savings
  • A total savings of $84.74, or more than 3000% in savings.

[[Category:Tools]] [[Category:Hand Tools]] [[Category:Drills]].