{"id":71129,"key":"Hand_Pump_Drill_(Spring-Loaded)","title":"Hand Pump Drill (Spring-Loaded)","latest":{"id":1263230,"timestamp":"2026-09-02T13:12:07Z"},"content_model":"wikitext","license":{"url":"https://www.appropedia.org/Appropedia:Copyrights","title":"CC-BY-SA-4.0"},"source":"{{242 notice}}\n\n[[File:HandDrill1.PNG|thumb]]\n\n{{Device data\n| manufacturing-files = https://www.thingiverse.com/thing:2291395\n}}\n\n{{Project data\n| authors = User:Limitless285\n| years = 2017\n| made = No\n| replicated = No\n| cost = USD 2.76\n| type = Pump drill\n}}\n\nThis 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.\n\n<gallery>\nImage:HandDrill1.PNG|First Draft\nImage:Handdrill2.PNG|First Draft w/ Spring\nImage:Final Draft image coming soon!\n</gallery>\n</center>\n\n== Bill of Materials ==\n\n# Materials Needed:\n## Drill Bit(s) of varying sizes - any standard drill bits should fit this drill.\n## (OPTIONAL) Spring to have spring-loaded capabilities: [https://www.mcmaster.com/#9657k439/=178iw9i Purchase here]\n## [https://www.thingiverse.com/thing:2291395 STLs and Open-Source (Blender) Source Files Download]\n\n== Tools needed ==\n\n# Jellybox or similar RepRap 3-D printer\n\n== Technical Specifications and Assembly Instructions ==\n\n* 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.\n* Assembly should take no more than 5 to 10 minutes.\n# Print all part at .1 mm resolution (lower resolution may still work, but have not been tested)\n# All parts should be printed vertically. The end-handle should be printed with the hole on the narrow end facing up.\n# Insert spring-slide over the drill body. After a few rotations, it should revolve smoothly.\n# Place the chuck-jaws into the drill body with the jaw-cover screwing into the body over the chuck-jaws\n## If a spring is being used, place the spring [https://www.mcmaster.com/#9657k439/=178iw9i Spring sized for this print] over the drill body before securing the jaw-cover\n# Attach the end handle to the spring-slide\n\n=== Common Problems and Solutions ===\n\n* Apply lubricant to the drill body (should not be necessary)\n* Ensuring the end-handle is printed with the hole facing up ensures accurate sizing and print quality for a snap-fit.\n\n== Cost savings ==\n\n* If your solution is not a low cost one then it is not really appropriate.\n# Costs for this hand-drill\n* 3D printed drill = $.25\n* Drill bit = $1.31 each [https://www.mcmaster.com/#2931a11/=17gho4s Source Link]\n* OPTIONAL Spring = $1.40 each [https://www.mcmaster.com/#9657k439/=178iw9i Source Link]\n* TOTAL: $ 2.76\n# Commercial Equivalent\n* $72.50 Spring Loaded Push Drill [http://www.garrettwade.com/garrett-wade-yankee-push-drill-gp.html?scid=W4011000&gclid=CjwKEAjw3KDIBRCz0KvZlJ7k4TgSJABDqOK7gYO2vcjWjWNRMwKlAOlyfDBY7yFAoVMPz4q8u9-lEhoC7_Tw_wcB Source Link]\n* $15 for shipping per their calculated shipping policy\n* TOTAL: $87.50\n# $ savings and % savings\n* A total savings of $84.74, or more than 3000% in savings.\n\n<nowiki>\n\n.\n\n</nowiki>\n\n{{Page data\n| keywords = 3D printing, drill, hand tool, spring loaded drill, drill bit, plastic, spring\n| sdg = SDG08 Decent work and economic growth\n| published = 2017\n| organizations = Category:Principia, ENGR242\n| license = CC-BY-SA-3.0\n| language = en\n}}\n\n[[Category:Tools]]\n[[Category:Hand Tools]]\n[[Category:Drills]]\n[[Category:OSAT 3D-Printable Designs]]\n[[Category:3D printing]]\n[[Category:Plastic]]"}