Kreg Jig

About this device
Keywords 3D printing, kreg jig, joint, woodwork
Uses education, industry
Authors Cal McCarty
Status prototype
Made? Yes
Replicated? No
Designed in United States
Affiliations MTU
MOST
Materials plastic
Cost USD $ 0.40
SDGs SDG04 Quality education
Instructions data
Manufacturing files https://www.youmagine.com/designs/drilling-jig
Manifest data
Language English
Updated 2020-06-04
Author Kathy Nativi
Author affiliation Appropedia
Author email info@appropedia.org

Title of the device or system

Project developed by CalMcCarty

This Open Source Appropriate Technology has been designed but not yet tested — use at your own risk.
This Open Source Appropriate Technology has been prototyped.


Abstract

High school shop teachers are on a tighter budget now than ever, and the trades are in higher demand today in local high schools. In wood shop, a lot of tools can cost a lot of money, even the smaller tools. One of these small tools that costs over 20 dollars is a Kreg Pocket Hole Jig. These jigs are used to make holes to join together pieces of wood in products such as tables, clocks, nightstands, or any fine finished wood product. With different sizes of wood and different hardware needed, these jigs can get up into the hundreds of dollars to have multiple jigs in multiple sizes, which is why the code is customizable up to .75 inch drill bits. Having one 3D printer could save a lot of money in this type of tool.

Bill of Materials

Drilling Jig ($0.40) https://www.youmagine.com/designs/drilling-jig

Tools needed for drilling are as follows:

Drill Bit of the proper size hole ($4.99-???) https://www.jcpenney.com/p/irwin-4935108-1-4-x-4-drill-bit/ppr5007602704?pTmplType=regular&country=US&currency=USD&selectedSKUId=62841840018&selectedLotId=6284184&fromBag=true&utm_medium=cse&utm_source=bingshopping&utm_campaign=drill%20bits&utm_content=62841840018&cid=cse%7Cbing%7C004%20-%20home%20furn%20leisure%7Cdrill%20bits_62841840018&msclkid=9fd2eff44170103f18feb3fca172b9c9&adlclid=ADL-ef9cd945-c50e-4d9d-b40b-668c5a3c4112

Clamp ($6.40) amazon.com

Drill ($88.91) amazon.com

Tools needed for fabrication of the OSAT

  1. MOST Delta RepRap or similar RepRap 3-D printer

Skills and Knowledge Necessary to Make the OSAT

  • Angle of the hole (30 degrees from X-axis)

Technical Specifications and Assembly Instructions

  1. Open the .SCAD file with the Jig
  2. Render the file into an .STL file
  3. Open the file in Cura
  4. Select settings that allow for 20 percent infill and 4 outer walls
  5. Build supports and choose zig-zag
  6. Use all other settings the same as for other prints
  7. Save the file as a .gcode
  8. Upload into Franklin and print!

Time to Print

1 hour for 120 mm/s speed with .2mm thickness

Instructions on using the Jig

  1. Place the jig where it is appropriate on the wood
  2. Clamp the jig to the wood
  3. Drill the hole into the wood

Cost savings

  1. $0.40 per jig
  2. $21.99

https://www.kregtool.com/store/c13/kreg-jigsreg/p114/kreg-jigreg-mini/

  1. $21.59 savings
  98% savings!!!

Benefited Internet Communities

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