Inside Corner Trowel

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Inside Corner Trowel
Project completed.jpg
Description When money is hard to come by and other tools take priority, a tool that makes a corner at a 90 degree angle is usually not high on the list of equipment to buy. I wanted to make a relatively cheap tool that can do this.
Keywords 3D printing, construction, corner trowel, tool
Uses development, industry
Authors Matthew Pollack
Status prototype
Made? Yes
Countries of design United States
Affiliations Category:MTU
Category:MOST
Materials Plastic
Estimated cost USD $ 1.50
Sustainable Development Goals SDG09 Industry innovation and infrastructure
Documentation data
Language English
Manifest data
Language English
Updated 2020-06-04
Author Kathy Nativi
Author affiliation Appropedia
Author email info@appropedia.org

Inside Wall Corner Trowel[edit | edit source]

Project developed by MatthewPollack (talk) 07:05, 6 December 2016 (PST)


Abstract[edit | edit source]

When money is hard to come by and other tools take priority, a tool that makes a corner at a 90 degree angle is usually not high on the list of equipment to buy. I wanted to make a relatively cheap tool that can do this. Normally a tool like this can go from anywhere between $10-20 but since it has a relatively small window of use, it is not often purchased. This project was designed for people that cannot afford a more expensive version of this tool as printing this in PLA is approx. $2.00

Project completed.jpg

Bill of Materials[edit | edit source]

  1. Total two parts made in OpenSCAD. Total ~150 grams of filament
    1. Cornering Tool
    2. Handle
  2. All files posted at : | Youmagine Link

Tools needed for fabrication of the OSAT[edit | edit source]

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

Skills and Knowledge Necessary to Make the OSAT[edit | edit source]

  • None, just connect the two pieces together as shown in the picture.

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Printing Instructions:
    1. Print Speed : 60 mm/s
    2. Fill Density : 25%
    3. Layer Height : .15 mm
    4. Support Type : Touching build plate, ONLY FOR THE HANDLE
    5. Platform Adhesion Type : Glue stick
  2. Print time : ~13 Hours, 8 hours for the main part, 5 for the handle
  3. Assembly Instructions:
    1. Connect the two pieces as shown in the picture above.
    2. Assembly time: 1 minute

Common Problems and Solutions[edit | edit source]

  • Be careful removing the main Cornering Tool piece from the glass bed. Use an exacto-knife and carefully remove to not break the glass.
  • Be sure to use sufficient adhesive on the glass bed so that the main Cornering Tool piece does not have its edges bow upwards.


Cost savings[edit | edit source]

  1. Total Material Amount: 200 grams
  2. Estimated Cost: ~ $1.50 depending on filament price
  3. Commercial Cost: $10-20 | Home Depot's Wall Cornering Tool
  4. Total Savings: ~7.50

References[edit | edit source]